Peer Review History
| Original SubmissionMay 26, 2025 |
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Dear Dr. Long, Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process. Please submit your revised manuscript by Oct 31 2025 11:59PM. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org . When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file.
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Thank you for stating in your Funding Statement: “This study was supported by the National Traditional Chinese Medicine Expert Inheritance Studio Construction Project (Document No. [2022] 75 from the National Administration of Traditional Chinese Medicine), and the Scientific Research Plan Project of the Health Commission of Hunan Province (Grant No. C202303078160).” Please provide an amended statement that declares *all* the funding or sources of support (whether external or internal to your organization) received during this study, as detailed online in our guide for authors at http://journals.plos.org/plosone/s/submit-now. Please also include the statement “There was no additional external funding received for this study.” in your updated Funding Statement. Please include your amended Funding Statement within your cover letter. We will change the online submission form on your behalf. 4. Thank you for stating the following financial disclosure: “This study was supported by the National Traditional Chinese Medicine Expert Inheritance Studio Construction Project (Document No. [2022] 75 from the National Administration of Traditional Chinese Medicine), and the Scientific Research Plan Project of the Health Commission of Hunan Province (Grant No. C202303078160).” Please state what role the funders took in the study. If the funders had no role, please state: "The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript." If this statement is not correct you must amend it as needed. Please include this amended Role of Funder statement in your cover letter; we will change the online submission form on your behalf. 5. PLOS requires an ORCID iD for the corresponding author in Editorial Manager on papers submitted after December 6th, 2016. 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Please note that funding information should not appear in the Acknowledgments section or other areas of your manuscript. We will only publish funding information present in the Funding Statement section of the online submission form. Please remove any funding-related text from the manuscript and let us know how you would like to update your Funding Statement. Currently, your Funding Statement reads as follows: “This study was supported by the National Traditional Chinese Medicine Expert Inheritance Studio Construction Project (Document No. [2022] 75 from the National Administration of Traditional Chinese Medicine), and the Scientific Research Plan Project of the Health Commission of Hunan Province (Grant No. C202303078160).” Please include your amended statements within your cover letter; we will change the online submission form on your behalf. 7. If the reviewer comments include a recommendation to cite specific previously published works, please review and evaluate these publications to determine whether they are relevant and should be cited. There is no requirement to cite these works unless the editor has indicated otherwise. 8. Please review your reference list to ensure that it is complete and correct. If you have cited papers that have been retracted, please include the rationale for doing so in the manuscript text, or remove these references and replace them with relevant current references. Any changes to the reference list should be mentioned in the rebuttal letter that accompanies your revised manuscript. If you need to cite a retracted article, indicate the article’s retracted status in the References list and also include a citation and full reference for the retraction notice. [Note: HTML markup is below. Please do not edit.] Reviewers' comments: Reviewer's Responses to Questions Comments to the Author 1. Is the manuscript technically sound, and do the data support the conclusions? Reviewer #1: Yes Reviewer #2: Yes ********** 2. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: I Don't Know ********** 3. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #2: Yes ********** 4. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes ********** Reviewer #1: This manuscript explores shared molecular links between lipid-metabolism dysregulation, sepsis, and atrial fibrillation (AF) using public transcriptomic datasets, differential expression, WGCNA, multiple ML feature-selection strategies, immune-cell deconvolution, single-cell context, and drug-repurposing enrichment. CD81, CKAP4, and DPEP2 emerge as convergent hub genes with promising discriminative performance in held-out datasets. The cross-disease angle is timely, and the multi-modal analytic approach is a strength. The work is thoughtfully designed and potentially impactful. Most of my comments are clarification and presentation tweaks that, if addressed, would improve transparency and reader confidence without requiring heavy re-analysis. I particularly appreciate the effort to bring single-cell data and external evaluations into the narrative. Below are suggestions to strengthen the manuscript: 1. Clarify dataset flow and harmonization: add a one-page flow diagram and briefly describe batch correction or use of study covariates. A simple schematic that lists platform, tissue, n, discovery vs validation, and QC would help a lot. 2. Standardize or justify DEG thresholds: align to a common |logFC| (for example, ≥0.5) or add a short rationale plus a quick sensitivity check to show stability of key results. 3. Specify and lock the validation pipeline: say where feature selection sits relative to cross-validation, how hyperparameters were tuned, and confirm that external sets were untouched until final testing. Add PR-AUC and a simple calibration metric (Brier) in the supplement. A brief leave-one-study-out check would be a nice bonus. 4. Validate the lipid gene universe: repeat enrichment and selection with curated Reactome or GO or KEGG lipid sets and report whether top pathways and hubs remain consistent. A short methods note plus a small supplemental table is enough. 5. Detail immune deconvolution and scRNA-seq QC: name the signature or tool, note how multiple testing across cell types was handled, and list basic scRNA thresholds (UMIs or genes, mitochondrial percent, doublet handling). One concise paragraph in Methods will do. 6. Reframe drug-enrichment as exploratory: present DSigDB or Enrichr hits as hypotheses and, if possible, cross-check with an orthogonal resource such as L1000 or CMap. Avoid therapeutic language. 7. Qualify performance claims: keep the strong AUCs but add a brief caveat about cohort size and platform or tissue heterogeneity. Include study-wise curves in the supplement so readers can see consistency. 8. Share reproducible materials: deposit analysis code, processed matrices, and per-figure numeric data in a public repository (GitHub). This will satisfy transparency expectations and help others reuse the work. The manuscript is well conceived and largely sound. My suggestions are to clarify the dataset flow, lightly harmonize thresholds, document the ML validation steps, and moderate the interpretation. These can be handled with concise text edits and small supplemental additions, not major new analyses. With these clarifications, the work should meet PLOS ONE’s standards. Thank you for the opportunity to review this manuscript. Reviewer #2: The study presents a well-structured and methodologically sound investigation into lipid metabolism abnormalities in sepsis and atrial fibrillation (AF). The integration of multiple GEO datasets and the use of machine learning models (LASSO, Random Forest, SVM-RFE) are appropriate and executed with rigor. The identification of CD81, CKAP4, and DPEP2 as shared biomarkers is supported by robust statistical validation. Suggestions: • Clarify the independence of training and validation datasets to address potential overfitting, especially given the perfect AUC (1.000) reported for AF. • Consider including experimental validation (e.g., qPCR or immunohistochemistry) to strengthen biological relevance. 2. Methodological Rigor The manuscript demonstrates strong computational methodology. Differential expression analysis, WGCNA, and enrichment analyses are well-documented. Immune infiltration and single-cell transcriptomic analyses add depth to the findings. Suggestions: • Provide more detail on batch effect correction and normalization steps for reproducibility. • Include rationale for selecting top 4,000 lipid metabolism genes from GeneCards—this cutoff appears arbitrary without justification. ********** what does this mean? ). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: No Reviewer #2: Yes: Maha Ahmed ********** [NOTE: If reviewer comments were submitted as an attachment file, they will be attached to this email and accessible via the submission site. Please log into your account, locate the manuscript record, and check for the action link "View Attachments". If this link does not appear, there are no attachment files.] While revising your submission, please upload your figure files to the Preflight Analysis and Conversion Engine (PACE) digital diagnostic tool, https://pacev2.apexcovantage.com/ . PACE helps ensure that figures meet PLOS requirements. To use PACE, you must first register as a user. Registration is free. Then, login and navigate to the UPLOAD tab, where you will find detailed instructions on how to use the tool. If you encounter any issues or have any questions when using PACE, please email PLOS at figures@plos.org |
| Revision 1 |
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<p>Molecular Mechanisms of Lipid Metabolism Abnormalities Driving Sepsis and Atrial Fibrillation: A Systematic Study Based on Bioinformatics and Machine Learning PONE-D-25-28089R1 Dear Dr. Long, We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements. Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication. An invoice will be generated when your article is formally accepted. Please note, if your institution has a publishing partnership with PLOS and your article meets the relevant criteria, all or part of your publication costs will be covered. Please make sure your user information is up-to-date by logging into Editorial Manager at Editorial Manager® and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact billing support . If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. Kind regards, Wenxing Li Academic Editor PLOS ONE Additional Editor Comments (optional): Reviewers' comments: Reviewer's Responses to Questions Comments to the Author Reviewer #1: All comments have been addressed Reviewer #3: All comments have been addressed ********** 2. Is the manuscript technically sound, and do the data support the conclusions??> Reviewer #1: Yes Reviewer #3: Yes ********** 3. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #3: Yes ********** 4. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #3: Yes ********** 5. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #3: Yes ********** Reviewer #1: All comments addressed. Novel findings. Technically sound. Questionable importance, will keep to the readers. Recommend acceptance. Reviewer #3: Public Code Availability (Recommendation for Reproducibility): Given the detailed and complex bioinformatics pipeline utilized, we strongly recommend politely asking the authors to publicly upload the detailed R scripts and analytical codes to an accessible online repository (such as GitHub or Zenodo) to maximize the reproducibility and long-term utility of this work. While the authors confirmed the code is available upon reasonable request , public sharing is the gold standard for bioinformatics research and is essential to ensure the full transparency of the complex machine learning pipeline described in this revised manuscript. 1. Enhanced Data Processing and Reproducibility: Batch Correction and Normalization: The methodology was clarified to confirm that batch effects in the Atrial Fibrillation (AF) datasets were eliminated using the removeBatchEffect function from the R package limma, specifying that "dataset origin + detection platform" were used as covariates. Normalization involved Z-score scaling (mean of 0, standard deviation of 1) during Principal Component Analysis (PCA). Workflow Transparency: A supplementary flow chart was added to visually track the entire analytical workflow, from data acquisition and quality control (QC) through to validation. Specific QC thresholds were also added for the single-cell RNA sequencing (scRNA-seq) data, including thresholds for gene features (nFeature_RNA > 300) and mitochondrial gene proportion (< 20%). 2. Justification of Statistical Thresholds: The use of disease-specific thresholds for identifying differentially expressed genes (DEGs) was explicitly justified: a stringent threshold of ∣logFC∣>1 was used for Sepsis (reflecting acute, high-magnitude inflammatory changes), while a lower threshold of ∣logFC∣>0 was retained for AF (to capture the subtle expression changes typical of chronic electrophysiological remodeling). 3. Machine Learning Validation Integrity: Preventing Overfitting: The authors confirmed that feature selection (using LASSO and Support Vector Machine-Recursive Feature Elimination, or SVM-RFE) was performed within a rigorous nested 10-fold cross-validation framework to prevent data leakage. External Validation Isolation: The external validation cohorts (GSE65682 for Sepsis and GSE41177 for AF) were kept completely isolated from the training, feature selection, and parameter optimization stages, only being used for the final diagnostic performance evaluation (ROC curve analysis). The exceptionally high Area Under the Curve (AUC) of 1.000 for the AF validation set was attributed to the high biological specificity of the tissue used (left atrial appendage). 4. Revision of Scope and Acknowledged Limitations: Exploratory Framing: The "Potential Drug Prediction" section was appropriately revised to "Exploratory Compound Enrichment Analysis" to emphasize that the findings are strictly hypothesis-generating and avoid premature therapeutic claims. Future Directions: The study explicitly acknowledged its primary limitation is the current lack of wet-lab validation (e.g., qPCR) of the core feature genes (CD81, CKAP4, DPEP2) and committed to pursuing this in future work to strengthen the biological relevance. They also noted the need to expand the sample size of certain cohorts, particularly the AF validation set. Well done! ********** what does this mean? ). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: Yes: Laith Alomari, MD Reviewer #3: Yes: Ali Afkhaminia ********** |
| Formally Accepted |
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PONE-D-25-28089R1 PLOS ONE Dear Dr. Long, I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now being handed over to our production team. At this stage, our production department will prepare your paper for publication. This includes ensuring the following: * All references, tables, and figures are properly cited * All relevant supporting information is included in the manuscript submission, * There are no issues that prevent the paper from being properly typeset You will receive further instructions from the production team, including instructions on how to review your proof when it is ready. Please keep in mind that we are working through a large volume of accepted articles, so please give us a few days to review your paper and let you know the next and final steps. Lastly, if your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. You will receive an invoice from PLOS for your publication fee after your manuscript has reached the completed accept phase. If you receive an email requesting payment before acceptance or for any other service, this may be a phishing scheme. Learn how to identify phishing emails and protect your accounts at https://explore.plos.org/phishing. If we can help with anything else, please email us at customercare@plos.org. Thank you for submitting your work to PLOS ONE and supporting open access. Kind regards, PLOS ONE Editorial Office Staff on behalf of Dr. Wenxing Li Academic Editor PLOS ONE |
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