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    1. On 2018-04-04 16:53:18, user bennedose wrote:

      Here are some further thoughts on the findings presented in the paper. I will first quote lines 276 to 282 from the paper:

      "Third, between 3100-2200 BCE we observe an outlier at the BMAC site of Gonur, as well as two outliers from the eastern Iranian site of Shahr-i-Sokhta, all with an ancestry profile similar to 41 ancient individuals from northern Pakistan who lived approximately a millennium later in the isolated Swat region of the northern Indus Valley (1200-800 BCE). These individuals had between 14-42% of their ancestry related to the AASI and the rest related to early Iranian agriculturalists and West_Siberian_HG. Like contemporary and earlier samples from Iran/Turan we find no evidence of Steppe-pastoralist-related ancestry in these samples."

      The paper clearly states that earlier samples from Swat (taken 1200-800 BCE) did not show steppe ancestry, but had AASI. This must be correlated with what is known from history. By 500 BC Emperor Darius had erected the Behistun monument in Iran which was recorded in Old Persian - which developed after the earlier "Iranian" language Avestan. Avestan was spoken by early Zoroastrians and dates back to 1000 BCE in the Punjab region. Scholars like Darmetester and Mary Boyce show that the Zend Avesta - the holy Zoroastrian book post dated the Vedas and was almost identical to the Atharva Veda. That means that Indo European languages were already there in North West India (Gandhara/Swat area) by 1000 BC and earlier (since the Vedas are dated earlier)

      Now the genetic picture uncovered by this paper shows that the people of the Swat area DID NOT have steppe ancestry in that period (1200-800 BCE). But Indo European Languages were already present in the area. This rules out the connection between steppe ancestry and Indo-European languages. In India, Indo-European languages pre-dated steppe ancestry.

    1. On 2020-10-01 15:17:11, user Muhammad Zakiruddin Chowdhury wrote:

      This research was conducted by members of Globe Biotech and Globe Biotech is presenting this as a publication in International Journal. They conveniently skipped mentioning that it has not been peer reviewed. Please google Bangladesh English News portals on 01 and 02 October and you will find more.

    1. On 2022-09-19 07:58:28, user zhljude wrote:

      Hi Thomas Burger:

      This article is a nice work. However, the low resolution of the Figures makes it confused to understand the content of the article. Could you provide clearer Figures ?

      Best regards<br /> Jude

    1. On 2017-11-10 18:07:39, user James Lloyd wrote:

      I would like to thank you for the interesting pre-print and tool. I really enjoyed reading about this tool for fast quantification of alternative splicing events, including complex events not often captured by other approaches.

      Comments:<br /> Page 5: I wanted to know more about the identification of novel AS events. There is mention of "pseudo-de novo AS event identification (see below)" but then it is not discussed again, as far as I could see. I think discussing what sort of de novo events, with junctions not explicit in the transcriptome annotation provided Whippet can find would be really helpful.

      Page 10: "HeLa whole cell, nuclear, and cytosolic fractions, as well as mono- and polysomes", it is worth pointing out that the RNA in the polysomes used in study #5 were from HEK293T cells.

      Page 30: "Additional nuclear and whole-cell HeLa fractions originating from a different paper were also analysed as a comparison" what paper is the HeLa fractions from?

      PS, as a Yorkshireman, I appreciate the name Whippet.

    1. On 2020-12-24 18:56:48, user Charles Warden wrote:

      Thank you for posting this preprint.

      I noticed that there was highlighting of sentences throughput the manuscript. Was this intentional, or should those be removed after editing and discussion?

    1. On 2020-10-02 16:28:20, user David Ross wrote:

      This preprint is related to an earlier preprint with the same title (https://www.biorxiv.org/con...: "https://www.biorxiv.org/content/10.1101/2020.07.10.197574v1):") We received feedback that the earlier manuscript contained too many ideas for one paper. So, we split the story into two parts. The part contained in this manuscript includes a description of the measurement and a discussion of what the results can tell us about LacI allostery. A subsequent manuscript will focus on the use of the results for precision engineering of genetic sensors.

    1. On 2015-08-22 15:37:34, user Edouard Debonneuil wrote:

      format suggestion: at the end of the first sentenceof thediscussion, list many articles rather than only 2 (eg list of references embedded in Sven Bulterijs and David Gems' articles)

    1. On 2021-09-01 00:46:56, user Tom J wrote:

      Please check Fig 1d relative to the text on page 4...seems contradictory. If the Alpha spike/Delta backbone replicated less efficiently than Alpha, the ratios should be >1. Is the y-axis in the figure correct?

    1. On 2024-06-28 13:20:02, user Jo Wolfe wrote:

      Interesting preprint! Regarding the intro, indeed the oldest direct fossil evidence is Jurassic...but we recently found that the crown group of Brachyura are probably Triassic<br /> https://academic.oup.com/sy...

      Also, in our 2021 Bioessays paper, we did suggest the pleon folding in metamorphosis may be due to Abd-A repression, so it's cool that you found support for that result

    1. On 2014-02-14 23:56:27, user Casey Brown wrote:

      This is a very nice paper.

      A have a few questions/comments:

      1. On the classifier. Did you attempt any other<br /> approaches? Could you provide more details on how the cell type specific probes<br /> were selected? Were they simply the 58 most correlated probes? Were they<br /> selected in any way to maximize independent signals? Did you consider the NNLS<br /> approach used by Battle et al.?

      2. Limiting search to previously identified,<br /> additive cis-eQTLs. As the authors note,<br /> limiting the search for interaction-eQTLs (as opposed to searching the full set<br /> of cis-SNPs) almost certainly downwardly biases the fraction of<br /> interaction-eQTLs identified, because they previously selected for SNPs that<br /> explain a large proportion of the variance in an additive model. Of course, this effect will be even more<br /> dramatic for the eQTLs with larger effects in the minority cell<br /> population. Could the authors perform<br /> the analysis on the full set of SNPs on at least a subset of the data?

      3. Characteristics of interaction-eQTLs. The analysis of GWAS overlap is nice, but it<br /> would be great if the authors pushed this a bit further. Are these genes enriched for genes that are<br /> differentially expressed between cell types? Are the distributions of SNP to<br /> TSS distances different between the different classes? Are there cell type<br /> specific regulatory element (e.g. DHS?) datasets that can be used to interpret<br /> these findings?

      4. Cell type gene expression signature. Are there<br /> genetic variants that are associated with the proportion of neutrophils? When<br /> you include the cell type term in the model, do you increase the number of<br /> identified additive cis-eQTLs? (I.e., does heterogeneity add noise to the<br /> standard analysis?) Relative to uncorrected expression data? Relative to covariate-naïve latent variable<br /> removal?

      5. Examples. It would be nice to see a few plotted<br /> examples of particular gene-SNP combinations that have significant interaction<br /> eQTLs. In particular, it would be nice to see the data from one or both of the<br /> datasets where the cell type counts were directly quantified.

      <cross posted="" on="" haldane's="" sieve,="" bc="" i'm="" not="" sure="" what="" the="" protocol="" is="" in="" the="" pppr="" world="">

    1. On 2020-05-09 23:10:52, user Dima Shvartsman wrote:

      Excellent and thorough work. Limiting the proliferation of non-committed cells is very important for the safety of transplanted cells and a reduction of heterogeneity in the cell population.

    1. On 2019-11-15 21:12:39, user Tyler Square wrote:

      Cyclostomes (lampreys and hagfishes) are not established as being 2R, and they are unaddressed here. It seems like you are actually addressing gnathostomes and the gnathostome common ancestor, not "all vertebrates" and their ancestor (per the first sentence of your abstract).

    1. On 2021-04-05 03:48:58, user Zohreh Khosravi wrote:

      Congratulations with your amazing paper. I have a question and really appreciate you if you could help me in this matter.<br /> when You performed a whole genome CRISPR screen in cancer cells to identify regulators of T cell killing. One of your hits leads to increased killing of your cancer cells in presence of T cells but it represents an uncharacterised protein. What is the hypothesis and which three experiments would you carry out to elucidate the function of your hit?<br /> Best Regards,<br /> Zohreh

    1. On 2019-02-12 18:23:11, user Eve Wurtele wrote:

      In Arabidopsis, in silico predictions followed by experimental evidence indicate that the de novo orphan QQS gene was quickly integrated into the metabolic network affecting carbon and nitrogen partitioning, and into a network conferring broad-spectrum resistance; most significantly, because QQS interacts with conserved network elements, introduction of QQS into other plant species confers the same effects (Li et al .,2015, PMID: 26554020 ; Qi et al., 2019, PMID: 29878511 : Li et al., 2009, PMID: 19154206; Arendsee et al, 2014, PMID: 25151064)

    1. On 2018-04-05 15:18:51, user Andrew Millar wrote:

      Smallwood et al. tested lipid synthesis in nutrient-limited conditions with added glycerol, in a preprint published a day before this one, https://doi.org/10.1101/293704. Sadly we did not see this or their January preprint on lipid droplet release prior to our publication, so will take their work into account during revision.

      Intriguingly, the three, unknown proteins that are highlighted as being up-regulated in nutrient-limited conditions in their paper were also up-regulated in prolonged darkness in our results (their RefSeq protein identifiers below), suggesting that what we propose as a quiescent 'dark state' might be similar to their lipid-release state:

      XP_003078347 is now ostta03g04500, an abundant protein in our Fig. 2a, Fig. 4B.

      XP_003078347 is now ostta09g00670, an unknown protein, in Fig. 4A.

      XP_003078347 is now ostta02g03680, unkown protein with a putative BAR domain, in Fig. 4A and EVFig. 7a,7b.

    1. On 2021-04-19 14:22:39, user Milka Kostic, PhD wrote:

      Dear authors,<br /> Thank you for sharing this preprint with the community. I read the preprint with interest, and I am sharing the comments below in hope they will be helpful to you as you go forward with publishing and sharing your new findings further.<br /> Kind regards,<br /> Milka

      Comments to the authors:<br /> In this preprint by Shao, Yang, Ding et al. the authors describe an expansion of the PROTAC (Proteolysis Targeting Chimera) concept into a new direction: using chimeric molecules that combine a DNA sequence fragment (used here to recruit DNA binding proteins) and an E3 ubiquitin ligase binding warhead (used here to recruit either VHL or cereblon (CRBN)). The resulting hybrid molecules are referred to in this preprint as O’PROTAC, short for oligonucleotide PROTACs. The big motivation for this work is the lack of strategies to target majority of transcription factors (TFs). <br /> TFs represent a large and diverse class of proteins that are critical for many different aspects of biological regulation. They could also be viewed as essential targets for drug development; and yet, outside targeting nuclear receptors (NRs), which represent a subfamily of TFs that are endogenously regulated through small molecule binding and have therefore evolved to bind drug-like molecules, efforts to develop chemical tool compounds and/or drug leads that target TFs has been difficult. <br /> Couple of relatively recent breakthroughs in this are IMiD compounds (immunomodulatory imid drugs) - small molecules that serve not to inhibit protein-protein interactions, but rather to promote complex formation between an E3 ubiquitn ligase and different TFs (such as SALL4, IKZF1, IKZF3), resulting in fully functionally competent E3 complex that marks these TFs for proteasomal degradation. In many ways this is similar to the effect of PROTACs, another kind of small molecule degraders, that feature two warheads connected via a linker. One warhead binds an E3 ubiquitin ligase (usually VHL or CRBN) and the other is a ligand for a protein of interest. By now, PROTACs targeting many different targets have been developed, but when it comes to TFs finding the ligand that can be transformed into the PROTAC warhead remains a major bottleneck.<br /> Enter Shao, Yang, Ding et al. - these authors exploit the fact that TFs bind specific DNA sequences, usually short-ish oligonucleotide sequences. They design O’PROTACs to include double-stranded oligonucleotides, on one hand, and a VHL or a CRBN warhead on the other. The two proof of concept target TFs they focused on are ERG transcription factor and Lymphoid enhancer-binding factor 1 (LEF1), both clinically relevant.

      Dealing with nucleic acid based reagents requires special delivery methods (which is the down side of this strategy), so the authors used lipid-mediated transfection. They were able to observe:<br /> - degradation of exogenously expressed HA-ERG in 293T cells as monitored by western blotting<br /> - CRBN-based O'PROTACs had a stronger effect than VHL-based ones<br /> - ERG degradation could be achieved in prostate cancer cell line VCaP that overexpresses ERG as well as its truncated form (TMPRSS2-ERG)<br /> - degradation of ERG has the expected downstream effect on its transcriptional targets<br /> - similar behavior was noted for LEF1, and LEF1 targeting O'PROTACs were able to inhibit prostate cancer cell line proliferation; however some of the validation steps done for ERG O'PROTACs (ERG pulldowns, and proteasome dependence) do not seem to be included for LEF1.

      I think this is an important proof-of-concept work, albeit a bit preliminary. What authors could have done a bit differently is:<br /> - try to be more quantitative (it's unclear how large the observed effects are)<br /> - use a negative control (create O'PROTACs that don't bind to the ligase, or feature an oligonucleotide that has no target binding); negative controls are essential and some work around developing a high quality negative controls for O'PROTACs would be useful<br /> - have the authors tried to see if their O'PROTACs have an effect on cells where ERG (or LEF1) have been deleted? These experiments are important when validating new modalities.<br /> - provide some commentary about and/or evidence that they affect their target cleanly (selectively). Are there any other TFs that would potentially bind to the oligonucleotide motifs they used here?<br /> - provide a more useful discussion of the design consideration for O'PROTACs, potential limitations of this strategy, and how to get the most out of using them as a research tool; in the current form the Discussion is not necessarily all that useful for anyone interested in using this technology. <br /> - (in the future) it would be cool to see what happens in cells that don't overexpress ERG. Have the authors tried those experiments?

      Congratulations on driving forward this interesting new concept of O'PROTACs and I hope my comments help you strengthen your technology further.

    1. On 2019-05-10 17:15:35, user Leslie Vosshall wrote:

      We discussed this interesting paper at the Vosshall Lab Olfaction and Behavior Journal Club on May 8, 2019. The use of GCaMP for peripheral antennal imaging is really exciting because it opens up Anopheles mosquitoes to comprehensive investigation of mechanisms of olfaction. The paper also takes on the thorny question of the mechanism of action of insect repellents. The big ideas out there are: 1. DEET smells bad and repels insects. 2. DEET soaks up human body odor, making you invisible to them. 3. DEET scrambles the mosquito odor code so that humans smell like pizza-vomit-coffee-gasoline or something rather than just humans. This paper provides more evidence for model 2. Syed and Leal (PMID: 18711137) first pointed to DEET as binding odorants as the mechanism for blocking mosquito biting (e.g. if you coat yourself with DEET you become invisible) (model 2). Syed and Leal also provided evidence that DEET smells and repels, by activating olfactory neurons (model 1). Our group published a response to this and showed contrary evidence that at the concentrations we tested that DEET did not prevent odorants from volatilizing (PMID: 21937991). Our current data in fly and mosquito are consistent with model 3. This paper shows that DEET does NOT activate olfactory neurons but bind odorants (model 2), so neither model 1 nor model 3.

      So which model is correct? DEET is a seductive molecule to study scientifically; we are still no closer to closure on its mechanism of action and this paper adds an additional wrinkle that is worthy of further investigation by the field.

      We had the following feedback and questions (in no particular order):

      1. In Figure 1, is it possible to do an overlay to estimate which of the 7 identified cells reliably respond to which of the 6 tested odorants? This would extract more information from the figure and give some initial glimpses into mosquito odor coding.
      2. Scale Bar missing Figure S1
      3. The graphics would be easier to “read” if the Tufte “chart junk” of background grids were removed to let the data take center stage (example Figure S3a)
      4. The 1-octen-3-ol in Figure 1d and Figure 2a appear to be the same image, duplicated in different figures. It would be ideal to provide a new image or disclose this in the Figure 2 legend.
      5. We wondered if the odor activation code is really consistent across all segments, such that focusing on one segment would give a universal answer for all antennal segments? Or is there some zonal nature or functional specification that would alter the conclusions? The whole antenna images in Figure S1b suggest some variability in how many neurons are activated in a given segment.
      6. Do the natural repellents block/change odorant responses as DEET does to 1-octen-3-ol? We could not find this experiment in the paper.
      7. The paper focuses on one odor 1-octen-3-ol to build the case that DEET acts merely to reduce drastically the volatility of this odorant, thus reducing/eliminating the delivery of this odorant to olfactory neurons. Is this the case for other odorants? How would this one DEET molecule be able to reduce, mechanistically, the volatility of the hundreds of different molecules emitted by the skin? We are not chemists but DEET does not seem to be particularly reactive. Is it a covalent attachment promiscuously to every odorant or more hydrophobic van der Waals mechanism that blocks odorants from volatilizing when mixed with DEET? How could this work given the enormous range in the chemistry of human odor volatiles?
      8. Is Anopheles coluzzi repelled by DEET behaviorally?
      9. PIDs measure bulk ionized molecules but cannot identify them. What are the prospects for repeating this with GC-MS?
      10. Finally, if DEET acts by binding odorants on our skin rather than acting to repel (model 1) or confuse (model 3) wouldn’t you be bitten if you had a swath of skin that was not coated with DEET that was giving off human odor fumes?
    1. On 2024-05-10 08:11:47, user Stefano Vianello wrote:

      Dear Dr. Blotenburg,

      I'm Stefano, the author of REF 20 re endoderm-rich gastruloids. In the Discussion section of your manuscript you write that

      [REF20] maintained mESCs in 2i-medium and reported faithful emergence of endoderm cells

      . Given the importance of mESC culture conditions in your analyses and possible future interpretations (at least, re endoderm), I wanted to point out that — following the practice of the lab I was working in at the time — mESCs were not grown in the classic 2i medium (2i in N2B27), but in fact in a 2i in ES+LIF medium (exact recipe in REF20's Materials & Methods > Cell culture). Based on gastruloid end-phenotype alone (of those shown in FigS1), I would guess this atypical mESCs culture medium is most closely matched by your culture condition 3 (and possibly condition 4), and that those conditions (though they were not selected for scRNAseq) are giving rise to endoderm-rich gastruloids.

      Sincerely,<br /> Stefano Vianello

    1. On 2025-05-06 17:52:12, user Alizée Malnoë wrote:

      In this manuscript, Miyazaki et al. studied the interactions between EcLptM and EcLptD/E, by performing mutagenesis experiments, immunoblotting, crosslinking assays and solving the structure of the EcLptD/E/M complex via cryoEM, to further understand the role of LptM in LptD assembly and maturation. This study revealed that LptM has an essential region (C20GLKGPLYF28) within its N-terminal domain that interacts with LptD, although possibly slightly longer as discussed below. Consistent with the resolved cryoEM structure of EcLptD/E/M, in vivo disulfide crosslinking experiments revealed that LptM residue F28 is involved in the interaction with the LptD barrel domain. Additionally, residue G21 was shown to be critical for the function of LptM in the maturation of LptD. Also, the authors revealed the timing at which LptM interacts with LptD, showing that it acts at the late maturation step of LptD, after the action of BepA. The manuscript is well-written, and the conclusions made are supported by the data presented. We provide major and minor comments to help clarify some of the data and interpretations made.

      Major comments<br /> - Figure 1C. Could you explain why erythromycin sensitivity increased in the ?bepA strain, while it resembled that of WT in the ?lptM strain? Does it mean that maintaining a well-folded ?-barrel domain is sufficient to maintain OM integrity? This is beyond the scope of this study, but do you think that would also be the case in ?dsbA strain?<br /> - Figure 1E-F. Narita et al., 2016 concluded that BepA might play a role in facilitating the interaction of LptD and LptE at the BAM complex. This conclusion was based on the observed suppression of erythromycin sensitivity when overexpressing lptE in a ?bepA strain which you also observed. Consider including this hypothesis as part of the discussion.<br /> - Figure 2B. Could you explain the accumulation of LptDC in K33amb and A35amb strains? Could it mean that LptM becomes less stable, or are these residues essential for LptM function? <br /> Lines 174-183 and lines 248-250: The interpretation that LptM in the cryoEM model stabilizes the folding of LptD due to the observed tight closure of the ?-barrel junction is not fully convincing. It was based on comparisons made with the crystal structure of S. flexneri and an Alpha-fold model. Would it be possible to perform the comparison with a cryoEM structure of EcLptD/E without LptM instead, to see whether the junction is tightly closed in the absence of LptM or not? Or maybe do the comparison with the solved crystal structure (only ?-barrel domain) of E. coli (PDB ID: 4RHB)?<br /> - Figure 4B. Consider showing the +ME lane between 15 and 20 KDa with ?FLAG antibody to control that LptM is present.

      Minor comments<br /> - Introduction (Lines 80-88): Could you add to the LptM paragraph that it interacts with the LptD/E translocon by mimicking LPS binding?<br /> - Figure S4A (middle). The crystal structure presented (PDB ID: 4q35) is for Shigella flexneri and not E. coli.<br /> - Lines 176-177: The crystal structure solved in Qiao et al., 2014 is for Shigella flexneri and not E. coli.<br /> - Figure 5 and Lines 208-209: Could you clarify why alanine, cysteine and tryptophan were chosen for the mutagenesis experiment? Is it because they represent a non-polar (small), polar and non-polar (bulky) amino acids, respectively? <br /> Also, the data shows that only when G21 was mutated to Trp (and not to Ala or Cys), was the LptM activity affected. Could you explain why? And whether it has to do with steric hinderance or that the bulkiness of Trp obscures an essential interaction between other two amino acid residues? Could you show with what residues of the ?-barrel domain G21 interacts in the cryoEM structure?<br /> Also, could you show an alignment of the conserved region with LptM homologs in the Enterobacteriaceae family and show whether G21 is conserved?<br /> - Lines 243-245: “Considering that this short essential region tightly interacts with the ?-barrel domain of LptD (Figure 3, 4), it is unlikely to serve as a recruiter for the disulfide oxidase DsbA or disulfide isomerase DsbC to the LptD intermediate”, Could you explain why being in tight interaction with the ?-barrel domain rules out the possibility that LptM recruits either DsbA or DsbC? Also, could you re-type “Considering that this short essential region....” to “considering the short essential region of LptM ....”, because it is not clear to the reader if you were referring to LptM. <br /> - Section 5 (Lines 218-250): Since this section describes the model, could you make the model a main figure instead of a supporting figure?<br /> - Lines 261-263: Could you remove “consisting almost entirely of signal sequences”, because, for example, LptM is not made entirely from a signal sequence or clarify that you are referring to the secreted proteins.

      Sally Abulaila, Kim Kissoon and Habib Ogunyemi (Indiana University Bloomington) - not prompted by a journal; this review was written within a Peer Review in Life Sciences graduate course led by Alizée Malnoë with input from group discussion including Michael Kwakye, Madaline McPherson, Madison McReynolds, Mandkhai Molomjamts, Octavio Origel and Warren Wilson.

    1. On 2025-08-26 09:30:10, user Constant VINATIER wrote:

      Feedbacks about your preprint : https://doi.org/10.1101/2025.08.01.668136

      About registration: <br /> We could not find any information about the pre-registration of your study in the pre-print. Pre-registration involves documenting the hypotheses, methods, and/or analyses of a scientific study prior to its conduct (10.1073/pnas.1708274114; 10.1038/s41562-021-01269-4). If your study was pre-registered, we strongly encourage you to include the registration number in the pre-print, ideally in the abstract make this important information easy to retrieve, as this practice enhances transparency and reproducibility. If the study was not pre-registered, this should be acknowledged as a limitation. For future studies, we recommend pre-registering on an appropriate repository.<br /> About Protocol Sharing: <br /> We did not find the protocol for your study. If you have one, we encourage you to share it as supplementary material or deposit it in a publicly available repository such as the Open Science Framework ( https://osf.io ) or Zenodo ( https://zenodo.org/) "https://zenodo.org/)") . You can then include a statement in the Methods section indicating that your protocol is openly available (e.g., 'The protocol for this study is available at (link)/ in the supplementary'). Sharing your protocol will help readers better understand your study and enable them to reproduce it if they wish to test it.<br /> About the Statistical Analysis Plan Sharing: <br /> We did not find the Statistical Analysis Plan (SAP) for your study. If you have one, we encourage you to share it as supplementary material or deposit it in a repository such as the Open Science Framework ( https://osf.io ). You can then include a statement in the Methods section indicating that your protocol is openly available (e.g., 'The SAP for this study is available at (link)/ in the supplementary'). Sharing your SAP will help readers better understand your study and enable them to reproduce it if they wish to test it.<br /> About Deviations and/or changes<br /> We could not find any information about potential deviations or changes to the protocol in your pre-print. Since such deviations are common, if this applies to your study, we strongly encourage you to include a subsection titled Changes to the Initial Protocol in the Methods' section and discuss these changes as a potential limitation of your results. If any deviations occurred during your study, please specify them in this new subsection.<br /> About Data sharing / FAIR Data<br /> We found insufficient information about your data sharing approach. Data should be findable, i.e. data are to assigned a globally unique and persistent identifier (for instance there is a DOI assigned to the dataset, or data are registered or indexed in a searchable resource). Data should also be accessible, i.e. data are retrievable by their identifier and can be accessed following an open, free, and universally implementable protocol. As your data id not sensitive data, we encourage you to share it openly on a data sharing repository (Dryad, etc.) and include the Digital Object Identifier (DOI) in the Methods section. If you want more information about good practices of data sharing, visit https://www.go-fair.org/ <br /> About Code sharing<br /> We could not find any information about your (statistical) code. Sharing code is important for enhancing transparency and reproducibility, especially since it does not contain sensitive information. We encourage you to openly share it on a code sharing platform (Github, Codepen, CodShare, etc.) and include the Digital Object Identifier (DOI) in the Methods section. If you want more information about Code sharing https://fair-software.nl/ .

    1. On 2017-12-19 22:04:47, user Chris Gorgolewski wrote:

      Thanks for your reply. This is a great conversation to have.

      I remain skeptical about Point 3 - especially if Bob decides to test a hypothesis not reported in the original paper. Such analysis might not yield expected results even if the hash and and order was correct indicating a problem with data and experimental design which would be then conflated with academic fraud (an accusation one should be very careful with).

      As for the range of possible pseudo random sequences please mind that fMRI design efficiency will impose some constraints on the item sequence that would be usable in a given experiment. This combined with the fact that two different sequences could yield very similar results (making it very difficult for Bob to be able to say if differences he sees in his results are due to differences in processing pipeline, differences in hypothesis he is testing, or fraud). I'm afraid that limiting the entropy of the sequence generator will be the easiest way to game this system.

      BTW I could not find the part of the example where Bob evaluates entropy of the sequence generator in your manuscript.

      PS Love the photoshop rebuttal.

    1. On 2017-07-20 20:08:48, user Néstor Saiz wrote:

      Nice work in looking at the role of transcription/protein degradation in this fate decision.

      However, it would be good if you discuss on the paper how your treatment regimes compare to those we did in our Nature Comms 2016 paper. Especially since a lot of your conclusions seem to confirm our observations, although this is not acknowledged. We already propose that it is the double positive cells (NANOG+, GATA6+) the ones whose fate is affected by FGF signaling modulation, and not the single positives. As a consequence of their progressive specification towards either epiblast or PrE, the response to the treatment at the population level changes over time.

      Also, regarding your quantifications in the methods, it isn't currently clear how cell populations were scored - I seem to both understand that cell types were assigned manually but also that there was some sort of segmentation to measure protein? At this point, it would be worthwhile elaborating on how measurements were done, whether any correction or transformation was done to the data, etc., as this affects the statistical analysis. Also, maybe automate the fate assignment based on measured protein expression, or justify why not.

      Nestor

    1. On 2018-08-07 15:42:17, user cplaisier wrote:

      Very cool and intersting work. Had one issue and one suggestion:

      Issue. Adding a spike-in won't help with determining the fraction of RNA-seq reads coming from ambient RNA in the soup. The spike-in would be generated from a known distribution because you spike-in a given amount. The ambient RNA in the soup would be as you say experiment and channel specific. The two distributions are not related and as such a spike-in would not be a great solution to the determining the amount of ambient RNA contamination. Am I missing something?

      Suggestion. Could you use the transcripts which show up in the less than 10 UMI cells to catalog transcripts which will have contamination. Coming up with a genes likely to be unexpressed is potentially difficult and dagerous if the assumption is in correct. It seems like coming up with a more standardized approach for this would be highly beneficial.

    1. On 2019-10-24 16:35:01, user Ian Fiebelkorn wrote:

      Traveling waves and rhythmic sampling during attention. The authors describe traveling waves in the marmoset visual cortex (area MT) associated with both elevated neuronal responses and elevated perceptual sensitivity during a difficult visual detection task. I very much enjoyed reading this excellent manuscript, which describes a perceptually important phenomenon. Near the end of the manuscript, the authors speculate that this traveling wave phenomenon might explain previous reports of attention-related relationships between pre-target theta (3-8 Hz)/alpha (9-14 Hz) phase and behavioral performance (e.g. Busch and VanRullen, 2010, PNAS; Fiebelkorn et al., 2018, Neuron; Gaillard et al., 2019, BioRxiv; Helfrich et al., 2018, Neuron; Fiebelkorn & Kastner, 2019, TICS). This is an intriguing possibility that remains to be tested. Here, I will point out some of the differences between what is described in the present manuscript and the attention-related effects that we recently described based on recordings in the fronto-parietal network.

      (1) The authors contend that these traveling waves are much more predictive of perceptual sensitivity than previous reports of links between visual-target detection and either pre-target alpha or theta phase. First, it is difficult to compare the overall magnitude of effects given differences between the tasks, differences in recording techniques, differences in species, differences in brain regions (sensory cortex vs. higher-order cortex), and differences in how the data were analyzed. For example, we used a broad phase window (of either 90 or 180 degrees, see Figures 3 and S7 in Fiebelkorn et al., 2018, Neuron) when calculating phase-dependent hit rates. This smoothed the data (i.e., phase-detection relationships), biasing the behavioral effects downward. Second, whereas the present manuscript measures the phase of a wideband signal (5-40 Hz), we measured frequency-specific phases. Moreover, our results demonstrated that higher-frequency activity (e.g., in the beta band) was modulated by the phase of theta-band activity. When we accounted for the phase of both higher and lower frequencies there was a stronger link to the likelihood of visual-target detection. Third, whereas performance in the present task was at approximately 50% detection, performance in our task was at approximately 80%, leaving less room for behavioral modulation.

      (2) Unlike the present manuscript, which describes a link between visual-target detection and the phase of spontaneous events. We describe a link between visual-target detection and what appear to be ongoing theta-dependent changes in neural activity. That is, we report evidence that higher-frequency activity is associated with visual-target detection at various time points (from -500 to 0 ms) prior to target presentation (Figure S11 in Fiebelkorn et al., 2018, Neuron), not only the time period just prior to target presentation. To be more specific, our data show, e.g., alternating periods when either higher or lower beta-band activity is associated with better behavioral performance. That is, higher beta-band activity occurring at either -500 or -250 ms (relative to target presentation) is associated with a higher likelihood of detection, while lower beta-band activity occurring at either -375 or -125 ms is also associated with a higher likelihood of visual target detection. In our data, higher beta-band activity (in FEF) just prior to target presentation is generally associated with better detection, so why would lower beta-band activity, e.g., at -375 ms also be associated with better detection? Because the strength of beta-band activity oscillates at a theta frequency, and a period of lower beta-band activity at -375 ms indicates that the strength of beta-band activity will oscillate back to a high point just prior to target presentation. This is just one example, but our data generally indicate behaviorally relevant, theta-dependent structure in the ongoing neural activity, rather than spontaneous events (see also, e.g., Figure 2 in Helfrich et al., 2018, Neuron).

      (3) The present manuscript links behavioral performance to pre-target phase in a wideband (5-40 Hz) signal, finding no relationship to behavior when the data were filtered to isolate either alpha- or beta-band activity. In comparison, we report links between behavioral performance and narrow-band activity, in the theta, alpha, and beta bands (Figure 3 in Fiebelkorn et al., 2018, Neuron). Moreover, we show that these frequency-bands are functionally distinct by linking them to specific, functionally defined cell types.

      (4) While it remains to be tested whether traveling waves are coordinated across brain regions, we have shown (Fiebelkorn et al., 2019, Nature Communications) that attention-related rhythmic sampling is characterized by theta-dependent changes in between-region functional connectivity (across cortical and subcortical nodes of the attention network).

    1. On 2019-07-19 00:23:12, user Guillermo Parada wrote:

      In the discussion you said "There is no evidence for RNA editing to modify splice sites yet", however at least in vertebrates there is evidence of GT-AA introns that are activated by ADAR and transformed to GT-AI (read by the spliceosome as GT-AG). In 2014 we found 7 putative splice sites that can be activated by A-to-I editing and one of them, located at ADARB1, was previously found by other researchers (see Table 2; https://academic.oup.com/na... "https://academic.oup.com/nar/article/42/16/10564/2903109)"). It might not be a very frequent event as non-canonical introns are very rare, but it's very interesting how different RNA processing events interplay during transcription.

    1. On 2024-10-07 14:40:02, user BindCraft Enjoyer wrote:

      I like the ‘Design-Until’ architecture of the BindCraft pipeline, but one thing I couldn’t find in the paper is any quantification of BindCraft’s in silico design success rate. In the Introduction, you note that one drawback of RFDiffusion/MPNN-based pipelines is the need to screen thousands to tens of thousands of designs in silico before finding the 10-100 that pass the quality metrics and can be tested experimentally with good success rates. Does BindCraft also require screening of thousands to tens of thousands of designs, or is it more efficient in silico than an RFDiffusion pipeline? You mention in the paper that BindCraft outputs statistics from each design run, and that biasing away from alpha helical binders reduces the in silico design success rate; so it sounds like you have the statistics ready to hand, at least for the targets reported in the paper. I’d love to see these design success rates added to a table, either in the main paper or the SI.

      Another thing I’d like to see is some quantification of the compute time and cost required to run the 4-step pipeline until 100 designs pass the in silico filters. I understand this cost scales with target/binder size and target difficulty, but I would imagine you have the data required to calculate these metrics at least for the design campaigns reported in the paper. I saw on Twitter that you’re working on a direct BindCraft / RFDiffusion pipeline comparison; I hope you’ll include the computational hardware and total CPU/GPU time for each side of that design campaign.

      Great work!

    1. On 2019-11-01 10:13:27, user Rudolf Meier wrote:

      We used two different primer pairs to check for consistency. With regard to the pig DNA, it is consistently found with both primers for the products of a certain supplier. Upscaling is certainly needed, but it's arguably even more important to have a sampling scheme that is tied to specific targets (e.g., volume of sales; sale of endangered species; preventing fraud in mixed-species samples through regular checking, etc.). MinION is a technique that is quite versatile and one can now design with regulatory targets in mind instead of having to think too hard about how to sequence it all with Sanger sequencing without spending too much money (and Sanger sequencing would fail for mixed-species samples).

    1. On 2025-10-02 06:19:23, user Wolfgang Graier wrote:

      This is a thrilling work! Thank you for sharing it with the community. Did you had a chance to test for differences in mitochondrial dynamics and motility upon various ratios of L-MFN2 and S-MFN2? Good luck with publishing.<br /> Best, Wolfgang

    1. On 2020-06-10 18:25:05, user Simon Drescher wrote:

      To add some more literature which is not mentioned in the manuscript:

      A review about asymmetric phospholipids: Huang and Mason, 1986 BBA 864, 423-470; "Structure and properties of mixed-chain phospholipid assemblies".

      And some original work about the SDPC including x-ray studies and freeze-fracture electron micrographs: Hui et al. 1984 Biochem. 23, 5570-5577; "Acyl Chain Interdigitation in Saturated Mixed-Chain Phosphatidylcholine Bilayer Dispersions".

      Finally, McIntosh et al. 1984 Biochem. 23, 4038-4044; "New Structural Model for Mixed-Chain Phosphatidylcholine Bilayers" - a whole paper about SDPC using x-ray.

      Hence, the biophysical properties of SDPC are known for >35 years ...

    2. On 2020-06-08 13:55:57, user Simon Drescher wrote:

      SDPC should be 1-stearoyl-2-decanoyl-sn-glycero-3-phosphatidylcholine instead of "2-decyl" - since two ester bonds are in SDPC.

      Futher, I think the relevant literature is not mentioned in this article, for example:

      Lewis et al. 1994 Biophys. J. 66, 207-216; "EnigmaticThermotropic Phase Behavior of Highly Asymmetric Mixed-Chain Phosphatidylcholines That Form Mixed-lnterdigitated Gel Phases" describing the the phase behavior of SDPC, the lipid used in this study.<br /> and

      Lewis et al. 1994 Biophys. J. 67, 197-207; "Studies of Highly Asymmetric Mixed-Chain Diacyl Phosphatidylcholines that Form Mixed-Interdigitated Gel Phases: Fourier Transform Infrared and 2H NMR Spectroscopic Studies of Hydrocarbon Chain Conformation and Orientational Order in the Liquid-Crystalline State"<br /> ...to name only two.

      Finally, statements such as "It is not currently known what biophysical properties membranes composed of asymmetric lipids will display" are not true, since these properties are already known. Also, the fact that asymmetrical phospholipids show chain interdigitation is not new.

    1. On 2020-11-25 14:39:12, user Richard Zimmermann wrote:

      Dear Sarah and Steve, congratulations, that’s a really cool and timely study with milestone potential for both drug screening strategies and fight against viral infections.<br /> We all have been following news on the search for small molecules as potential antivirals in the fight against COVID-19 and related clinical trials with great interest for almost the entire year 2020. We realize that there are trials with RNA-polymerase- and viral protease-inhibitors and that there are great efforts under way to develop e.g. TMPRSS2-inhibitors as well as new viral protease-inhibitors. What we have not yet seen to be systematically addressed as potential small molecule SARS-CoV-2 antivirals, however, are the Sec61-inhibitors. The last decade has led to the discovery of a constantly growing list of Sec61 targeting small molecules and toxins, including cyclic heptadepsipeptides (such as cotransin 8 and CAM741), eeyarestatins, apratoxin A, mycolactone, Ipomoeassin-F, and Coibamide A, which can be expected to inhibit the biogenesis of viral membrane proteins in infected human cells. I am convinced that it is worthwhile to pursue Sec61 inhibitors as potential antivirals. Therefore, it is fantastic that you have started to tackle this subject with your study on the biogenesis of CoV-2 membrane proteins in a cell free system. I realize that there is a long way to go with this project, as you correctly point out in your exciting manuscript. But even if it does not lead to a therapeutic approach or combination therapy in the current crisis, it may well do so for the next viral pandemic.

    1. On 2020-05-21 22:35:56, user GG Anderson wrote:

      excellent work. Is the inhibition mechanism known? It seems that ORF3b could either block transcription by binding to TF region that controls IFN-1, or impede translation by binding to mRNA.

    1. On 2019-05-01 21:54:01, user Brian DeVeale wrote:

      Awesome work! Perhaps the wrong forum, but it looks like the command for converting v2 objects to v3 is 'UpdateSeuratObject' in R and listed as 'UpgradeSeuratObject' in the FAQ on your website.

    1. On 2020-03-16 22:12:55, user Laura Sanchez wrote:

      Dear Yu and Petrick, this preprint was discussed in a lab meeting and we would like to offer the following for review. Thank you for posting this very interesting manuscript. Best, The Sanchez Lab:

      As frequent users of molecular networking tools which are based on tandem MS data, we enjoyed reviewing a method not commonly used in our lab. It is clear that reactomics networks may help to identify analogs of compounds that are not easily matched by MS2 networking, especially for molecules with poor fragmentation patterns. We are very interested to see the application of linking enzymes to disease states through metabolomics approaches. That said, we have also included a list of critiques and suggestions for the preprint.<br /> Major:

      • Networking tools incorporating mass shift and KEGG integration such as MetaNetter 2 (Cytoscape plugin) and MetaMapR (R package) exist. The manuscript could benefit from clarifying what makes this approach unique.

      • Overall, the manuscript assumes a high level of knowledge. There are processes that go unexplained, such as the full extent of pre-processing accomplished in CAMERA and RAMclust, and why the Pearson’s correlation coefficients threshold was set to 0.6, etc. The pre-processing is extremely important for this technique to work due to the issues that were stated in the text. E.g. how is the difference between an isotope and a PMD determined and how do you differentiate between in-source fragments and neutral losses and the PMDs reported.

      • As it stands, self-loops in figure 1 are confusing and add a lot of visual clutter. Based on the source code, it appears that retention time is taken into account when defining peaks, so we are assuming what’s happening is two peaks with the same accurate mass have different retention times. However, this should be explicitly stated within the text.

      • In “Source appointment of unknown compounds”, the second paragraph is very difficult to understand. It sounds as if all compounds plotted are carcinogenic, but then “carcinogenic compounds were not connected by high frequency PMDs”? This then doesn’t seem to align with the next sentence discussing the average degree of connection, for which the values of 8.1 and 2.3 arealso not explained. The carcinogenic 1, 2A, and 2B could be briefly explained or perhaps just calling them level 1, level 2A etc. would help. In the same vein, the Figure 3 legend could benefit from changing labels from “Endogenous compound 2” to “Level 2 endogenous compound” or something else to clarify that it is referring to the toxicity level. Even then it is not sure if including that information is relevant to the figure.

      • The final example in “Biomarker Reactions” feels underwhelming in its current state. Even though it’s claimed to have a high significance, it is not convincing that the +2H mass shift is a significant biomarker when it’s such a common reaction. If this could be tied to a specific enzyme that has been implicated in lung cancer, or some other biological evidence to support this claim, it would be more convincing. Otherwise, it could be worth making networks based off of the biomarker metabolites found in the original publication e.g. NANA?

      • Figure 4 does not effectively communicate the significance of the data points as it is explained, the plots look very similar to the naked eye. Perhaps there is a statistical visualization that would make the point more clearly.
      • Finally, it might be worth adding a discussion regarding the resolving power needed and limitations. The described workflow seems to highly depend on the ability to accurately gather three decimal places. This will take a higher mass resolving as the molecular weight of the analytes of interest increase. It is unclear right now what the targeted mass ranges were for the measured compounds and what resolving power may have been used. Given that this is an experimental variable users can designate on an Orbitrap for instance, is there a recommended number or do the authors envision leaving this to the mass spectrometrist to define? Depending on the target audience this could greatly aid in implementation and general understanding. <br /> Minor:
      • The first sentence of the manuscript defines metabolomics using specifically an untargeted metabolomics definition. Some clarification of targeted vs untargeted or a focus on untargeted would make this clearer.

      • Methylation, oxidation, are common artefacts from the extraction process and analysis of biological samples. These are unavoidable facts of metabolomics, but perhaps the authors could comment on accounting for sample degradation processes.

      • As a proof-of-concept, we would have liked to see orthogonal identification for some molecules to prove that the molecules are related. An exact mass is only a “Level 5” identification (doi/10.1021/es5002105).

      • The two matrices might be clarified by being presented as tables or figures with abbreviations as an element of explanation. For instance, adding in “Ethylnitronate (S1), Oxygen (S2)” would help clarify and remove the necessity for the sentence starting in “For KEGG reaction R00025..”. The following sentence could be made into the table caption.

      • Use of the phrase “Topological structure” in the section “PMD Network Analysis” is confusing when it’s used in proximity with a compound’s chemical structure. It is unclear whether stating that chemicals with similar topological structure have similar biological activity refers to the topological properties of the network representation or if it is referring to the chemical structure itself. The reference to Figure 1 does not clarify this and either way this is a statement that requires further experimental or literature support.

      • Figure 2 is very low resolution and the yellow and peach colors are hard to make out. Overall we’d suggest changing edges to have a text reference to what reaction is being used as opposed to color. Addition of the chemical structures for TBBPA and some of the analogs into this figure would help to visually make the point that what you are seeing is a representation of molecular analogs. We also offer that the node color could be based on what has been confirmed in the previous study and what was newly annotated by this analysis to more clearly make the point that there is new information to be gleaned by running this analysis

      • Would it be possible to re-examine tandem data collected from the original paper to match fragmentation and confirm that the secondary network is related to the confirmed network?
    1. On 2020-05-20 12:39:54, user Crayfarmer wrote:

      There is no market for such a small crayfish except in developing countries. Marbled crayfish is on average considerably smaller than Procambarus clarkii. Therefore, culture of marbled crayfish in closed systems will never be profitable.

    1. On 2019-10-20 03:57:17, user David Acton wrote:

      A very interesting study that sheds some light on the cutaneous information that gates itch. However, more work needs to be done to discriminate between pre and postsynaptic effects, particularly with reference to GRPR+ neurons. I would also like to point out that animals were not shaved in the study by Acton et al., as stated in the discussion.

    1. On 2025-03-04 21:05:38, user Simone Picelli wrote:

      Hi, I think there is a mistake in the name of the company used to make the modified TSO. It's not Biosyn Corporation ( http://biosyncorp.com ), as you wrote, but rather Bio-Synthesis ( http://biosyn.com ). <br /> Moreover, in the TSO sequence: "/5Biosg/" is the acronym used by IDT for a 5' biotin. The "g" has nothing to do with deoxyguanosine (G), but you write in the paper "5BiosG/" and this can be confusing. The standard 10x TSO sequence is, in fact: 5’-AAGCAGTGGTATCAACGCAGAGTACATrGrGrG-3’<br /> so no G at the 5' (like there was never a G at the 5' of the SMART-seq oligo, from which 10x took their sequence).<br /> The code for biotin at Biosyn is [Btn] (standard C6 spacer, which I assume is the one you mean here).

    1. On 2016-07-08 18:14:40, user Hamed Seyed-allaei wrote:

      Nice job!

      I have a suggestion regarding Fig 4. This figure is the spotlight of your work. But it is noisy, especially at the tails. This is natural, because there are few highly cited works. This can be improved using one of the following methods:

      1. You can use logarithmic bins to construct the histograms: 0,1,2,4,8, ...
      2. You can use cumulative density/histogram instead.

      This reduces noises at the tails of the distributions so one can compares the performance of journals around highly cited works.

    1. On 2016-09-15 21:52:20, user Francisco De La Vega wrote:

      Please indicate the version of RTG tools that you used to compare varmatch with vcfeval. These tools are in active development and your timing and comparison results may change if you use a different version and thus the reader (and I assume the reviewers) need to know that.

    1. On 2024-11-15 07:55:21, user Giovanni Bussi wrote:

      Authors of the review

      Olivier Languin-Cattoën, Giovanni Bussi

      Summary

      The authors use Molecular Dynamics with enhanced sampling techniques to gain insight in the directional catch-bond mechanism of Vinculin tail (Vt) interaction with F-actin. They construct two models of the Vt-actin complex that are hypothesized to represent a weak state and a strong state in a force-activated allostery model of the catch bond. They use enhanced sampling techniques to estimate the free-energy landscape of the unbinding process in each state, as well as the unbinding kinetics, in absence and presence of pulling forces of variable intensities and directions along the actin filament axis. Their results demonstrate higher kinetic stability for the strong state with respect to the hypothesized weak one, with unbinding kinetics in range of experimental expectations, confirming the viability of a “3-state” (2 bound states, 4 unbinding pathways) kinetic model of the bidirectional catch bond observed in single-molecule experiments. They additionally observe an increase in bond lifetimes for moderate constant pulling force (10-20 pN) in both directions, indicating an intrinsic catch-bond behavior within each “allosteric” state that may superimpose to the overall allosteric one. They show how an external pulling force affects the positioning of the H1 ?-helix believed to act as a regulatory motif of the weak-to-strong transition, providing a compelling structural hypothesis for a force-induced allosteric mechanism. Finally, they provide molecular insight on the difference in stability between both states, highlighting the role of a C-terminal extension (CTE) and the redistribution of Vt-actin contacts under force.

      Comments

      * We wonder if the nomenclature “Holo” can be confusing at first glance for the reader, given the historical usage of the holo- and apo- prefixes to designate protein constructs with and without their constitutive prosthetic groups (usually non-proteic cofactors)

      * We suggest that the authors make clearer the composition of the Holo and Aligned protein sequences given the different numbering in 6UPW and 1QKR (that we guess is due to the presence of Metavinculin instead of Vinculin), that in our understanding are identical except for the absence of the leading H1 helix.

      * In FES calculations, since the constant force (that is, a linear bias) is applied on the same coordinate Q_?, we expect that the resulting FES could be entirely predicted from the FES at zero force by simple addition of the linear slope, given sufficient exploration of the Q_? direction during the OPES-MetaD sampling. This fact could be used by the authors to assess the consistency between the FES computed at different forces. Alternatively, one may want to first aggregate the OPES-MetaD simulations at all forces using appropriate reweighting, and then estimate minimum free-energy paths and free-energy barriers at arbitrary force using the aggregated FES. This approach might lead to a better statistical use of the vast amount of simulations and a smoother estimate of the FES at all forces within the studied range. Finally, the multiple trajectories (20 replicates x 9 force values) could be used in a single bootstrap to assess the statistical uncertainty of the results (see below).

      * Given the coarse nature of the set of chosen CVs (Q_? and Q_?) it is unclear whether the Vt is able to regain its canonical binding site during OPES-MetaD, notably because of free rotation with respect to the actin filament. <br /> - The authors acknowledge the difficulty in the methods (sec. 5.5) without explicitly stating whether such rebinding events happen at all in their simulations. We believe this is an important piece of information for proper understanding of the FES presented. We would suggest showing time series to clarify how many binding/unbinding events are observed.<br /> - One might expect that the absence of recrossing lead to a poor estimate of the free energy difference between the bound and unbound states as well as the height of the binding free energy barrier. On the bright side, the estimate of the unbinding barrier – which is the one they are the most interested in – can still be expected to be reliable.<br /> - The authors suggest to run multiple (20) separate OPES-MetaD simulations to compensate for this limitation. It should be acknowledged that independent runs starting from the bound state will not correct for the systematic bias caused by the absence of rebinding events. A bootstrap on these replicas would anyway estimate their statistical error.<br /> - We wonder if the use of the more specific CV Q_contact might allow for such recrossing to happen within OPES-MetaD, without the need of aggregating a high number of independent trajectories. In our understanding the authors only used Q_contact to assess the robustness of the free-energy barrier height to the precise choice of the projection space, but did not try to perform OPES-MetaD directly on this CV space, which could be instructive.

      * The authors analyze the FES by determining a minimum free-energy path using the “String method” as a post-processing method. <br /> - The Methods section might benefit from some information about the use of the method, in particular that it is directly applied on the 2D CV-space projected FES (as opposed to a search of a minimum energy path on the full potential energy surface as originally proposed in [50]), and provide details about initialization (choice of end points for the string, number of nodes, initial interpolation) and robustness to these parameters in the converged paths and corresponding barrier estimates.<br /> - Since the FES are aggregated from 20 independent OPES-MetaD runs, it might be relatively straightforward to estimate errors (for example using bootstrapping) and provide error bars on Fig 2c. We believe this would strengthen the significance of the observed barrier difference.

      * One may be concerned about the significance and reliability of the constructed “Aligned” state, since this state was constructed by aligning Vt to another conformation (in what we could refer to as “docking-by-homology”) with little experimental confirmation that such a state is stable in vitro. We understand that the model constitutes the core hypothesis of the whole computational approach, and that the consistency of the computational outcomes with single-molecule experiments themselves validates its plausibility. Nevertheless, it could be argued that lower binding affinity and lifetime are to be expected from a suboptimal binding partner in a suboptimal binding pose. This raises the question of whether the proposed model corresponds to a specific binding mode in reality, or if the results could be reproduced with a different alignment. Is this ruled out by the stability observed in the 500 ns simulations shown in Fig S1?

      * In Sec 3.2 §4, the authors say “these results [...] do not quantitatively explain the observed experimental results, since the experimental changes in lifetime shown in Fig. 1D reflect a net 1.4 kcal/mol change in barrier in the negative direction, and 0.6 kcal/mol in the positive direction (if one assumes a constant prefactor the kinetic rate constant)”. It was somewhat unclear to us where these values come from (Are they computed from the fitted 3-state model in SI S1? At a specific value of the pulling force?) and how exactly they are compared to the computed barriers for Holo and Aligned to conclude to a discrepancy (Overestimated?)

      * In Sec 3.4 §3, the authors convincingly remark that in two out of five simulations of Holo+H1 state pulled towards the barbed end, the conformation of H2–H5 becomes more similar to the Aligned (unbound Vt) structure, suggesting a first step in the strong -> weak allosteric transition. We wonder if (i) the specific contacts made with actin and (ii) the specific intra-domain contacts of H1 with the H2–H5 bundle are also indicative of a displacement toward the Aligned state, since this would be an even stronger argument validating the proposed model.

      * Given the relative simplicity of the supposed allosteric motif and the suggestive results of the Holo+H1 simulations, we cannot help but wonder whether the authors also tried to "unfold" the H1 helix in the Aligned model with a N-terminal pulling force since this seems a very natural test to look for equally suggestive indications of a weak -> strong allosteric transition under force.

      * Typos or writing remarks:<br /> - Fig 1B: The caption is inconsistent with the figure. In the caption, p1 denotes the COM of Vt helices H2–H5, p2 the COM of actin A1/A2 and p3 the COM of actin A4/A5. On the figure instead (p1, p2, p3) -> (p3, p1, p2).<br /> - Some repetitions that might be elegantly avoided<br /> x “capture the difficult-to-capture” (abstract)<br /> x “protein of interest [...] on our molecule of interest” (introduction §1)<br /> x “takes into account a Boltzmann weighted average over all possible configurations [...] a Boltzmann weighted average over all possible configurations” (introduction §4)<br /> - Typos<br /> x “FimH-manose” -> “FimH-mannose” (introduction §8)<br /> x “which is the the direction” (3.1 §1)<br /> x “These approximate one-dimensional free energy pathways also give us a way to define when the system has crossed into the unfolded state” -> Maybe the authors meant “unbound state” (3.1 §1)<br /> x “not all of the catch bond need come from” -> “need to come from” (3.2 §3)<br /> x “we note that these results are suggestive, they do not quantitatively” -> We wonder if the authors intended a formulation along the lines of: “we note that despite being suggestive, these results do not quantitatively” (3.2 §4)<br /> x “a constant prefactor the kinetic rate constant” -> “a constant prefactor for the kinetic rate constant” (3.2 §4)<br /> x “grafted to our Holo structure random orientation” -> “grafted to our Holo structure with a random orientation” (3.4 §2)<br /> x “TIP3 water” -> “TIP3P water” (5.1 §2)

      Acknowledgements

      This report was written after a journal club given by OLC in the bussilab group meeting. All the members of the group, including external guests, are acknowledged for participating in the discussion and providing feedback that was useful to prepare this report. The corresponding authors of the original manuscript were consulted before posting this report.

    1. On 2018-05-02 16:13:26, user Alan VanArsdale wrote:

      The record for Homo erectus now appears to be badly truncated. The dating here coincides with the timing of first appearances in the fossil record of Homo erectus in Eurasia and Africa, which likely was a major expansion from some unknown place for Homo erectus. During this expansion morphologies from encountered popualtions of Homo (with just one species of Homo ever existing at any one time), were picked up. There is no evidence in the fossil record of any lineages of Homo erectus being "dead end" morphologies. Instead it appears early appearances of Homo erectus in both Asia and Africa were morphologically African from the hip and below, and Asian above the neck, as intraspecific hybrids. .........................The best candidate for denisovans in the fossil record, and the best match morphologically for the known denisovan teeth, is Homo sapiens heidelbergensis, which is now known from Asia and South Asia (the cranium). The closest match morphologically for the trachiolus foot prints / track ways, reliably dated at about 5.7 mya, is Homo floresiensis (so H. floresiensis could have walked to Flores when last thought to have been connected to Asia about 5 mya). With Homo floresiensis being the closest known morphological match to whatever unknown Asiatic grades of Homo "erectus" contributed morphologies to AMH not seen (usually, except in a few early neandertal females), in African origins neandertals. Especially relatively small nasal bones and eye ridges, P4 relatively small compared to the molars, high domed heads, and presumably ancestral ARHGAP11A (which is thought to have enhanced intelligence but not led yet to increased brain size). .................................................. That populations such as Red Deer Cave people, Homo tsaichangensis and Homo floresiensis are late survivals needs to be allowed for. However, there is no evidence that as late survivors they in some way became genetically isolated from the single species existing in the genus Homo. Selective pressure not only maintains genetic diversity (as with neandertal genes as they enter Africa to be selected out there), they also maintain morphological diversity within interbreeding populations spread over great distances. With great morphological diversity, by about 1.9mya Homo was able to occupy diverse environments. Asia for the genus Homo long being more arboreal in morphology relative to Homo in Africa, on average, as reflected in lower body morphology when known. In Africa and Europe australopithicinae Western gorillinae and Pan, unlike in Asia, at first gave strong competition in all environments, and over time retreated more to arboreal environments limiting arboreal adaptations in Homo in Africa. Gigantopithicines (Asiatic gorillinae), may have been somewhat environmentally restricted in their competition with Homo and late surviving Lufengpithecus. ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''Nor is the Asiatic stream of morphology coming into AMH limited to a little less than 2 mya, it goes back at least 10mya, just it can not be seen with what is known in genetics back more than about 2mya (for now). The "remarkable" convergence of Homo tsaichangensis with Javanese Gigantopithecus is not convergence at all, this is shared primitive character states (from initial divergene of Homo and gorillinae about 9mya), just as the lingual groove of gigantopithecus is a shared primitive character state with orangs. And in modern humans (as was published in the 1952 paper), Gigantopithecus dental character states are seen, with highest frequencies and strength in those places where Gigantopithecus is known in the fossil record. This can seem incredible, to those who imagine typologically all hominins at some time are derived from just one morphology or holotype. However, this is not supported by the evidence in primates. Instead, it is supported that in hominin evolution there has at any time always been high morphological diversity. With morphological diversity usually being preserved in the phenotype (even if not seen in the spotty and intermittent fossil record), or sometimes hidden to be expressed later in the genotype.

    1. On 2018-11-02 03:56:36, user Stuart Cook wrote:

      Great study. The finding that IL-11 is specifically increased in activated fibroblasts in colitis and predicts resistance to anti-TNF therapy is consistent with a previous study (PMID: 19700435). Notably, OSM and IL-13 signalling - both also predicting response to anti-TNF therapy in this study - have an absolute requirement for IL-11 to stimulate fibroblast activation (PMID: 15699166, PMID: 29160304).

    1. On 2019-03-26 20:29:36, user Vincent Denef wrote:

      We read and discussed this preprint as part of an upper-level microbial ecology class at the University of Michigan (EEB 446, Winter 2019) that I am teaching and below I am posting some of the thoughts the students had after reading the preprint:

      1. General thoughts. Brito (2019) poses the question, “Do we exchange oral and gut commensals with our closest family and friends?” in order to understand the impact of routine interpersonal contacts in shaping the microbiome composition. Addressing this question is important because the gut microbiome is so impactful to the normal health of humans, any information about how it is affected is important and useful, although the students would have liked to see a more explicit explanation of how knowledge of transmission impacts how we understand how microbiomes are shaped, function, and affect human health. The structure of the study focused on isolated, non-industrialized communities. This enabled the authors to focus in on interpersonal interactions while reducing potential influences of external factors. However, it also makes it challenging to relate findings to other communities that are industrialized. While this is acknowledged in the study, they felt that this should be treated as a case-study and the data should not be used to draw conclusions between other populations and geographic regions.

      2. They had some thoughts regarding the authors’ definition of 'transmission'. Brito et al. loosely define transmission by shared inferred genotypes. Their work provides insight into the correlation of community patterns for individuals in a household or family unit. As it is difficult to determine the exact mechanism for transmission, the approach used allowed the authors to identify trends in oral and gut microbiome similarities across individuals without understanding how or why this might be. Yet, this does mean they can’t necessarily rule out similar environmental factors among close family members to lead to similar ecological selection rather than transmission, thus there is a risk of overinterpreting correlative data.

      3. Use of social network data. Some students had some suggestions regarding the methodology used for social network construction and wondered if other analyses of the network structure could have been added to gain deeper insights. Specifically, within the social networks constructed, simplified approaches of defining an individual and establishing a single connection and then utilizing that network for analysis is very broad in nature and only skims the surface with respect to extracting information from a social network. Understanding centrality measures of individuals within the village i.e., degree of individuals tied to, geodesic betweenness (how often is an individual on the shortest path to another individual), closeness of an individual (how easily can they reach other actors within the network), and eigenvector measures (how well-connected are individuals that an individual is connected to) would all have allowed for a stronger utilization of microbiome sample data for the usage of predictive models. Each of these different centrality measures come with an attributable value associated with the strength of centrality. After determination of centrality measure values for each individual, correlation of network centrality values and similarity in both oral and gut microbiome compositions could be measured.

      4. Ethical concerns. Student questions: Did the participants in this study give consent, and furthermore, did they have informed consent about the study that they were taking part in? There were also questions whether the exact form used to gain informed consent could be shared to preempt any of these concerns readers may have. Further questions they had were whether the participants in this study will benefit in any way from the knowledge obtained in this study? Also, one student group wondered whether knowing about the microbiota composition of certain populations could help drug companies target certain populations with certain products?

      5. Other methodological, interpretation, or presentation concerns. The students wondered why they inferred the amount of years couples were married based on the age of their oldest children. It’s interesting why they didn’t just ask the couple how long they had been married also it’s not always true that children are directly related to amount of time lived together. Another question related to the data availability section, where they didn’t quite understand why the authors discuss mislabeling of a sample in the database. Could they change the database to reflect this labeling issue?

    1. On 2017-01-11 20:21:34, user Stephen Van Hooser wrote:

      Question: is it certain the calcium activity in the bouton reflects only the presynaptic signals? If you patched a cortical neuron and fired it, is truly no signal observed in the presynaptic boutons? (One might imagine responses derived via presynaptic NMDA receptors, etc.)

    1. On 2020-01-31 22:02:47, user Dave Baltrus wrote:

      It is likely that the evolutionary relationships found between these two protein sequences of both viruses are due to a complete coincidence and, stepping back, do not appear "uncanny" to multiple experts that have also examined the sequences. In short, the authors base their analysis on a short sequence of the spike protein from 2019-nCoV, but a much more comprehensive search outside fo the viral sequences queried in the manuscript demonstrates that this sequence is also found in *many* *many* other places than HIV. Thus, while the 2019-nCoV strain does appear to have a sequence difference from other closely related viruses, there is not enough resolution to clearly demonstrate the evolutionary history of this change let alone trace it to HIV.

      see analysis here for instance: https://twitter.com/trvrb/s...

    1. On 2021-03-23 00:06:38, user Clara B Jones wrote:

      ... thinking of Ants, all of which are classified, Eusocial [e.g., see Holldobler & Wilson 1990] ... [1] are we going to accept the distinction between "primitively" and "advanced" eusocial? ... [2] among ant species, traits are highly variable, for example, with re: presence or absence of "castes;" patterns of task, role, and/or morphological specialization; &/or "totipotency;" ... [3] however, "reproductive division-of-labor" is a universal ... [4] since Cooperatively Breeding taxa exhibit [a] "reproductive division-of-labor;" [b] 1 or a few "pure" breeders; and, [c] "helpers," can we classify "cooperative breeders," "primitively" eusocial? ... [5] social mole-rats exhibit "reproductive division-of-labor;" "pure" breeders; totipotency; "helpers" [role specialization]; and, unless i am mistaken, "temporal division-of-labor" ["age polyethism:" Damaraland mole-rats] and are, generally, classified, "primitively" eusocial [eusociality including "reproductive division-of-labor;" totipotency; but without (more or less) "sterile casts" and, usually, without morphological specialization] ... how does this new report deviate from a classification, "primitively" eusocial for social mole-rats or from the highly variable traits reported for Ants?

    1. On 2025-10-04 19:58:19, user annonymous wrote:

      The authors claim that fitting a DDPM to a single MD dataset and subsequently generating samples from the trained model results in ‘enhanced sampling’. This claim is highly dubious as the results seem to indicate that the ‘enhanced sampling’ they refer to is equivalent to adding small amounts of guassian noise to samples already present in the MD training data. In fact, this result is expected - when generating samples from a DDPM, a simple prior distribution is iteratively transformed to a sample from the data distribution through noisey purturbations in the direction of maximum likelihood. Consequently, it comes as no surprise that generated samples are highly similar but not exactly identical to samples from the training data. Upon additional training of a DDPM on a single dataset, one expects that these deviations should asymtotically decrease until the DDPM ‘memorizes’ the training data and generate nearly exact copies of the training data. In the context of MD, adding gaussian noise to pre-existing samples from long-time MD is generally not considered a useful enhanced sampling method, unless noise perturbed structures are subsequently evaluated with a potential energy function and are subject to some aceptance criteria, as is done in metropolis hasting / MCMC sampling methods. I do not belive that the ‘enhanced sampling’ the authors claim to obtain from over-fitting DDPMs on single MD datasets is of the same nature as that expected from standard enhaced sampling methods for MD like replica exchange or metadynamics, which aim to explore completely new regions of phase space that are otherwise difficult to access and not yet characterized. The authors present no evidence that their procedure is able to generate samples that are substantially different than those already present in the MD training data - therefore, I would not consider this an enhanced sampling method in any sense. Moreover, the DDPMs presented here are trained to maximize the likelihood of generating samples that are similar to the training data distribution - there is no incentive for the model to explore new regions of phase space and one could argue that if their model were producing samples highly dissimilar to the traing data - it would suggest that the model is either under-fit or systematically incapable of appropriately modeling the training data.

    1. On 2020-11-09 21:31:18, user Clemantine wrote:

      Why would they use aborted fetal tissues lines to experiment with? Using any cell line after the 1947 Nuremberg code requires the informed consent of the Subject and the ability to withdraw from the experiment, both denied to aborted human babies. All cell lines derived after 1947 using aborted fetal tissue is immoral, unethical and illegal and must be discontinued!

    1. On 2023-03-01 11:05:33, user KS wrote:

      Dear author, <br /> I attempted to access PyCalibrate, but received an error message indicating that the processing frame on the web page failed to load. I attempted to resolve the issue by trying multiple browsers and devices, but without success.<br /> If you could kindly check the frame, it may resolve the issue. However, if the issue still persists, please let me know, and I would be happy to help you troubleshoot the issue further.<br /> Best,

    1. On 2025-10-21 03:59:01, user CDSL JHSPH wrote:

      Thanks for the very interesting preprint. I had a few questions:

      Since the analysis reuses public datasets, could upstream biases affect PCN estimates? Did you try any sensitivity checks?

      Many assemblies don’t include clear isolation/source info. If metadata are available, would stratifying by source (clinical vs environmental, host/body site) change the main patterns?

      Some taxa (e.g., E. coli/Enterobacterales) seem over-represented. Do the size–PCN trend and the ~2.5% DNA-load rule still hold after down-sampling or re-weighting?

      Do you plan a small wet-lab validation or tests in more distant taxa to see how broadly these rules generalize?

      Thanks again—really exciting direction!

    1. On 2016-12-30 09:57:32, user Alan Carter wrote:

      Good to see this reanalysis of the D4h3a ancient DNA . It is becoming clear that there was no no Beringia Holdover population, there is no, repeat no archeological data to support this - see Buvit 2016. I have spent the last 18 months looking at evidence for migration and depopulation in Siberia and Japan. I hypothesize that the Amerindian Homeland was Japan, and that it formed in Kanto Honshu between 21 and 16 kya. There were no further gene flows into Honshu and Hokkaido until 2300 years ago. This population served as a source population for both the recolonisation of Siberia via the Amur Valley and Trans Baikal from 22 cal kya and more rapidly from 16 kya and migration by boat to the Americas. This Kanto population was the source population from NE Asia to the Americas in a series of near continuous migrations. This dual migration to Siberia and the Americas from the same source population explains the long noted similaraties between Siberia and the Americas. They both came from the same homeland. The failure of the holdover model frees us to better interpret gene flow and reconciles the clear actual lithic archaeology as people migrated through time from Japan bringing their current lithics with them. Interestingly I was going to write to Brian K about this and this article stimulated this opening comment

    1. On 2024-09-22 21:30:29, user Christian Helker wrote:

      Beautiful work!!! :)<br /> I would like to bring to your attention our publication (“Apelin signaling drives vascular endothelial cells toward a pro-angiogenic state”; https://elifesciences.org/articles/55589) "https://elifesciences.org/articles/55589)") , which explores the function of Apelin on the vasculature. I believe it could provide additional context or complementary insights to your work.

    1. On 2018-06-12 14:48:10, user Ole Jørgen Benedictow wrote:

      This is all a consequence of not reading the studies on the behaviour of rats. Rats are cannibals, they eat sick fellow rats that cannot defend themselves more or less alive. When rats get ill or dying that hide away as best they can for this very good reason, as it is stated: they die in unusual and inaccessible places. This subject is commented on by all standard works on plague and are summarized and updated in Chapter 3 of my 2010 monograph on the alternative theories. See especially subchapters 'The question of the presence of Rats and the Methodological Fallacy of Inference ex silentio', and 'Ars Moriendi Rattorum: Where have all the Dead Rats Gone?, pp. 85-97. See also Chapter 8 in my 2016 monograph, pp. 395-451.I provide copies of Chapter 3 and 8 or parts of them for the orientation of those who wish to have a wider and less biased version of the history and life of rats.

      Kind regards Ole J. Benedictow<br /> o.j.benedictow@iakh.uio.no

    1. On 2020-11-10 10:05:17, user linguist wrote:

      No, the authors (the linguists among them) never make their data available, apart from an obscure table of +'s and -'s ... You have to take their word about their method and their accuracy. It's no surprise that most linguists don't.

    1. On 2023-06-23 04:35:02, user Stephanie Wankowicz wrote:

      The mineralocorticoid receptor forms higher-order oligomers upon DNA binding

      Summary:

      This paper aims to answer the question of the oligomeric states of the mineralocorticoid (MR) in the nucleus and when bound to DNA hormone response elements (HREs) in vivo. Using Number & Brightness (N&B) analysis, they investigate the oligomeric state of MR in the presence of different ligands and mutations/truncations to identify what controls different oligomeric states. While they comparisons they performed between different ligands and constructs of MR show qualitative differences, this paper is missing some key controls, particularly in the localization of the nucleus and MMTV array, which prevent us from thoroughly assessing the paper.

      Major Comments:

      1) Provide details and controls on identifying the nucleus versus cytoplasmic versus DNA binding/MMTV array. Only labeling these with the molecule of interest (MR) is inappropriate. To assess if MR is congregating at the MMTV or some other location in the nucleus, the MMTV array must be labeled with something other than GFP, allowing simultaneous visualization of the array and the MR oligomerization state.

      2) Explain the varying oligomerization states you observe across your dataset. Can you provide ranges of oligomerization states across your results? How should we interpret mixed populations? What were your criteria to decide whether a construct dimerizes, oligomerizes etc.

      3) The manuscript has varying points for each condition (for example, in Figure 1B, there are 490 single cells for one condition, with 36 single cells for another condition). Please explain why there is so much variety in the number of data points.

      Minor Comments:

      1) The introduction could be improved by expanding on details on the transcriptional crosstalk of MR/GR and the observations of GR at MMTV (and clarify this is the data the rest of this paper is compared to).

      2) Please clarify the construct of the cell line and if endogenous MR is knocked out.

      3) In Fig. 4 C, the MR-N579/GC-470C mutant array displays only 11 data points, while the figure legend says it contains 22.

      4) The figures with agonist or antagonist would be clearer if the agonist or antagonists were labeled.

      5) In the section ‘MR and GR do not share the same dimerization interfaces’. Please provide some context for the D-loop and P-loop. Figure 3A could be improved by showing where these are structurally or among the entire sequence.

      6) Please specify how many independent experiments were run for each condition.

      8) The authors describe that imaging happened 30min - 2h after ligand adding. Please specify what experiment was incubated with ligand and for how long. Is it possible that the signal is increasing proportionally with longer incubation times? A comparison in the Supplementary would be helpful.

      Reviewed by Stephanie Wankowicz, Lena Bergmann, and James Fraser (UCSF) <br /> 10.5281/zenodo.8072766

    1. On 2020-05-29 16:37:34, user Thomas Perkmann wrote:

      Dear authors,

      Many thanks for sharing this exciting work. In the publication, the negative samples of the specificity cohort display median values of 2.2 -2.4 AU/ml. In the manufacturer's IFU, there is a LOD of 3.8 AU/ml (i.e., the device does not give values below 3.8 AU/ml). How were these low values measured?

      Thanks for answering this question.

      Best regards Thomas Perkmann

    1. On 2020-03-25 19:33:23, user Rohit Satyam wrote:

      Hi Authors. <br /> Referring to line "We also used psRNATarget server to compare the predicted targets by the<br /> two methods"

      I am unable to understand why you have used a plant small RNA target analysis server, psRNATarget in your study?@COVID-19 is not a plant virus.

      I hope there are many differences in the prediction as mentioned https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3125753/

      "For example, an animal miRNA generally requires loose complementarity in about first eight nucleotides of the miRNA, while a plant miRNA demands the whole miRNA mature sequence to be near perfectly aligned with its mRNA target. Secondly, an animal miRNA tends to inhibit target gene’s expression at the translational level, whereas a plant miRNA directly cleaves its target transcript"

      That would make your predictions wrong.

    1. On 2021-12-09 20:59:29, user Siddhartha Joshi wrote:

      We recorded the activity of locus coeruleus (LC) and anterior cingulate cortical neurons in awake rhesus macaques. During passive fixation, ACC pairwise correlations tended to be reduced when baseline firing rate of LC neurons increased. But, when external events drove transient increases in LC activity, ACC pairwise correlations increased. Both relationships covaried with changes in pupil size. Therefore, modulation of coordinated cortical activity might result, at least in part, from ongoing,<br /> context-dependent, arousal-related changes in LC activity (- From the author).

    1. On 2021-03-06 17:47:29, user Clement Kent wrote:

      Thanks for a careful and thoughtful paper. After first reading, I see no reason to question the results or interpretations presented.

      I note several minor typos. Line 386 has GG>AT when GC>AT is meant. In Figures 3 and 4, you have what looks like an R-related blip: the Greek characters gamma and kappa have been replaced by an empty box. You must use the "expression" command to get correct use of special characters and math symbols in R plots - see for example https://stats.idre.ucla.edu.... Similarly in Fig 5 B, the text at top right reads r sub(S box W) rather than your intended r sub(S>W).

      You are cautious in your discussion of how differences in kappa and gamma may have arisen between simulans and melanogaster. You do mention GC methylation being low in Drosophila, but you don't discuss some recent evidence (e.g. Deshmukh et al 2018, PubMed 30002967) for dramatic differences between Drosophilia species in cytosine methylation. In particular, simulans and yakuba both were estimated as having ~50 times higher 5mC levels than melanogaster, which latter species stands out as an exception among 12 drosophilids tested (op. cit., Figure 2). Some discussion of this might be worthwhile. This presumably effects kappa because of known mutational mechanisms.

      The curious case of negative gamma for W>S in some bins is also stimulating. You did not discuss possible mechanisms for this. Have any been suggested in the literature? If low-GC introns are found in low recombination areas, then could interference or Hill Robertson effects from selection on exons which are after all only 8 bp away from the beginning of your SI introns have an effect? Did you at any point consider estimating various substitution rates as a function of position in the 8-30 bp region - perhaps as measured by distance of each bp from the nearest exon?

      I enjoyed this paper and hope to see it in its final form soon.

      Clement Kent<br /> Dept of Biology,<br /> York University, Toronto

    1. On 2019-01-28 10:32:45, user Marc Gf wrote:

      It is good to have a pathway-like graphical notation for rule-based modeling. The fact that the notation has a general view of a pathway combined with the fact that you can click on each specie to reach deeper insights of it, such as site-specific details and state patterns, provides the user with a powerful tool to sinthesize a huge range of knowledge. It may be useful in manny ways, to share some results in a understandable way, to have a visual support to check the errors while building a model...

      Nevertheless, as it happens with SBGN, there is information that this graphical notation systems cannot catch and there is some loss in the conversion to machine-readible formats. Do you think that with this notation, the loss when converting is improved? Do you think would it be possible to update this approach and incorporate some of this specifications in the reaction without creating a tedious graphical model?

      Marc.

    1. On 2023-06-03 14:55:56, user Andrew Borchert wrote:

      Very interesting and useful work. I am wondering: how do you reconcile your observation of a correlation between ATP and heat output with prior observations that heat shock itself can lead to an increase in ATP concentration for E. coli?

      https://microbialcellfactor...

      I think you touch on this with some of the mutant analysis, but I wonder if you can describe in more detail how you can distinguish between high ATP being the cause of increased heat output vs. higher ATP being in response to increased heat output?

    1. On 2025-06-13 13:20:50, user Anonymous wrote:

      Dear authors,<br /> as part of a group activity in our lab we discussed your very interesting manuscript with the goal of reviewing it as well as improving our reviewing skills. The below review is the result of this exercise and reflects thoughts and comments of several people. We hope this helps you with your way forward to publish the paper in a good journal.

      Summary, strengths and limitations of the paper<br /> The manuscript by Lee et al. investigates the mechanisms behind lysosomal damage in CLN4, a form of neuronal ceroid lipofuscinosis caused by dominant mutations in the DNAJC5 gene. The authors demonstrate that CLN4-associated DNAJC5 mutants aggregate on lysosomal membranes, leading to membrane disruption and severe lysosomal damage in neurons derived from human iPSCs and in a Drosophila disease model.<br /> In non-neuronal cells, a protective ubiquitin-dependent microautophagy pathway is activated, helping degrade these toxic aggregates and preventing lysotoxicity. Through CRISPR screens, the ubiquitin ligase CHIP (STUB1) was identified as a critical regulator of this pathway. CHIP facilitates the ubiquitination and lysosomal degradation of CLN4 aggregates, thus preserving lysosomal membrane integrity and preventing the lysosomal-driven cell toxicity.<br /> Importantly, overexpression of CHIP in CLN4 mutant neurons and flies restores lysosomal function, reduces lipofuscin accumulation, and rescues neurodegeneration, highlighting CHIP as a potential therapeutic target for CLN4 and, potentially, other lysosome-related neurodegenerative diseases.<br /> A strength of this study is its comprehensive mechanistic investigation into CLN4 disease, identifying lysosomal membrane damage as a key pathological feature and clarifying the still open question about how DNAJC5 aggregates cause neurodegeneration. In addition, the identification of the ubiquitin ligase CHIP as a key regulator of a protective microautophagy pathway represents a key discovery. CHIP-mediated ubiquitination of DNAJC5 aggregates enables their lysosomal degradation, effectively preserving lysosomal integrity. These findings are of important translational relevance, since CHIP overexpression restored lysosomal function and reduced neurodegeneration in both human neurons and flies, highlighting a promising therapeutic application.<br /> However, the study also displays some limitations. While the neuron-specific vulnerability to CLN4 aggregates is a central focus, the mechanistic basis for this selective sensitivity remains only partially explained. Additionally, the therapeutic relevance of CHIP modulation is based on genetic overexpression, which, while illustrative, does not yet translate to practical interventions such as small molecules or gene therapy strategies. The broad role of CHIP in cellular protein quality control also raises questions about potential off-target effects of systemic modulation. Despite these challenges, the paper makes a strong contribution to the field by establishing a mechanistic link between lysosomal membrane damage and CLN4 pathology and identifying CHIP-mediated microautophagy as a potential neuroprotective pathway.

      Major Comments<br /> 1. In Figure 1A, why do monomeric DNAJC5 levels change in the mutants? L116?HT seems to have comparable levels to WT, which is not the case for the other heterozygous mutant nor for the homozygous of the same mutation. Are the overall DNAJC5 levels changed in the different lines? Maybe testing by qPCR or checking the fully solubilized protein by WB can be options.<br /> 2. In Figure 1D, can the authors prove that the loss of lysotracker signal in day16 neurons is not simply because these cells are dying? Can they stain cells with calcein-AM as well?<br /> 3. In Figure 1L, why do they not find CHIP in the proteome? Based on figure 5A, they should find a difference in its levels between WT and L116? HM. Do they check the proteome at a timepoint that is too early, or are CHIP levels overall too low to pick up changes? Minor comment: in the text, they define a log fold change cut-off of 1.5. Please illustrate this in figure 1L.<br /> 4. In Extended Data Figure 2E, where does the HMW form of DNAJC5 fractionate? And does the organelles fraction change in mutants? It would be of help to see the fractionation of the mutant too, showing also the HMW DNAJC5. This will also help to understand why the authors see the downregulation of DNAJC5 in mutants in mass spec (Figure 1L). <br /> 5. The authors show that the lysotracker phenotype in mutants is likely not linked to V-ATPase dysfunction. However, it is not fully clear what is happening to V-ATPase. In Extended Data Figure 3A, the WB shows a decrease in the interaction between mutants FLAG-DNAJC5 and membrane-bound ATP6V1G2. What is the authors’ hypothesis of this phenotype?<br /> 6. In Figure 3, the authors conclude that ubiquitin, HGS and DNAJC5 colocalize on lysosomes. Can they add a lysosomal staining (e.g. LAMP1) to really prove this point and show the lysosomal localisation of mutants? And, more in general, the authors should include a colocalization analysis (e.g. Pearson’s everytime they claim it - Fig. 1H, 3A, 3C, 4F, 4H and 6C).<br /> 7. In Figure 3E,F, it seems that also the monomeric version of DNAJC5 accumulates inside lysosomes and this is impaired when microautophagy is blocked. Can the authors comment and expand in the result section about the WT phenotype? <br /> 8. In Figure 3H,I, the treatment with TAK-243 induces the reduction of lysotracker signal also in cells overexpressing the WT isoform. Why? The authors can include the quantification of untreated cells too. <br /> 9. In Figure 4 (A and B) and Extended data Fig.5, the authors employed CRISPR screens and identified CHIP as a candidate regulator and then they further supported this finding through KO and rescue experiments. The claims they made here can be sufficiently supported by the data they showed. However, one concern is the noticeable difference between the screening results of the WT and ?J conditions, as there are relatively few overlapping hits. What could explain this divergence? How feasible is it to use Keima-DNAJC5 with L116? for CRISPR screen instead of using DNAJC5 WT and ?J? Does the Keima-DNAJC5?J mutant have the same aggregation and/or lyso-toxicity phenotype as observed with the L116? mutation? Considering that both DNAJC5 WT and the ?J mutant are involved in misfolding-associated protein secretion (MAPS) and microautophagy (PMID: 35506243), but the ?J mutant lacks MAPS activity, is it appropriate to use the ?J mutant as a substitute for the L116? mutation? How is this choice justified in the context of the study?<br /> 10. In Figure 4D, is the observed leftward shift, particularly in case of sh-CHIP, substantial enough to confidently conclude that there is a decrease in the association of Keima-DNAJC5 WT with lysosomes? It would strengthen the claim if this was quantitatively assessed and supported by statistical analysis.<br /> 11. In Figure 4E, we would expect similar immunoprecipitation efficiency for all FLAG-tagged proteins using FLAG beads. The recruitment of the various FLAG-DNAJC5 constructs to the beads should be comparable—consistent with what is shown for FLAG-DNAJC5 WT, L115R, and L116?—in order to confidently conclude that the co-immunoprecipitation demonstrates CHIP can bind both WT DNAJC5 and the CLN4 mutants independently of the J domain. Alternatively, if transfection efficiency or expression levels of FLAG-DNAJC5 ?J present an issue, the protein level of FLAG-DNAJC5 ?J in the input should be provided to clarify this point.<br /> 12. In Figure 4F, from the representative confocal images, Ci-L116? mutant in CHIP-KO appears to be localized also on cell periphery or boundary along with punctate localization. Also, it would be better to show the status of ubiquitin and HGS staining in CHIP’KO cells without any over-expression of CLN4 mutants to appreciate the role of CHIP in microautophagy of CLN4 mutants.<br /> 13. In Figure 4G, I and K, the figure legends for the graphs do not clarify how the normalization of the Ub and HGS areas was done with respect to their untransfected (UT) cells. Did the authors use neighbouring untransfected cells from the same coverslip or did they use a common untransfected control for all the samples? Also, it would be more informative to add the untransfected column in the graphs shown in Fig. 4G and Fig.4I, similar to Fig.4K, to have a better comparison in the data.<br /> 14. In Figure 5, the overall rescue effect of CHIP in this system is weak. Maybe the fact that their promoter only activates from d8 onwards is part of the problem? Would it be possible to start expressing CHIP earlier?<br /> 15. In Figure 5A, the authors overinterpret their results and claim from only the fact that CHIP is in the NP40-insoluble fraction that it must be inactive. Could they check whether it really ends up in the HMW L116? aggregates, and maybe even perform an in vitro assay to determine its activity in either version?<br /> 16. In Figure 5G, the authors show increased cell death in immature neurons which lack the lysosomal damage phenotype. What is the authors’ explanation for this phenotype? Is it linked to CHIP aggregates accumulation?<br /> 17. In Figure 6, how do the different levels of lysosomal translocation make sense with their model? Shouldn’t the brain have the lowest level of translocation, since this is the only tissue where a phenotype occurs?<br /> 18. We would recommend moving Figure 7 to the extended data, and spend more time in the text to explain the relevance of Tsg101. Currently the figure comes a bit unexpected and does not allow the authors a strong finish to the paper, since the phenotypes are less convincing than the ones in Figure 6. In addition, is there any quantitative analysis of the rough eye phenotype that can give a more objective assessment for the phenotype?<br /> Minor comments<br /> ? In Figure 2F, the authors should also show the WT DNAJC5-treated cells. It will make the data more complete and solid, confirming that the WT isoform is not interfering with lysosomal homeostasis.<br /> ? In Figure 2H, in the L116?mono panel a control cell (intact) is missing. <br /> ? There are no supporting images for Figure 5H (also not in extended figure).<br /> ? In Extended Figure 6B and C, why does the WT go down too? Showing the graph like this is a little confusing, and also the normalisation.. and they should add also earlier time point to see if at d12 something is happening<br /> ? Try to avoid using red-green as a combination in figures, to make the paper accessible to colorblind people.<br /> ? Authors can homogenize how they show statistics in their graphs, either deciding to not show the p-value when it is not significant or to include it every time. Also, why do they often use n=2 and do statistics on individual data points? Why not add n=3 and do statistics on experiments?<br /> ? The authors claim a microautophagy-based system that cleans up the DNAJC5 aggregates, which end up inside lysosomes. However, if the aggregates can damage the lysosome membrane from outside, why would they not do the same from the inside?

    1. On 2020-02-03 17:15:55, user ncc wrote:

      Hi

      Nice setup, and well described. I enjoyed reading the paper. However, I disagree with the overall focus: that high-throughput, or obtaining the maximum number of replicates, is a desirable goal in respirometry.

      I have built similar IFT setups, as have *many* others. I would suggest the only really "innovative" aspect of this setup is that you are utilising the downtime during flushes to measure oxygen in different chambers. That is, getting maximum utility out of your 10 channels. However, this is only useful in **very** limited circumstances where the measurement period is comparable in length to the flush period. That is, species with very high metabolic rates and/or at high temperatures.

      However, i would question the entire practice of doing flushes so frequently if this is the case. It suggests to me your chambers are not large enough if the oxygen is being depleted so rapidly.

      High throughput should not be an end in and of itself if the resulting data are not representative of SMR or RMR. This is especially true of experiments where the specimen may be easily disturbed, as in fish respirometry. Are you absolutely sure your fish were not disturbed by the pumps coming on every 8 minutes, either via increased vibration, sensing the water has been changed, or changes to the water flow patterns? Is the 1 minute of data you exclude from the start of each measurement period sufficient time for the specimen to resume "normal" behaviour after a flush?

      I have recently run IFR flow experiments on a fish. These were on a temperate species, in a fairly large relative volume and took roughly 2-3h to show a decrease of around 10%, whereas a flush took 5 minutes. However, we found that for around 2h after a flush, the fish's metabolic rate was still decreasing, that is, it was still elevated and had not yet reached what could be defined as RMR, let alone SMR. As a result we decreased our replicates from 4x 2h replicates to to 2x 3/4h ones, and as a result got much more consistent data. In this case, high throughput, numerous replicates would not have given us a better estimate of RMR, in fact would have provided a much worse one. Every species is different, but i would 100% **always** choose fewer longer duration replicates, than numerous high-throughput replicates as described here.

      A few other points:

      There is NO fundamental difference between closed and IFR respirometry. IFR is simply having an apparatus that allows for multiple, sequential closed respirometry experiments to be run easily, minimising disturbance to the specimen. They are otherwise identical in nature. IFR respirometry is simply multiple closed respirometry experiments, and comes with *exactly* the same drawbacks that you suggest for "closed" respirometry. How important these are or if they are of no consequence at all depends on multiple factors in the experiment: the organism, water volume, duration, temperature etc, but most importantly the oxygen saturation level the experiment is allowed to reach. It is **completely incorrect** to say closed chamber respirometry is inherently associated with accumulation of nitrogenous waste and carbon dioxide, and increased stress, and that IFR is not. You can have these occur in both methods depending on how low long the experiment proceeds.

      The article you cite here (Snyder et al. 2016) is concerned with a completely different question, that of critical oxygen tensions, and the difference between *methods of inducing hypoxia*, either via degassing with nitrogen or via the animals own metabolism. This study is *not* a comparison of these two methods for determining SMR or RMR, but for determining hypoxia tolerance.

      I have run many "closed" respirometry experiments over long durations where oxygen decreased by only a few percent, and there was negligible build-up of waste or CO2. Given these experiments allowed specimens to be completely undisturbed for many hours, I would argue this is more likely to provide better estimates of SMR or RMR than any number of high-throughput, replicates that this or other IFR methods may produce.

      Whether or not to use closed or IFR methods is a mostly practical question, but fundamentally these methods are exactly the same.

      Other comments:

      • You mention no correction for tubing volume. The water volume of each experimental loop consists of the water in the chamber plus that in the tubing in the loop. If this was exactly the same for all chambers then that is an easy correction. However the fact that (according to your schematic) your recirculation pump was at one end of the apparatus suggests a possibility there might have been different lengths for the close chambers than the ones furthest away, which will cause a systemic error. Happy to hear otherwise, but either way it is a necessary correction (i don't see it mentioned in the R script either, but there the volume is 0.375 not 0.300, so maybe this is it?)

      • You also mention no correction for fish displacement volume. Your 300mL chamber does not contain 300mL once you put the fish in. The fish displaces some of the volume, and bigger fish will displace relatively more, so this leads to systemic error across body size ranges. Working from your data sheet, this is anything from 2-8% of the volume (assuming the fish are roughly neutrally buoyant) which would cause a misestimate of oxygen use, directly biased towards larger specimens. Your true "effective volume" is the chamber volume, plus tubing volume, minus fish volume.

      • There are at least two open-source software solutions for conducting and reporting respirometry analyses (full disclosure - i am developer of one of them) which you should mention:

      Harianto, J., Carey, N. & Byrne, M. respR -An R package for the manipulation and analysis of respirometry data. Methods Ecol. Evol. 10, 912–920 (2019).

      Morozov, S., McCairns, R. J. S. & Merilä, J. FishResp: R package and GUI application for analysis of aquatic respirometry data. Conserv. Physiol. 7, (2019).

      These allow investigators to report their analyses transparently and in reproducible form. Investigators who are skilled coders might choose to use their own workflows, but these are aimed at those who are not. I have another package with some utility functions: https://github.com/nicholas...

      Please do get in touch if this was useful. Happy to discuss these aspects more!

      Regards, Nick

    1. On 2016-03-17 19:29:25, user Fabien Campagne wrote:

      I disagree with the recommendation to use BioConductor as stated by the authors (section 3, page 11, frameworks). BioConductor is a great option in R, but it is not easy to obtain previous releases of BioConductor and the packages that it offers. If you need computational reproducibility, it is not trivial at all to obtain specific versions of a BioConductor environment. I recommend that the authors try to put their solutions to the test before recommending them. My group experienced many dependency installation issues with BioConductor, including the inability of the release servers to tag URLs with versions, so that even source code cannot be retrieved reliably in the future. <br /> We now routinely create docker images that contain R, BioConductor and a specific set of packages. This is the best way we found to achieve computational reproducibility with R.

    1. On 2020-07-29 13:23:01, user Jamie Carpenter wrote:

      This ensemble ML/AI method sounds really interesting as it appears to handle large multi-dimensional data by compressive-sensing-like stochastic sampling of subsets of manageable size. The reported convergence is very encouraging and hopefully this can be backed up with a rigorous mathematical derivation (e.g., upper bounds on bias, prevision, variances, information, etc.) I wonder if the code is available for community testing and independent validation.

    1. On 2021-10-07 19:41:10, user aquape wrote:

      Congratulations with this paper that beautifully explains *how* we lost our tail. The *why* is perhaps less difficult: Miocene Hominoidea were "aquarboreal" (aqua=water, arbor=tree) in swamp forests: they frequently waded bipedally with stretched legs, and climbed arms overhead in the branches above their head. Nasalis larvatus (proboscis monkeys) often wade upright in mangrove forests, and already evolved shortened tails. Aquarborealism also helps explain why we became much larger than monkeys, why hominoids are also called Latisternalia ("broad-breastboned ones"), why humans & apes have broad thorax & pelvis, with dorsal scapulas, lateral movements of arms & legs, and more centrally-placed vertebral spines (monkeys have narrow bodies, laterally-places scapulas, dorsally-placed spines etc.). See e.g. our Trends paper (TREE 17:212-217), google "Aquarboreal Ancestors".

    1. On 2015-05-24 02:44:16, user Matthew Kosak wrote:

      My question is regarding the methodology behind the paper, an "upstream" issue as to why the authors chose to select only certain genes such as the SLC...A5 and SLC...A2 as opposed to looking at many other genes that may have been available in the samples. A central working hypothesis is that these genes in question gave some advantage, that led to skin lightening and possibly greater Vitamin D production. The question is, how can other genes like bcl-2 and P53 genes be excluded as being extremely important, to "Eight thousand years of Nat Selection..." since these are critical to modulating cancer susceptibility (see Genta studies etc on cancer) and would be it seems, more activated when skin lost pigmentation? Would the risk of higher cancer rates not offset advantage of Vitamin D production? It is not a mutually exclusive issue, it is a matter of why as I ask above, the methodology does not require looking at these other critical genes in the skin, and their impact. So how can they be excluded from the study?

    1. On 2019-03-26 21:12:48, user Charles Warden wrote:

      Interesting study - it caught my eye that the impact factor was not significantly correlated with the overall reporting score ("?=-0.07, p=0.52; Figure 2C"). I think this is true, but I don't believe I've seen anybody show that before.

    1. On 2020-09-24 17:54:01, user Michael wrote:

      According to NYULH policy, when using data or tools generated in the core in publications, talks, or grant applications, please acknowledge the Microscopy Core at New York University Langone Health. <br /> Please amend the Acknowledgements accordingly.

    1. On 2020-10-26 11:44:57, user PlantGen Lab wrote:

      Dear authors,<br /> thank you for sharing your preprint on source-sink relationships in wild vs. cultivated rice and its impact on vegetative vs. reproductive growth. While discussing your manuscript in our journal club, we have noticed that the investigated wild species, O. australiensis, has a perennial growth habit. There are several studies describing differences in the source-sink balance between annual vs. perennial plants. Could you comment on how your presented results align with previous findings on annuals vs. perennials? In line, we were also wondering if you considered the root as major storage organ?

      We would gladly hear your view on this topic.

      Kind regards from the Plant Genetics lab at the Heinrich Heine University in Düsseldorf

    1. On 2021-07-13 03:19:08, user shenzheng mo wrote:

      The results are different from previous studies:Summersgill H, England H, Lopez-Castejon G, Lawrence CB, Luheshi NM, Pahle J, Mendes P, Brough D. Zinc depletion regulates the processing and secretion of IL-1?. Cell Death Dis. 2014 Jan 30;5(1):e1040. doi: 10.1038/cddis.2013.547. PMID: 24481454; PMCID: PMC4040701.

    1. On 2016-07-02 13:17:26, user Nicholas Sofroniew wrote:

      Hi Marius

      Great to see a preprint on your algorithm and your code up on github! I look forward to trying it out on my data. I had a few questions first though.

      For the analysis of multiplane imaging data are you doing any post-processing to ensure that you are not detecting the same neuron in multiple planes (such as looking at the cross correlation between rois at the same location in neighboring z planes)? Just briefly visually inspecting the data in figure 2 it looks like you might have quite a lot of double counted neurons (see my figure below). Did you exclude these from your estimate of >10,000 simultaneously recorded neurons?

      With this in mind, are you making any attempts to validate your algorithm against real ground-truth data (i.e. data where GCaMP activity has been recorded in neurons with a red nuclear marker, which enables easy automated segmentation)? If you cannot generate such data, there are some publicly available datasets that come close to that form at http://neurofinder.codeneur.... I would find analysis of such data much more informative than your analysis of the transplanted rois.

      I would also like to know more about how the choice of imaging parameters - pixels per um, frame rate, laser power (i.e. SNR), and duration of time session - effect the segmentation accuracy, (false positives, false negatives) of your algorithm. You chose to show data collected at 2.5 Hz over a ~900 x 930um FOV, with what looks like 512 lines and 512 pixels per line, for maybe 5 minutes. I would find it useful to know how the results of segmentation would have changed if you had changed these parameters (either by first acquiring higher resolution data and artificially down-sampling it, or by acquiring datasets with different imaging parameters and making comparisons across datasets)?

      I think such numbers and a comparison with real ground truth data would be a real benefit to the calcium imaging community.

      Thanks,<br /> Nicholas Sofroniew

    1. On 2017-10-23 18:13:09, user Peyton Lab wrote:

      Hi! we reviewed your paper in journal club and loved it. We had some comments that you might want to consider as you work on this paper:

      It’s not clear how B goes to C in figure 1. Can more explanation be given on which sections, or all of them, were used to make the simulations in C? Also, is it 10,000 runs of each of the graphs in B or 10,000 total?

      Some of the figure numbers appear to be missing. They are referenced in the text but don’t appear in the paper. Furthermore, the figures aren’t all shown.. figures go from 1, 2 — 6, — 8, 9, — 11.

      Figure 2: How would the model change if the inhibitors aren’t 100% efficacious? what happens if the inhibitors are only 80% potent, for instance. We think about these inhibitors not being 100% efficient when we use them experimentally.

      Figure 9: the colors in A don’t necessarily match those in B and C, which is confusing.

      Figure 11: titles needed above A and B - to explicitly show that PI3K is inhibited in A, and then that’s overriden via constitutively active MAPK. Is that regardless of ligand (growth factor) activation? Or just in the presence of PI3K inactivation? This could use some clarification.

      Suggested experiment: take a small set of patient data to construct a model with nodes that are constitutively active and see if you can predict the patient response to a specific RTK-inhibitor drug. Conversely, you could construct a model where that patient has known resistance to a drug, and then predict what follow up treatment they should get.

      On the last page: key experimental outcomes reproduced…. Paper could be much stronger if they made a figure out of those sentences.

    1. On 2021-02-20 19:59:03, user Ekaterina Shelest wrote:

      Some more remarks.The second one is the most important!

      1. It is not accurate to say that FunOrder is the firsttool based solely on genomic data: “first program giving a prediction about core genes in fungal BGCs based solely on genomic data.” CASSIS is purely genomic based, as is in fact antiSMASH, depending on what you call “genomic data”. <br /> Moreover, strictly speaking, FunOrder is NOT genomic-based. You do not use any genomic information. You use pre-selected protein sequences for blasting and then run some phylogenetic analysis.

      2. I just noticed an interesting mistake, which probably has led to many misunderstandings. It seems that you call all genes that are not involved directly in the biosynthesis, like TFs and transporters, “gap genes”. This is a huge mistake. The words “gap genes” are indeed in use, but they mean a different thing. They mean those genes that are completely unneeded for the production of the SM and essentially do not belong to the cluster, albeit they “sit” between cluster genes. In my previous comments, every time I used the words “gap genes” I meant exactly this: the genes that do not functionally belong to the cluster; they are usually not co-expressed with it. This does not refer to genes like TFs, transporters, tailoring enzymes, etc., because they are essential for the cluster function. No product will be produced without them. To illustrate, all genes marked with blue in Fig 1 are NOT gap genes; they are legitimate cluster members. <br /> I think this mistake clarifies a lot. You should understand that the genes you considered as dispensable and “non-essential” are same necessary for the cluster functioning as those that are directly involved in the synthesis. Regarding the cluster evolution, they can be<br /> expected to co-evolve with the other cluster genes with the same success.

    1. On 2020-01-24 09:13:52, user ani1977 wrote:

      Very timely publication! And thanks for releasing the data :) I see the genome https://www.ncbi.nlm.nih.go... based on mapping as far as i could read the M&M, wondering if de-novo assembly was also performed? Otherwise the read shared generously seem to be there at http://virological.org/t/pr... and I can give it a go... BTW why HeLa for "Determination of virus infectivity" (Fig. 4) as we think it may not be good system for it given that we have shown antiviral response just with mock transfection https://www.sciencedirect.c...

    1. On 2022-04-07 20:30:32, user Robert Turner wrote:

      I'm delighted that your <br /> group is pursuing the very important goal of characterizing cortical <br /> micro-architecture in vivo. The paper you sent is quite well-written, <br /> yet I find it puzzling in several areas. I hope<br /> you will find these comments helpful as you prepare it further for full<br /> publication, and in your next work.

      1) References in the Introduction.

      I was surprised to see no mention of the work of:

      a) Turner, Oros-Peusquens et al (2008), who were able to reliably image <br /> the stria of Gennari in several volunteers, with nearly isotropic voxels<br /> (0.4x0.4x0.5) mm3 at 3T, using an IR-TSE sequence. While you mentioned <br /> the slightly earlier work of Barbier, it<br /> is obvious that isotropic voxels with 0.5 mm resolution or smaller are <br /> essential for characterization of microstructure, and it was the Turner <br /> paper that pioneered this breakthrough.

      b) Trampel, Ott and Turner (2011), who actually used ultra-high <br /> resolution (0.5 mm isotropic) 7T structural MRI to address an important <br /> neuroscientific and clinical question--the extent to which congenital <br /> blindness alters the structure of the visual cortex.<br /> This paper, on its own, contradicts the current paper's statement: <br /> "However, in vivo mesoscopic MRI has not advanced beyond the <br /> proof-of-concept stage, and has not been incorporated into the toolkit <br /> of practicing neuroscientists." Indeed there are other recent<br /> papers which use structural 7T MRI at high resolution to discover new <br /> knowledge about brain organization.

      c) Bazin, Dinse et al (2014) and Waehnert, Dinse et al (2016) which <br /> present a complete suite of image processing tools that can "optimally <br /> process mesoscopic imaging data." These tools, largely created by <br /> Pierre-Louis Bazin and including equivolume cortical<br /> layering, have already been used widely in some groundbreaking studies,<br /> for example Gau et al, Elife 2020. If your group found good reason not <br /> to use these tools, for instance preferring to segment your images <br /> manually, it would help the community to explain<br /> why.

      It might therefore be a good idea--more courteous and accurate--to tone <br /> down some of the claims of novelty made in this Introduction section.

      2) Remarks about layer structure in primary visual cortex.

      You comment (end of Section 3) that "It can be seen that there are lower<br /> T2* values around the middle of the cortical thickness. This structure <br /> is likely the stria of Gennari...". Of course it is the Stria of <br /> Gennari. Many researchers have now compared myelin-stained<br /> cadaver brain sections with ex vivo and in vivo MRI scans of primary <br /> visual cortex. The increased myelin density and higher iron content in <br /> the Stria of Gennari significantly reduce T1 and T2*, and this is <br /> unquestionably the source of the line in an MRI scan<br /> with sufficient spatial resolution, whether qT1, qT2*, phase imaging or<br /> simply T1w. No further explanation is needed! The Stueber et al paper <br /> of 2014 (not cited here) is quite conclusive.

      A further comment. The Stria of Gennari in your T1 maps (Figure 6 of <br /> your paper) shows up quite poorly. Indeed, there is hardly a decrease in<br /> T1 to be seen in the middle of the cortex, especially in the average <br /> along the cortical plane.

      It has become a familiar observation from published papers (such as Duyn<br /> et al) that the Stria shows up more clearly and sharply in T2*-weighted<br /> images than it does in MP2RAGE T1 maps with the same nominal spatial <br /> resolution. It was clear to me several years<br /> ago that this effect was probably due to the MRI sequence, rather than<br /> any anatomical subtlety. Iron-stained sections of primary visual cortex<br /> show a thickness of the Stria very similar to that seen in myelin <br /> stained sections, with a similar increased myelin<br /> and iron density towards the white matter. The image sharpness issue <br /> seems to be the point spread function of the MP2RAGE sequence. Because <br /> each of the long train of echoes is actually recorded at a different <br /> inversion time, the point spread is convolved with<br /> the recovery curve of the longitudinal magnetization, and is thus <br /> broadened. It was to circumvent this problem that I devised the <br /> Multi-Shot Multi-Slice Inversion Recovery EPI sequence, now implemented <br /> brilliantly by Rosa Sanchez-Panchuelo and colleagues at<br /> Nottingham. Here each of the EPI acquisition windows is short in <br /> duration compared with T1, and the broadening is much reduced. You can <br /> see this in Figure 8 of our 2021 paper (attached), where our MS-IR-EPI <br /> T1 maps show a much sharper Stria. Fabrizio Fasano<br /> and I demonstrated this at last year's ISMRM using a gel phantom with a<br /> sharp boundary between two gels with different T1s.

      I would recommend this sequence to anyone interested in quantitative mapping of cortical myelin at high resolution.

      3) In Section 3.4.2 your paper states: "T1 contrast is also known to be <br /> related to myelination and therefore used for delineating areal borders <br /> (Cohen-Adad et al., 2012; Deistung et al., 2013; Dick et al., 2012; <br /> Haast et al., 2016; Marques et al., 2017). While<br /> there have been efforts to acquire mesoscopic resolution T1 and <br /> T1-weighted images in the past (Federau & Gallichan, 2016; Lüsebrink<br /> et al., 2021; Lüsebrink et al., 2017), there has not yet been a <br /> quantitative T1 dataset together with T2* at mesoscopic resolution<br /> in the living human brain."

      Yes, indeed, T1 contrast is related to myelination. There are several <br /> papers (e.g. Leuze 2017, Morawski 2018) showing that if CLARITY is used <br /> to clear the myelin from cadaver brain, T1 contrast completely <br /> disappears. Could you put this first line a little more<br /> strongly, perhaps?

      The first paper to argue that quantitative T1 maps should be the most <br /> accurate in vivo guide for cortical parcellation was actually Geyer et <br /> al (2011, attached), describing results shown at the OHBM meeting in <br /> 2010, which then in fact inspired David van Essen<br /> and Matt Glasser to attempt their own parcellation of the cortex, <br /> partly based on the arbitrary ratio of the image intensities of <br /> T1-weighted MP-RAGE images and TSE images (also mostly inversely T1 <br /> weighted, but inaccurately denoted 'T2-weighted' images).<br /> In the attached Geyer paper you can find a reasonably complete summary <br /> of previous related work.

      4) At the beginning of Section 4.2 you state: "However, as argued within<br /> (Wallace et al.,2016), mesoscopic in vivo imaging may still be <br /> insufficient to capture the subtle changes in myeloarchitecture aside <br /> from primary visual cortex where the stria of Gennari<br /> is extremely thick." Perhaps you have missed the papers by Skeide <br /> (2018) showing hypermyelination of left auditory cortex in dyslexic <br /> individuals, and Kuehn (2017) showing subtle variations in myelination <br /> of BA3b relating to somatosensory fields.

      5) One last comment--have you tried denoising your images? With luck, <br /> you might gain a factor of 3 in SNR, and they would look more <br /> convincing.

    1. On 2017-12-05 18:27:57, user Ben Berman wrote:

      In Extended Figure 1, "heterochromatin" and "early replication timing" seem to go in the same direction for breakpoints. This is surprising, since these two categories are generally the inverse of each other (heterochromatin is late replicating). Any idea why?

    1. On 2020-06-16 03:50:27, user Virginia Abdala wrote:

      Nice work! Please note that R.W Haines is also author of the paper of 1942: The evolution of epiphyses and of endochondral bone. Biological Review 174, 267–292. You should change J.S by R. W.

    1. On 2019-10-07 21:40:58, user John Mosher wrote:

      Hi Olaf, nice meeting you last week at the workshop. As you and I briefly discussed, our paper

      Mosher, J. C., Spencer, M. E., Leahy, R. M., & Lewis, P. S. (1993). "Error bounds for EEG and MEG dipole source localization." Electroencephalography and clinical Neurophysiology, 86(5), 303-321.

      discusses the Cramer-Rao lower bound applied to dipole localization error. The CRLB is the best (lowest covariance error) that any unbiased estimator can achieve in the presence of noise, regardless of the actual estimation procedure, so its great for trade-off comparisons. Our paper discusses MEG, EEG, combined EEG and MEG, and one and two dipole sources, for several different array configurations and dipole orientations. We also compare some of our analytical calculations with a 5,000 iteration Monte Carlo to confirm some of the basic variance.

      As compared with your approach, ours emphasized location error and amplitude error of the dipole, rather than the point spread function and imaging resolution. As you note, it's a complex interplay of parameters. I hope our approach can contribute to yours.

      -- John

    1. On 2019-02-02 16:44:04, user Donald R. Forsdyke wrote:

      Since the term “panmictic” is in the title of this paper, the authors might consider outlining its historical roots dating back to the work of Weismann and Romanes, where panmixia is equated with “cessation of selection,” namely that natural selection is not operating. If natural selection were operating then the chance of an individual crossing with a member of the selected population would either be increased (if selection were positive) or decreased (if selection were negative). This cannot occur when there is true panmixia.

      In Chapter 4 of his 1897 masterpiece Darwin, and After Darwin. III. Post-Darwinian Questions: Isolation and Physiological Selection, Romanes discusses this in detail, arriving at a conclusion similar to that of the present authors. Thus, as they state, there “evolve barriers to genetic exchange, which act to prevent a continuous increase in diversity by enhancing genetic drift. Or as they otherwise put it: “this diversity acted to generate barriers to recombination, either directly, or via selective pressure to reduce recombination rates between genetically divergent lineages.” Romanes’ “physiological selection” is a process that incorporates the “number of mechanisms” to which they refer.

    1. On 2022-11-05 00:31:14, user René Janssen wrote:

      A very well written paper by experts on this field of bird and insect migration studies.

      What I miss in the discussion is the foraging and migration of bats (mostly nightly, but also by daytime) that could give false signals. I think it would be improve the paper to add some sentence to this problem.

      Again: thanks for the well written paper and great research.

      René Janssen<br /> The Netherlands

    1. On 2018-07-12 19:06:49, user Lewis Bartlett wrote:

      Great fundamental work! We did something of a similar vein a few years ago using a different stochastic ecosystem model (train based) to try and tease apart habitat loss and habitat fragmentation per se:

      http://rspb.royalsocietypub...

      A lot of the results seem to agree well (which is great because our model was far less tractable than the one employed here) - especially that the negative effects of fragmentation manifest much more strongly for smaller absolute habitat areas. Might be worth saying that your disagreement with the habitat amount hypothesis is supported by these other modelling approaches too (looks like the mounting case from these different studies is getting pretty strong!).

    1. On 2020-05-13 21:27:26, user Bruce Conklin wrote:

      Great study by @FaranakFattahi, it will be important to see if antiadrogenic drugs can alter the course of COVID-19. It also could explain why pubescent people (AKA kids) seem protected from many of the deadly effects of COVID-19!

    1. On 2020-07-06 14:10:38, user odin wrote:

      I think this paper should be discussed in the recent paper: Diogo, R. (2020). Cranial or postcranial-dual origin of the pectoral appendage of vertebrates combining the fin-fold and gill-arch theories?. Developmental Dynamics.

    1. On 2021-05-11 02:45:34, user Vera Arenas wrote:

      I really enjoyed this paper and feel that it has some really important real-world applications, especially when testing using the MEK inhibitor was done. A major strength of this paper was that there was a clear logic to all of the experiments and conclusions drawn were all well-explained. In addition, the paper was of a good length and included all the necessary details. I have a few suggestions on how this paper could be improved for the future. Firstly, I think it would be a good idea to include at least 1 E-cad knock-out cell-line (either MDA-MB-468 or MC57) in experiments beyond Figure 1 in addition to the experiments done with E-cad knock-in cell-line MDA-MB-231 to rule out any potential differences. This is especially true for the inhibitor experiments, where it is a possibility that the knock-in vs. knock-out E-cad cell lines could have different responses. In addition, for Figure 2 specifically, a lot of the writing was crowded and hard to read, it would be helpful if the figures could be larger for clarity. Lastly, I think that it might be a good idea to consider extending the timeline of the extravasation assay to minimize the possibility that the tunable E-cad or E-cad+ cells do show signs of extravasation that may just take longer to show. Aside from those edits, this was an excellent read!

    1. On 2023-11-03 15:51:53, user Corresponding Author wrote:

      We - the authors of this manuscript - appreciate a Community Review of this manuscript posted here: https://zenodo.org/records/.... We agree with the overall assessment of the reviewers.<br /> 1) For the method description, we have cited previous publications and mentioned ‘as described previously’. Based on the reviewers' suggestion we will further describe the methods in detail to clarify the reviewers' concerns. In addition, we will include the age and sexes of mice in the legends of each figure. We will upload a revised version of this manuscript in a few months. eLife journal will publish the manuscript.<br /> 2) We agree with the reviewers that additional experiments are necessary for in-depth analyses of how elevated glycosuria increases compensatory glucose production. The goal of this project was to provide a foundation for future studies that will be informed by the list of secreted proteins identified using plasma proteomics, some of them may be correlative and others causal. At this time, it is not feasible to test each of the identified protein for its causal role in enhancing a compensatory glucose production. <br /> 3) eLife will publish a revised version of this manuscript in a few weeks.

    1. On 2025-02-20 19:02:49, user Raoul wrote:

      There is a previous report that has targeted a disease resistance gene to generate plants with enhance resistance. Similar to what is said in this pre-print ("SNC1 is an attractive target for proof-of-principle modulation of disease resistance by epigenome engineering").<br /> Reference: CRISPRa-mediated transcriptional activation of the SlPR-1 gene in edited tomato plants<br /> Plant Sci, 329 (2023), Article 111617, 10.1016/j.plantsci.2023.111617<br /> Recently a review article has mentioned that: "One notable example of enhancing disease resistance in crops involved the CRISPR activation (CRISPRa) system to activate the defense gene PATHOGENESIS-RELATED GENE 1 gene (SlPR-1) conferring enhanced resistance to Clavibacter michiganensis subsp. michiganensis infection in tomatoes" (taken from: https://doi.org/10.1016/j.pbi.2024.102669 ).<br /> Consequently, the concept has shown to be scientifically and technically feasible, as shown previously in 10.1016/j.plantsci.2023.111617.<br /> Thus, what is stated in this preprint is not really new, for plants: "The results demonstrate that epigenome-engineering of a single defense gene, SNC1, is sufficient to generate plants with improved disease resistance phenotypes."

    1. On 2023-12-15 00:42:07, user Cristy Mendoza wrote:

      Hi. I found your work to be fascinating and very relevant due to frequent antibiotic resistance occurring with many different bacteria. The importance of the work was very well emphasized. However, there were parts of the paper that were confusing and restricted my ability to understand the conclusion of the work performed. Below are a few suggestions that I hope you take into consideration:

      • Besides a few experiments, the statistical analysis tests were not listed in the paper. It is highly significant the test that is being performed is well known to the audience so that they can interpret how the data's significance was gathered.
      • In Figure 3, there are significant stars on the graphs, yet no test is listed for the audience to know. Additionally, I am still unaware of what is being compared in these figures and what the significance ultimately represents.
      • Presenting Figure 7 earlier in the paper and fully describing the xenophagy pathway that is proposed before LC3 and Bafilomycin, for example, are introduced in experiments will be very helpful. Because there was little to no explanation of LC3 and Bafilomycin in the paper, I initially did not understand why they were tested in the experiments.
      • Carry out more experiments that prove the xenophagy pathway to be true. For example, in Figure 7, mTOR is shown to be in the pathway, yet no tests were performed to make sure this aligns with the theory.
      • Avoid using similar controls to statistically compare it to many experiments carried out, such as Figure 1. This is because the more statistical tests that are run using the same control for the different treatments, there is a higher chance that one may result significant out of chance. What would be suggested would be carrying out control experiments for each treatment group.
      • The sample sizes are never given for experiments. To rely on the data and that there is not too little power, it would be very helpful to know the sample sizes of experiments.
      • Labeling is preferred to be consistent. For example, if "Baf" is used to indicate Bafilomycin, that abbreviation should be used to refer to Bafilomycin in all figures.<br /> This paper is very interesting and has the potential to go further as it is very important to understand how and why bacteria can resist antibiotics. I wish you all the best with the paper!
    1. On 2017-10-30 20:57:46, user N.M. Shahir wrote:

      Fascinating paper! Two questions though; 1) I'm curious why you didn't compare your results to DESeq2? and 2) I'm curious as to why you didn't also look into batch effect in alpha diversity measures?

      Best,<br /> N

    1. On 2017-11-20 17:39:07, user Craig Kaplan wrote:

      This paper is truly excellent- very much appreciate the careful and comprehensive approach. I am wondering if the authors were aware of this recent, relevant work from the Becksei group, supporting the observation of much shorter half-lives, and examining correlations among previous approaches for mRNA decay : http://advances.sciencemag....

    1. On 2020-04-02 21:09:56, user Sinai Immunol Review Project wrote:

      Potent human neutralizing antibodies elicited 1 by SARS-CoV-2 infection

      Ju et al. 2020

      Keywords: monoclonal antibodies, neutralization, antibody cross-reactivity, Receptor Binding Domain

      Summary

      In this study the authors report the affinity, cross reactivity (with SARS-CoV and MERS-CoV virus) and viral neutralization capacity of 206 monoclonal antibodies engineered from isolated IgG memory B cells of patients suffering from SARS-CoV-2 infection in Wuhan, China. All patients but one recovered from disease. Interestingly, the patient that did not recover had less SARS-CoV-2 specific B cells circulating compared to other patients.

      Plasma from all patients reacted to trimeric Spike proteins from SARS-CoV-2, SARS-CoV and MERS-CoV but no HIV BG505 trimer. Furthermore, plasma from patients recognized the receptor binding domain (RBD) from SARS-CoV-2 but had little to no cross-reactivity against the RBD of related viruses SARS-CoV and MERS-CoV, suggesting significant differences between the RBDs of the different viruses. Negligible levels of cross-neutralization using pseudoviruses bearing Spike proteins of SARS-CoV-2, SARS-CoV or MERS-CoV, were observed, corroborating the ELISA cross-reactivity assays on the RBDs.

      SARS-CoV-2 RBD specific B cells constituted 0.005-0.065% of the total B cell population and 0.023-0.329% of the memory subpopulation. SARS-CoV specific IgG memory B cells were single cell sorted to sequence the antibody genes that were subsequently expressed as recombinant IgG1 antibodies. From this library, 206 antibodies with different binding capacities were obtained. No discernible patterns of VH usage were found in the 206 antibodies suggesting immunologically distinct responses to the infection. Nevertheless, most high-binding antibodies were derived by clonal expansion. Further analyses in one of the patient derived clones, showed that the antibodies from three different timepoints did not group together in phylogenetic analysis, suggesting selection during early infection.

      Using surface plasmon resonance (SPR) 13 antibodies were found to have 10-8 tp 10-9 dissociation constants (Kd). Of the 13 antibodies, two showed 98-99% blocking of SARS-CoV-2 RBD-ACE2 receptor binding in competition assays. Thus, low Kd values alone did not predict ACE2 competing capacities. Consistent with competition assays the two antibodies that show high ACE2 blocking (P2C-2F6 and P2C-1F11) were the most capable of neutralizing pseudoviruses bearing SARS-CoV-2 spike protein (IC50 of 0.06 and 0.03 µg/mL, respectively). Finally, using SPR the neutralizing antibodies were found to recognize both overlapping and distinct epitopes of the RBD of SARS-CoV-2.

      Caveats

      Relatively low number of patients

      No significant conclusion can be drawn about the possible correlation between humoral response and disease severity

      In vitro Cytopathic Effect Assay (CPE) for neutralization activity

      Huh7 cells were used in neutralization assays with pseudoviruses, and they may not entirely mimic what happens in the upper respiratory tract

      CPE assay is not quantitative

      Duplicated panel in Figure 4C reported (has been fixed in version 2)

      Importance of findings

      This paper offers an explanation as to why previously isolated antibodies against SARS-CoV do not effectively block SARS-CoV-2. Also, it offers important insight into the development of humoral responses at various time points during the first weeks of the disease in small but clinically diverse group of patients. Furthermore, it provides valuable information and well characterized antibody candidates for the development of a recombinant antibody treatment for SARS-CoV-2. Nevertheless, it also shows that plasmapheresis might have variability in its effectiveness, depending on the donor’s antibody repertoire at the time of donation.

      Review by Jovani Catalan-Dibene as part of a project by students, postdocs and faculty at the Immunology Institute of the Icahn school of medicine, Mount Sinai.

    1. On 2014-08-26 14:55:10, user Guest wrote:

      Yes, an extremely interesting paper.

      And I find it fascinating that an almost complete mtDNA NumtS has been found in the Algerian sequence HDGP01275.

      But what is the Haplogroup ? <br /> And, I think it a missed opportunity that the authors have not determined this.

      Unfortunately, the GenBank sequences KM281512-34 have not, as yet, been made available; but once the details of the NumtS are published it should be fairly easy to find the Haplogroup and make a suggestion as to the age of the NumtS directly from this.

      On another point, I would like to point out that the authors have not directly referred to:<br /> Herrnstadt C, Clevenger W, Ghosh SS, Anderson C, Fahy E, Miller S, Howell N, Davis RE.<br /> "A Novel Mitochondrial DNA-like Sequence in the Human Nuclear Genome."<br /> Genomics. 1999 Aug 15;60(1):67-77.<br /> and it is unclear as to what their studies have revealed about this prominent NumtS of fairly recent origin. Is it one of the ones they are going to submit to GenBank ?

      Also, the authors have not discussed the very old NumtS that are common to the Human, Chimpanzee and Rhesus Monkey.<br /> (see perhaps my paper at: http://www.jogg.info/51/ind... )<br /> and shown that their computer program is capable of identifying them.

    1. On 2016-08-25 02:19:55, user Russ Poldrack wrote:

      This is a really interesting and thoughtful piece that will be important reading for anyone in the field of cognitive neuroscience. I have a few comments that I hope will help make it clearer and more accurate.

      • "BOLD response may spillover 3 to 5 millimetres away from neural activity because the brain supplies blood to adjacent areas — it “water[s] the entire garden for the sake of one thirsty flower”" - This is mixing together a couple of issues. It's true that the hemodynamic response is broader than the neuronal activation, but not by 3-5 mm. The “flower-watering” effect is probably on the order of hundreds of microns. The substantial spread in standard (i.e. 3T gradient-echo BOLD) fMRI is due primarily to the fact that this imaging technique has substantial contributions from venous signals that can spread fairly far from the neuronal activation.

      • "Extraneous to the actual imaging itself, most statical models require some spatial smoothing in addition to the smoothing that is intrinsic to fMRI data acquisition.” - misspelling of statistical. also, I would disagree with this claim - it is increasingly common to analyze data without any smoothing, especially when one is not relying upon Gaussian random field theory.

      • "Neural similarity is not recoverable by fMRI under a burstiness coding scheme.” - this seems to rely on the strong assumption that burstiness is just like regular firing, only with a different temporal organization. this is far outside my knowledge base, but I can imagine that differences in the synaptic physiology of bursting vs. constant firing might be evident from BOLD. Also, see this regarding synchrony: http://www.mitpressjournals...

      • The general conclusions seem to rest heavily on the specific deep networks used in this analysis, which are trained on the categorization problem. Thus, it’s not surprising that the high-level representations show less overlap between categories - the training has worked! However, it’s not clear to me how well categorization training approximates what mammals learn as they come to perceive the world. It would be useful to have additional discussion regarding the impact of this particuclar topic on the generality of the conclusions.

    1. On 2021-11-19 13:27:22, user UAB BPJC wrote:

      We (the Bacterial Pathogenesis and Physiology Journal Club at the University of Alabama at Birmingham) read this manuscript this week with great interest. Our compiled comments are listed below. We hope the authors will find them helpful.

      Introduction<br /> 1) The authors make the claim that “While several hundred ISGs with various known functions have been identified, IFN has primarily been studied in its role in orchestrating anti-viral immunity. The role of IFN signaling in response to bacterial products, and how this may influence immune homeostasis in particular, is poorly understood.” There is a great deal of literature about the role of IFN signaling in non-viral responses, including bacteria (some of which the authors then go on to discuss). Several reviews in the recent years have collected this data in a way that gives a more complete understanding, including Gutierrez et al who seem to have published data in 2020 describing a mechanistic pathway by which beneficial bacteria activate Type I IFN signalling [1-4]. Perhaps the authors had a specific instance in mind (such as a mechanism, a specific type of response, or specific T-reg response), but in saying the role of IFN signaling in response to bacterial products is poorly understood in general dismisses a great body of work in the field.<br /> 2) The use of “tonic signaling” “tonic IFN expression”, and “basal IFN expression” is a little confusing. Consider clarifying what is meant by “tonic” and whether it is different from “basal” expression of IFN. <br /> 3) The final sentence in the authors’ introduction seems to be reversed, in that their data suggests that commensal microbiota promotes intestinal homeostasis via type I IFN signaling, whereas they say that type I IFN signaling promotes homeostasis via commensal microbiota.

      Results<br /> 1) The authors discuss the expression of IfnB and Mx1 in their germ-free/monocolonized/specific pathogen-free experiment. Why is Mx1 important? What is it? Later on the authors identify it as an IFN-induced gene, but best practice would be to do so as part of the rational behind the experiment, rather then waiting until later to explain its significance. <br /> 2) Sample size irregularity and lack of error bars makes Figure 1A difficult to believe. <br /> 3) The “specific pathogen-free” mouse description is questionable for several reasons. Firstly, what pathogen is lacking? This is not addressed in the paper. Secondly, how were these mice developed? Were they developed by colonizing germ-free mice with a cocktail of microbes minus a specific one? Germ-free mice have many issues with immunological development that may skew or complicate the data, including issues in innate and adaptive immune cell development. In the methods the authors say they were ordered from Jacksons Laboratory, but there is no stock number given for these mice and a basic search does not return results that are “specific pathogen-free”.<br /> 4) In Figure 1A, there is no unmanipulated positive control (ideally a non-germ free WT mouse) for comparison. While the Specific Pathogen Free samples are a good indicator, they are still a manipulated strain. The authors would benefit from having a non-germ free WT mouse line as a control, especially considering the immunological developmental issues in a germfree mouse.<br /> 5) For Figure 1B, the Y axis is labeled mIFNb (pg/ml). For consistency with Figure 2B, the axis should be labeled “IFN? (pg/mL)”.<br /> 6) In Figure 1C there is no description of how the authors ensured only CD11c+ cells were being screened from the lamina propria tissue isolation. There is no described enrichment step in the paper, nor an isolation method. Additionally, the methods do not list a CD11c antibody in the flow cytometry list, which makes it difficult to interpret if the flow cytometry results of the pSTAT1 expression is gated off a CD11c+ population, a different population (such as CD4+ T cells), or total cells.<br /> 7) For Figure 2, the authors title the figure “B. fragilis induces IFN? expression in dendritic cells to coordinate Treg response”, but nothing in the figure discusses CD4+ cells, let alone Tregs. This figure specifically demonstrates that culturing with B. fragilis induces IFN? expression and downstream STAT1 phosphorylation in dendritic cells. While this may be involved in Treg development/activation, the data presented in no way demonstrates a direct connection between B. fragilis and Treg responses. Later on, the authors demonstrate this result, but in this figure the data does not support the claim made by the title.<br /> 8) From Figure 3 on, the authors no longer use the GF cells in their experiments, which is a disappointment, as they had such a district deficit in type I IFN signaling. Using the IFNAR-/- mice accomplish the effect of preventing type I IFN signaling but doing the same experiments using BMDCs from GF mice with and without a B. fragilis pulse would be interesting and would perhaps strengthen the argument that the commensal bacteria are important in both priming and driving type I IFN signaling. <br /> 9) For figure 3A, the axis is confusing, as the total population is not clear – is it 10% of all cells in the well are CD4+, Foxp3, and IL10 positive? Is it 10% of all CD4+ Foxp3+ T cells are IL-10+? If the axis was renamed to be more in-line with the text, that would help clear up the message of the figure. The text indicates that you are discussing the % of Tregs that are producing IL-10, which seems most reasonable, but the current axis could suggest that it’s 10% of all cells in the culture, and the figure legend suggests that the y axis represents the % of CD4 T cells in the culture that are Foxp3+ IL-10+. <br /> 10) For Figure 3C, it seems as though this should be a figure by itself that comes before Figure 3, or at the very least be Figure 3B, because the claim of Figure 3 is demonstrated in the current Figure 3B, which shows that IFNAR signaling in BMDCs is required for IL-10 production in Tregs. The current figure 3C shows the effect of losing IFNAR signaling in DCs alone, and should therefore go before the effect of this loss in DCs on Tregs. By changing the arrangement of figures the story flows more cleanly: B. fragilis treatment of DCs drastically increases their ability to trigger IL-10 production in Treg cultures > Loss of IFNAR signaling in BMDCs drastically affects the expression of many IFN-regulated genes and eliminates the effect of B. fragilis treatment > The loss of IFNAR signaling also impairs the ability of DCs to trigger IL10 production in Tregs, regardless of B. fragilis treatment. Conclusion: B. fragilis primes DCs to trigger IL-10 production in Tregs in an IFNAR-dependent manner.<br /> 11) Also for Figure 3 in its entirety, the DCs used in this experiment (according to the methods) are IFNAR1-/-, while in the text and in the figure they are listed as “IFNAR-/-“. They still have IFNAR2 and this should be noted. <br /> 12) For Figure 4B, a more detailed explanation of how the authors developed this analysis and what it is intending to show needs to be provided. There is next to no explanation of this particular result, only what the authors take it to mean. There’s no explanation of what the parameters of tSNE1 and tSNE2 are, or why the MLN seems to have a cluster of BF cells in the lower left region while the cLP has them disbursed. Indeed, the text suggests that both the MSN and cLP have BF cells clustered, but the cLP plot shows a disbursement of these cells in all the regions… In all this is a confusing figure that doesn’t really add anything to the paper without clarification as to what it is supposed to be showing.<br /> 13) For Figure 4C, the genes need to be listed in the same order for effective comparison between the two tissues. At a glance, it appears that MLN and cLP cells have a highly similar expression pattern… however, the genes are not the same in these two datasets. BP treated MLN cells have Oas2 as the most upregulated gene while BP treated cLP cells have Ifit3 as the most upregulated gene. Looking at the figure as is now would suggest that the two populations are fairly similar, but in reality there are several genes that are differentially expressed between.<br /> 14) Also in Figure 4C, the gene set offered is a very small subset of the type I interferon responding gene family. While a small set of this subset are differentially expressed, what is the significance overall? This dataset needs more gene expression data to show a more complete picture and justify the claim that bacterial colonization induces type I IFN signatures in intestinal Tregs.

      Overarching Comments<br /> 1) The general conclusion of this paper is that type I IFN signaling in DCs, induced by commensal bacteria, is essential for Treg activation:<br /> a. From the summary: “Bacteroides fragilis induced type I IFN response in dendritic cells (DCs) and this pathway is necessary for the induction of IL-10-producing Foxp3+ regulatory T cells (Tregs).” <br /> b. From the Introduction: “Notably, B. fragilis induced IFN? and type I IFN signaling in dendritic cells (DCs) are required for commensal induced Foxp3+ Treg responses”<br /> c. From the Results: “Thus, type I IFN signaling in DCs is critical for commensal bacteria to direct Treg responses, even when IFN signaling is intact in T cells.”<br /> However, Figure 3B shows that while it is important for activation, these T cells are still activated and IL-10 production is still triggered at substantially higher levels over the untreated controls. Essential would suggest that the inability to perform this signaling would completely inhibit the DCs’ ability to trigger IL-10 production, or at the very least bring the expression level of IL-10 down closer to untreated controls.

      2) This paper represents a good first pass of the data, but the authors need to reevaluate the extent of their claims. There are several experiments that need to be either repeated with higher sample sizes (Figure 1A for example) or re-evaluated for a less broad interpretation (Figure 3B).

      3) Figure colors should be reworked to make the differences more distinct. In Figure 1, for example, it is difficult to tell that the Bf samples are blue while the SPF samples are black. The RNA-seq data colors make it difficult to compare differences in expression in the middle of the spectrum (Yellow is different from blue, but blue-green is difficult to detect from green-blue).

      4) In general, the authors show convincing data for commensal bacteria playing a role in this type I IFN – DC – Treg process. However, there are two major issues with the authors’ interpretations. The first is that they only show priming with commensal bacteria is necessary for these effects – maintenance is not discussed. Secondly, the use of words like “essential”, “necessary”, “inhibit”, and “required” are not appropriate in many conclusions, such as the title of Figure 3. While the lack of IFNAR1 signaling impairs IL-10 production, it does not inhibit it. There is a reduction but not a loss of function.

      Summary Response:<br /> The authors make a good effort in unraveling a complicated mechanism of commensal microbes’ effects on host immunity. The authors present a good deal of convincing data that show that commensal bacteria effect the ability of dendritic cells to trigger Treg IL10 expression. A more rigorous investigation into the mechanism of this phenotype is warranted, however, as the data does not show this activity to be essential the Treg activation. <br /> From the data presented, the authors are safe in arguing that commensal bacteria like B. fragilis prime dendritic cells, making them more sensitive to type I interferon signaling and more capable of inducing type I interferon signaling in a manner that more effectively drives Treg activation (as measured by IL10 production). Additional experiments to measure other factors of Treg activity would bolster the authors’ claims. <br /> 1. Ma, Y. et al. (2020) The Roles of Type I Interferon in Co-infections With Parasites and Viruses, Bacteria, or Other Parasites. Front Immunol 11, 1805.<br /> 2. Kim, B.H. et al. (2011) A family of IFN-gamma-inducible 65-kD GTPases protects against bacterial infection. Science 332 (6030), 717-21.<br /> 3. Gottschalk, R.A. et al. (2019) IFN-mediated negative feedback supports bacteria class-specific macrophage inflammatory responses. Elife 8.<br /> 4. Gutierrez-Merino, J. et al. (2020) Beneficial bacteria activate type-I interferon production via the intracellular cytosolic sensors STING and MAVS. Gut Microbes 11 (4), 771-788.

    1. On 2020-08-18 06:20:49, user Yishai wrote:

      Unfortunately, this paper's claim seems to be an artifact. We have used the protocol described and indeed get similar-looking cells. However, RNA-seq revealed that they were, in no way, neuronal cells - rather than remained monocytes.

    1. On 2018-06-14 16:29:05, user Barbara Koenig wrote:

      Very exciting and innovative method - it will allow to open plenty of new approaches to study complex traits that are based on social interactions in rather "natural" groups of mice. The method goes much beyond what is currently available for unsupervised tracking of not only social interactions but also body postures and movements - all that in incredible details. Will be great to see the method being applied to various questions and topics where individual phenotyping is a must.<br /> Barbara Koenig, University of Zurich

    1. On 2021-09-20 04:52:35, user Cyrille Delley wrote:

      Hi Vincent and Simone,<br /> Thanks for sharing this interesting preprint. I was wondering, since you are using the TSO and pT primer during the PCR, wouldn't that potentially cause your TSO primers to introduce new UMIs during each PCR cycle and thereby inflate your read counts? Having a constant spacer would presumably increase this effect. Am I missing something here?

      Best,<br /> Cyrille

    1. On 2025-07-07 13:33:52, user Christoph Guschlbauer wrote:

      None of our work cited in various places in this preprint (i.e., Zakotnik et al. 2006, Guschlbauer et al. 2007, Page et al. 2008, Hooper et al. 2009, Hooper 2012, Ache and Matheson 2012, Blümel et al. 2012, Ache and Matheson 2013, von Twickel et al. 2019, and Guschlbauer et al. 2022) claims or implies that passive forces could be sufficient to support the weight of an insect or any animal. To claim or suggest otherwise (as done in lines 33-35) is incorrect and sets up a misleading straw man that misrepresents our work. All statements in the preprint regarding our work related to this specific matter need to be removed or edited accordingly. For instance, the investigations, calculations, and interpretations in Hooper et al. 2009 are solely about limbs that are not being used in stance or other loaded tasks (indeed, the article's title specifically refers to "unloaded" leg posture and movements). Trying to use this work to predict whether passive muscle forces alone can support a stick insect against gravity requires considering much more than the oversimplified calculation given in lines 290-292. Other “back of the envelope calculations” (lines 299-300) are likely also insufficient and erroneous. The discussion in lines 289-304 needs to be edited accordingly.

      We contacted the corresponding author first on May 12, 2025, and once more on June 09, 2025, to explain our concerns in detail and to ask for the preprint to be revised accordingly so that our work is not misrepresented in the public domain.

      Scott L. Hooper, Christoph Guschlbauer, Ansgar Büschges, and Tom Matheson

    1. On 2020-05-27 20:08:58, user Andrés Morales wrote:

      Nice work and very useful protocol.

      There is one point that you might want to revise. In your manuscript, you mention that "other reports from in situ analysis that reported 27.5% binucleation". However, in our studies of liver tissue, we found that around 75% of hepatocytes are binucleated - in total agreement with your study. You might be interested in having a look at our manuscripts to have some quantitative comparison of the morphological parameters of different cellular and sub-cellular components of (mouse and human) liver tissue. We reconstructed liver tissue sections ~100 um thick:

      https://elifesciences.org/a... (Morales-Navarrete H., el at..A versatile pipeline for<br /> the multi-scale digital reconstruction and quantitative analysis of 3D tissue architecture.Elife, 2015)

      https://elifesciences.org/a... (Morales-Navarrete H. el at. Liquid-crystal organization of liver tissue. eLIFE. 8:e44860, 2019)

      https://www.nature.com/arti... (Segovia-Miranda F., et al. Three-dimensional spatially resolved geometrical and functional models of human liver tissue reveal new aspects of NAFLD progression. Nature Medicine. 25 (12), 1885- 1893, 2019)

    1. On 2020-06-05 19:42:24, user Alexandra Beliavskaia wrote:

      Dear authors, the preprint text mentions supplementary data, but there is no supplementary data linked to the preprint itself. Would you be so kind to point me to where one can find it? Thank you!

    1. On 2020-07-02 20:30:49, user Paul Gordon wrote:

      Thanks for posting this. I tried to find CNP0001111 in the sequence database pointed to in the manuscript, but there are no matching records. Is the data under embargo, or was there a typo? Thanks for any clarification you can provide.

    1. On 2017-01-26 00:12:21, user German Dziebel wrote:

      My coverage of this paper is at http://anthropogenesis.kins.... The review contains a couple of clarifying questions for the authors. First, what's your interpretation of the worldwide distribution of EDAR gene that codes for a number of traits including dental shoveling which you believe diffused from Asia to Africa. Second, how do you explain the fact that Amerindians have a special connection to West Eurasians (as seen in whole-genome analyses, Mal'ta and Kostenki aDNA and in the sharing of Y-DNA P clade that's not attested in Ust-Ishim aDNA) that's not shared by East Asians

    1. On 2017-10-18 13:02:13, user Camilo Libedinsky wrote:

      Hi, very nice piece of work. I have a question about the 10 clusters in Fig. 3. Would you also see 10 clusters if you trained on less than 20 tasks (say, 15)? In other words, does the number of clusters plateau at some point? or keeps on increasing with number of tasks trained?

    1. On 2019-05-17 09:40:35, user Wouter De Coster wrote:

      Dear authors,

      Thank you for your interesting article. I would like to point you to an article which is worth discussing in this context: https://www.sciencedirect.c... <br /> Admittedly, I don't know much about machine learning but I am very enthusiastic about its application in large datasets in the context of genetics. However it seems that a better AUC is obtained using a more straightforward regression approach.

      Regards,<br /> Wouter De Coster

    1. On 2018-11-15 15:13:42, user BU_FALL_BI598_G5 wrote:

      Critical review #2 Cell-type specific D1 dopamine receptor modulation of projection neurons and interneurons in the prefrontal cortex<br /> Paul G. Anastasiades, Christina Boada & Adam G. Carter*<br /> Group 5- Amber Shang, Joseph Sisto, Simran Shah

      Overview

      Dopamine (DA) modulation in the prefrontal frontal cortex (PFC) has profound implications in its functionality and physiology, and can therefore influence cognitive and reward-related behaviors. This DA input has been correlated with functions such as working memory and attention, and its dysregulation could lead to neuropsychiatric disorders such as schizophrenia. Despite its importance, DA receptor expressions at pyramidal neurons and interneurons remain unknown. Out of all the subtypes of DA receptors in the PFC, D1 receptors (D1-Rs or DRD1s) are the most abundant and their functions are most highlighted for PFC-dependent behaviors. However, there is currently little understanding, even conflicting reports on which projection neuron population, interneuron and pyramidal subtypes express D1-Rs to collectively modulate PFC outputs.

      In hopes to characterize the D1-R expression and its DA circuitry in the mouse PFC, more specifically the prelimbic PFC, Anastasiades and coauthors combined ex vivo electrophysiology, in situ hybridization and viral tracers in multiple transgenic mouse lines to selectively target different populations of neurons in the PFC. The authors were able to determine that D1-Rs are found in subsets of intra-telencephalic (cortico-cortical) neurons and VIP+ interneurons, and can further selectively enhance their AP firing.

      Overall the authors did an excellent job explaining the motives behind their study, using concise language throughout the paper and logically retracing each step of the experiment. They utilized various viral tracers such as AAV-synaptoTag and AAVretro-Cre-mCherry to map neuronal projections. Moreover, they used either heterozygous D1-tdTomato mice, or heterozygous D1-tdTomato mice crossed with either homozygous GAD-Cre, PV-Cre, SOM-Cre, VIP-Cre or heterozygous 5HT3a-Cre mice to produce interneuron specific mice and then injected AAV-FLEX-EGFP into the PFC of each mouse line to label the inhibitory neurons. (results section). The authors further categorized neuron subtypes based on their electrophysiological properties and finally looked at the roles of D1-Rs using D1-R antagonist/agonists. However, the methods and results presented here merit some comments and unresolved questions/concerns.

      Major Criticisms

      First, the title of the article Cell-type specific D1 dopamine receptor modulation of projection neurons and interneurons in the prefrontal cortex could be misleading because it implies D1 is the only gene that defines the cells. Although the authors continues to explain the different dopamine receptor subtypes in the introduction section and why they focused on D1-Rs, it would be appreciated if the title could better reflect the content.

      Second, the group utilizes in-situ hybridization (figure 1), which uses proteases to break down the tissue. There is a possibility that this could be not only too harsh on the tissues but also the probes can bind to the nuclei. Therefore, we suggest the authors show a confirmation of the healthy tissue and potentially use DAPI staining to verify that proteases bind to mRNA, not to the nucleus. Furthermore, it would be appreciated if the group showed a negative control group to verify that the Td-tomato mRNA probes correctly obtained overlap with the D1+ neurons in the mice. One way to achieve this is to probe D1-R KO mice with the Td-tomato probes in order to observe no overlap.

      Third, in figure 3, it would be appreciated if the group showed additional parameters regarding the D1+ and D1- neurons’ morphology and physiology in order to verify a difference in structure between the two populations. For example, total dendritic length, maximum branch order, total number of branches, total number of branch points and/or sholl analysis can be included to further signify a difference between D1+ and D1- neuron populations. Additionally, current clamp was performed in both figure 3 and 9. However the output was not specifically quantified. We suggest instead of using one pulse, the authors could use increasing pulses to draw an input-output curve for better quantification in order to control for spikes caused by artifacts.

      Fourth, in figure 4, it is not clear which region of the PFC received the injection. This could be problematic because depending on which part of the PFC has the most injections, for example prelimbic PFC, infralimbic PFC etc., the observed projections will be different. Therefore we suggest the group quantify their injection sites with coordinates and hot spots and observe to what extent the injection has spread. It will then be possible to determine which section of the PFC is more selectively targeted. In addition, the injection site may have been biased.

      Minor Criticisms

      We suggest the authors reformat the article for the convenience of reading.

    1. On 2019-11-26 14:48:46, user Rob Moran wrote:

      Interesting study! It's particularly interesting that a ColV plasmid is contributing to virulence and antibiotic resistance in ST101. It sounds like (lines 255-256) the resistance gene region in pEC121.B might be derived from RR1, which we've described previously (<br /> doi: 10.1089/mdr.2017.0177). If so, this represents further dissemination of this plasmid lineage.

    1. On 2023-11-09 15:17:53, user Bertram Klinger wrote:

      Thank you for the nice explanation of expectation maximisation.

      However, in my eyes your algorithm does not get rid of the spillover signal. <br /> In Fig3C the correlated distribution is the result of spillover from channel Yb172 into Yb173, as can be seen nicely in Fig3D where this correlation vanishes with the same antibody labeled to a channel which Yb172 does not spill into (Sm147D). Instead your algorithm seems to only set low signals to NA.

      To undermine this point, Fig1a shows that the spill-in signal from Yb172 into the Yb173 channel is on average 2.7. Assuming the the mean of Yb172 bead to be of similar strength as Yb173 (~6.2) then for a cell population without Yb173 we would expect a difference of roughly 3.5 (in log scale) between the two channels if purely driven by spillover. Which is what can be seen in Fig3C for the CD3-low population ( i.e. they do not express CD3).