Peer Review History
| Original SubmissionJune 25, 2025 |
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Dear Dr. Wu, Please submit your revised manuscript by Oct 30 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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Please include captions for your Supporting Information files at the end of your manuscript, and update any in-text citations to match accordingly. Please see our Supporting Information guidelines for more information: http://journals.plos.org/plosone/s/supporting-information . 8. 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: Partly Reviewer #2: Yes ********** 2. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: Yes ********** 3. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: No 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: The authors investigated the mechanism of limonin anticancer effect through the induction of ferroptosis. The authors claimed that it is through the activation of sEH expression. The data only partly support this conclusion. While there are some correlation between presence of limonin and sEH protein levels, the authors did not show a direct causality between limonin, ferroptosis and sEH. Also, the authors have tendency to overstate the meaning of their results. Thus, at minimal this paper should be deeply revised with additional experiments to support their conclusions. 1. Overall, the English is OK, but it will benefit greatly to be corrected by an English speaker, as they are many little errors and many usage of confusing terms. 2. Introduction. Line 91 to 112 are basically an abstract of the paper. the paper has already an abstract and a conclusion; this part should summarize the approaches taken to test the hypothesis 3. The authors tried to hard to link limonin to sEH, especially that the links they found in their in silico approach (figure 1) are pretty weak. the analysis of the gene expression does not reveal sEH as significantly changed in the disease group. The cross between Limonin and the gene expression data is very weak. The docking simulation are worthless without showing that binding generate some changes in the enzyme activities of the sEH. Without wet-lab data supporting it, this kind of docking is worthless. 4.line 450: EPHX2 has been associated with mitochondrial damages and apoptosis before. How association with ferroptosis is different? 5. Line 457. If you are overexpressing ephx2, it is normal to observe higher levels of ephx2. 6. in the whole paragraph about the relation between ephx2 and ferroptosis, the authors only looks at gene/protein expression, which in my view does not confirm causality between ephx2 and ferroptosis. The authors should test if expression levels of sEH influence the cells response to induced ferroptosis (inhibition of GPX4). 7. ephx2 derived protein (sEH) has 2 enzymatic activities (epoxide hydrolase and phosphatase), which one is important for induction of ferroptosis? 8. paragraph 3.4. it is interesting that limonin apparently increased the ephx2 expression levels. However there is some unanswered key questions: is this by directly activating ephx2 promoter region or indirectly? This could answer the causality between limonin and ephx2. Does changing ephx2 expression level change the cells sensitivity to limonin? If there is no ephx2, will the cells be insensitive to limonin? 9. lines 540-550. The IC50 obtained here cannot be directly compared to IC50s found in other studies as the experimental conditions were certainly different. Thus, the authors cannot say that limonin is better than other natural compounds simply of that results. 10. conclusion. sEH inhibition is pushed to treat various diseases. Based on the observation that higher sEH levels leads to faster carcinoma cell death, should sEH inhibition have negative effect on some carcinoma treatment? 11. In general, all the figures have too many panels on it, making it impossible to read any figure because they are too small. The authors should reduce significantly the number of panels on each figures in the main text, and send the supporting results in supplemental information. Reviewer #2: Advantages The manuscript showed strong evidence to support their proposed hypothesis thst limonin may bind to EPHX2, and the bound form of EPHX2 would induce a stronger ferroptotic response in cervical squamous cell carcinoma (CESC) cells. Their data also strongly support that limonin can reduce the viability of CESC cells by inducing ferroptosis through the EPHX2 protein. The researchers further strengthened their conclusion by using the cell line with the lowest EPHX2 activity for overexpression experiments and the one with the highest activity for knockout experiments, showing that ferroptosis in CESC cells could be enhanced by limonin in correlation with the presence of EPHX2. However, a few minor concerns exist. Concerns 1. In the methodology, the researchers used four different CESC cell lines (HeLa, SiHa, CaSki, and ME-180) to test for EPHX2 expression; however, only two cell lines (HeLa and SiHa) were selected for further experiments. The exclusion of the other two cell lines could have given important information with respect to overexpression or knockdown experiments. 2. In the results, the researchers state that certain genes are upregulated in the diseased group (ANO10, RBM20, CRISP2, etc.), while others are downregulated (HAUS5, APOC1, WDHD1). However, the corresponding figures (1C and 1D) appear to suggest the opposite pattern. Section 3.1 dentification of EPHX2 as a Potential Drug Target of Limonin among Differentially Expressed Genes in Cervical Cancer; line 364~368: “The results of the volcano plot of differentially expressed genes (Figure 1C) and the cluster heatmap (Figure 1D) indicated that ANO10, RBM20, CRISP3, etc. were significantly up-regulated in the“Disease”group, while HAUS5, APOC1, WDHD1 were significantly down-regulated in the“Disease”group.” 3. In result section, the researcher compared the cancer cell avialability percentage and EDU+ ratio for 3 groups and all three groups were shown under the bar-graph titled “HeLa”. However, the EPHX2 knockout group “siEPHX2-1” was not made from HeLa cells but SiHa cells, but was compared with two reusults based on HeLa cells. Such comparisons rases concern as the fundamental cell lines has changed but not indicated or properly discussed in the literature or figure legends. Section 3.4 Limonin Can Target and Activate EPHX2 to Inhibit the Proliferation of HeLa Cells; line 485~488: “Further research revealed that Limonin could inhibit the proliferative capacity of HeLa cells. However, knockdown of EPHX2 could counteract the inhibitory effect of Limonin on the proliferative capacity of HeLa cells (Figure 4D).” Section 2.6 Cell Transfection and Cell Grouping; line 213~219:“Cell Grouping for Verifying the Effect of EPHX2 Expression on Cervical Squamous Cell Carcinoma Progression In HeLa cells, they were divided into two groups: the over-expression control group (oeNC) and the EPHX2 over-expression group (oeEPHX2). In SiHa cells, they were divided into three groups: the knockdown control group (siNC), the EPHX2 knockdown group 1 (siEPHX2-1), and the EPHX2 knockdown group 2 (siEPHX2-2).” Minor concerns 1. Abbreviation “PNI” are not explained Section 1 Introduction; line 60: “Existing treatment regimens have limited effectiveness for59 high-risk patients with para - aortic lymph node metastasis or low PNI,60 and there is a lack of precise biomarkers for guidance.” 2. Some sentences need minor corrections. For example, space before and after “Limonin” and “VennDiagram” is needed. Section 2.4 Subsequent Gene Screening; line 158~162: “In the CTD database (https://ctdbase.org/),“Limonin” was used as a158 keyword to search for the targets of limonin. The R159 package“VennDiagram”was employed to find the intersection between160 the limonin targets and the differentially expressed genes obtained161 above[17].” ********** 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: Yue Yu ********** [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 . Please note that Supporting Information files do not need this step. |
| Revision 1 |
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Limonin induces ferroptosis in cervical squamous cell carcinoma by activating the expression of soluble epoxide hydrolase 2 protein PONE-D-25-32196R1 Dear Dr. Wu, 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, Aldrin V. Gomes, Ph.D. 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 #2: All comments have been addressed ********** 2. Is the manuscript technically sound, and do the data support the conclusions??> Reviewer #1: Yes Reviewer #2: Yes ********** 3. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: Yes ********** 4. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #2: Yes ********** 5. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes ********** Reviewer #1: the authors answered the reviewer requests in a satisfactory manner; they added additional results supporting their work. Reviewer #2: The authors removed the naming abbreviations for the cell lines. Though in a way elucidated the situation, it could be somewhat confusing for the readers as the abbrevations were later mentioned in the result section. ********** 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 ********** |
| Formally Accepted |
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PONE-D-25-32196R1 PLOS One Dear Dr. Wu, 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. Aldrin V. Gomes Academic Editor PLOS One |
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