Peer Review History
| Original SubmissionMay 19, 2025 |
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Dear Dr. Zhou, 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 Sep 26 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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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. [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: Partly Reviewer #3: Yes ********** 2. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: I Don't Know Reviewer #3: 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 Reviewer #3: Yes ********** 4. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes ********** Reviewer #1: To author This study employs single-cell RNA sequencing (scRNA-seq) to investigate glucocorticoid (GC) response mechanisms in vascular endothelial cells (VECs) during diabetic retinopathy (DR). The work addresses a clinically relevant issue—suboptimal efficacy of GC therapy in DR—and identifies novel transcriptional regulators, signaling pathways, and therapeutic candidates. While the study is conceptually innovative and some questions still need to be answered: 1. There is only one DR and one control sample were analyzed. Justify this minimal sample size statistically and address potential batch effects. 2. The AUC threshold of 0.13 for GC-active cells lacks biological validation (Fig. 3A) 3. Key findings (e.g., KLF4-hydroxyurea interaction, PTN/ANGPTL pathways) and Functional roles of novel hub genes (DUSP6, AP1S2, PTPRB) rely solely on bioinformatics, still need to be tested in vitro and in vivo experiments (e.g., qPCR/WB of KLF4 in glucose-stressed VECs ± hydroxyurea) or cite existing experimental support. 4. Fig. 4F heatmap labels are illegible; Fig. 6E ligand-receptor pairs are unclear. 6. ApoE’s contradictory roles in DR (p. 22) need nuanced discussion. Reviewer #2: This manuscript presents an extensive single-cell transcriptomic analysis of diabetic retinopathy (DR) using the publicly available mouse dataset GSE178121. The study is ambitious, methodologically sophisticated, and touches on multiple biological levels, from single-cell gene expression to signaling pathways and therapeutic prediction. However, several major limitations (particularly the minimal number of biological samples) raise concerns about the robustness and generalizability of the findings. Major Concerns: 1. Extremely limited sample size (n = 1 DR and 1 Control): The entire analysis is based on a single biological replicate per condition. This severely limits the statistical power, increases the risk of technical or individual variation bias, and raises doubts about the generalizability of the findings. This limitation should be clearly stated in the discussion as well as an explanation of why such a small sample was used. 2. The authors propose specific genes (e.g., Klf4, DUSP6, PTPRB) and drugs (e.g., hydroxyurea) as potentially relevant for DR, but no validation using independent datasets, wet-lab experiments, or literature-based confirmation is provided. This makes the therapeutic implications speculative. This should be clearly stated in the text. 3. The authors use CellChatDB.human for mouse scRNA-seq data without justification. Why was this decision made? Given known species-specific differences in ligand-receptor interactions, this may introduce artefacts into the intercellular communication analysis. 4. Some functional conclusion, for example, about VECs' involvement in visual perception-related pathways are speculative. While the authors provide literature explanations, these interpretations stretch beyond what can be reliably inferred from the data. Minor Concerns and Suggestions: 5. It is unclear whether FDR correction or multiple testing adjustments were consistently applied across DEG and enrichment analyses (e.g., limma, AUCell, Monocle 2). Clarification is needed. 6. The threshold for defining “glucocorticoid-active” cells (AUC > 0.13) is described as "ideal" but not justified. Please explain how this value was determined. 7. Clustering was performed with resolution = 0.5, but there is no mention of sensitivity testing or comparison to other resolutions. 8. All gene names across the manuscript should be indicated in italics. Consider consulting a professional editor to ensure clarity and precision of the manuscript. Language: while generally readable, the manuscript would benefit from careful proofreading to eliminate long and occasionally convoluted sentences, particularly in the Discussion section. Overall recommendation: While this manuscript presents a well-constructed computational pipeline and addresses a biologically and clinically relevant topic, the lack of biological replication is a critical limitation. The findings should be interpreted as exploratory and hypothesis-generating, rather than definitive. If the authors clearly acknowledge the limitations of their dataset, temper their conclusions accordingly, and improve clarity in methodology and justification of parameters, this manuscript could provide a valuable resource for generating hypotheses for future experimental work. Reviewer #3: Glucocorticoid signaling has been shown to play an active role in the progression of diabetic retinopathy (DR), yet the underlying cellular origins of this activity remain poorly characterized. In this manuscript, Wang et al. performed a systematic analysis of a publicly available single-cell RNA-seq dataset from healthy and streptozotocin-induced diabetic mouse retinas. They identified a prominent role for vascular endothelial cells (VECs) in regulating glucocorticoid signaling during DR progression. The study focused on glucocorticoid-related genes and their regulatory networks, including transcription factors, non-coding RNAs, and protein–protein interactions. While the authors present several informative findings from comparisons between control and DR VECs, a number of data interpretations require greater accuracy and specificity to meet publication standards. Detailed comments are provided below. 1. Sample size. Please clarify the sample size discrepancy between this manuscript and the original dataset (GSE178121). The original study (Sun et al., 2021) reported pooling cell suspensions from three healthy and three diabetic retinas, yielding >14,000 single cells per group. In contrast, the present manuscript states that only one DR and one control sample were analyzed, yielding 5,818 single cells. If n = 1 per group was indeed used, please explain how statistical significance was determined for differentially expressed genes (e.g., Figure 3B). 2. Figure 2D. The statement that “the majority of cells exhibited minimal changes before and after the onset of DR” is inaccurate, as several cell types (e.g., bipolar cells, cones, amacrine cells) display notable percentage changes. 3. Figure 3A. Please clarify: Were only DR group cells used for the AUCell analysis? How were input genes ranked for the AUCell gene set enrichment analysis—by raw expression levels in each DR cell? What is the rationale for selecting AUC ≥ 0.13 as the cutoff value? What does each dashed line represent? These details should be included in the Methods or Results section. 4. Table S3. Of the 199 DEGs, how many are glucocorticoid-related genes? 5. Figure 5A and 5B. What is the difference in the “Average Expression” values between these two figures? 6. Figure 5C. Does this distribution represent DR VECs only? Please specify. Several transcription factors (TFs) display inconsistent expression patterns between Figures 5A and 5C (e.g., Klf4 is low in DR in Figure 5A but high in Figure 5C). Please explain the normalization method used for each figure. Why were significantly changed TFs chosen based only on Figures 5B/C, when only 6 out of 11 TFs showed higher expression in DR than in control in Figure 5A? What is the expression of these TFs across all retinal cell types—do VECs show enrichment? 7. Figure 6B and 6C. The increased communication between VECs and amacrine cells in DR is intriguing. While briefly mentioned in the Results, a more detailed discussion is expected on specific ligand–receptor pairs driving this change (e.g., CX3C and FGF signals in Figure 6D; Sema3a and Ptn in Figure 6E). For example, why is the Ptn–Ncl signal increased between VECs and amacrine cells but decreased between VECs and many other cell types in DR? 8. Figure 6E. Most VEC-initiated signaling appears decreased in DR progression. Was this expected? Please elaborate. 9. Figure 7E. What cell population was analyzed in this correlation analysis? 10. Discussion – state-specific genes. For State 2, which specific metabolic genes were identified, and is there literature linking them to DR progression? For State 3, which specific genes are associated with visual perception and light stimulus responses? A deeper discussion of these findings would provide stronger insight to the field. 11. Of the 11 significantly changed TFs, do any directly bind to the 25 hub genes? References: Licheng Sun, Ruonan Wang, Guangyi Hu, Huazhen Liu, Kangjia Lv, Yi Duan, Ning Shen, Jiali Wu, Jing Hu, Yujuan Liu, Qihuang Jin, Fang Zhang, Xun Xu. Single cell RNA sequencing (scRNA-Seq) deciphering pathological alterations in streptozotocin-induced diabetic retinas. Experimental Eye Research. Volume 210, 2021. https://doi.org/10.1016/j.exer.2021.108718. ********** 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: No Reviewer #3: No ********** [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 . 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| Revision 1 |
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Single-Cell Sequencing Reveals the Response Mechanisms of Vascular Endothelial Cells to Glucocorticoids in Diabetic Retinopathy PONE-D-25-26641R1 Dear Dr. Zhou, 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, Chengming Fan, MD, PhD Academic Editor PLOS ONE Additional Editor Comments (optional): Reviewer #1: Reviewer #2: Reviewer #3: Reviewers' comments: Reviewer's Responses to Questions Comments to the Author Reviewer #1: (No Response) Reviewer #2: 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: (No Response) Reviewer #2: Yes Reviewer #3: Yes ********** 3. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: (No Response) Reviewer #2: I Don't Know Reviewer #3: Yes ********** 4. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: (No Response) Reviewer #2: Yes Reviewer #3: Yes ********** 5. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes ********** Reviewer #1: The manuscript now presents a coherent and convincing story. It leverages state-of-the-art single-cell sequencing technology to elucidate a pathophysiologically relevant question with potential clinical ramifications. The data is robust, the analysis is sound, and the conclusions are well-supported.I recommend that this manuscript be accepted for publication. Reviewer #2: Thank you for addressing my comments and for the revisions made to the manuscript. I am satisfied with the responses and the changes implemented, and I consider the manuscript suitable for publication in its current form. Reviewer #3: (No Response) ********** 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: saijun zhou Reviewer #2: No Reviewer #3: No ********** |
| Formally Accepted |
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PONE-D-25-26641R1 PLOS ONE Dear Dr. Zhou, 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. Chengming Fan Academic Editor PLOS ONE |
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