Peer Review History

Original SubmissionJanuary 19, 2023
Decision Letter - Sivaraj Mohana Sundaram, Editor

PONE-D-23-01721Expression of genes with biomarker potential identified in skin from DSLD-affected horses increases with agePLOS ONE

Dear Dr. Halper,

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Kind regards,

Sivaraj Mohana Sundaram

Academic Editor

PLOS ONE

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3. We noted in your submission details that a portion of your manuscript may have been presented or published elsewhere. [Data identifying several overexpressed genes was used for development. The data was taken from our previous publication: Haythorn, A., et al., Differential gene expression in skin RNA of horses affected with degenerative suspensory ligament desmitis. Journal of Orthopaedic Surgery and Research, 2020. 15(1): p. 460.] Please clarify whether this publication was peer-reviewed and formally published. If this work was previously peer-reviewed and published, in the cover letter please provide the reason that this work does not constitute dual publication and should be included in the current manuscript.

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Additional Editor Comments:

The presentation of the results needs to be improved. Please include all statistical significance test methods, dF, and exact p-values in the results section.

Bar graphs require individual data points, standard deviations, and graph color codes that should be defined within each figure.

The quality of scale bars on immunostaining pictures should be improved with a readable text size.

The findings and outlook could be summarized in an abstract figure.   

[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?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Abstract: well written, no comments.

Introduction: This work is based on the results from the authors previous work. They explain their previous work but I feel, they need to mention their horse breeds used in that study in introduction. Is there any other NGS study performed? Other than this group? This was not mentioned. Also their previous study was a transcriptomics study. NGS is a borad term to use.

Material and methods: In line 142, RT-PCR, please add reference for 2-ΔΔCt method. In line 160, Table 3, is GAPDH is only reference gene? This work depends highly on RT-PCR, so adding one more reference gene or area will be better.

Results: They are bit too elaboarted but understandable. Figures are without standard deviation/ standrad error bars. They need to be inserted.

Discussion: In line 351, Was NGS study performed on RNA isolated from skin tissues of affected DSLD horses?

Finally, I like the way authors recognises their drawbacks.

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Reviewer #1: No

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Revision 1

Concerning certain Journal requirements, we did provide information regarding animal treatment (in the Supporting Information section). The study was approved by institutional IACUC (line 108 in Material and Methods) Details about submission of supporting data from a previously done RNA-seq (Haythorn et al., 2020) can be found in an NIH repository at https://www.ncbi.nlm.nih.gov/Traces/study/?acc=PRJNA544650. Yes, the paper by Haythorn et al was published, see ref. number 3 in the manuscript. It is not a dual publication to this manuscript under review as it reports RNA -seq and identification of differentially expressed genes in RNA-seq. There was no attempt to establish any diagnostic criteria or assays using those data in the paper by Haythorn et al. The URL for the NCBI entry is now included in Data Availability section and in the manuscript itself (line 91).

The phrase “data not shown” was omitted. The reference list is complete and up to date.

Response to Editor comments: Statistical test methods and exact p-values are now included in the Result section and/or Figure legends where appropriate. Statistical evaluation was not done for results in Figure 3 because as we noted in the text the number of horses in each age group was limited (lines 365 and 366). We do not have scale bars on Fig. 5 (immunohistochemistry), but it is stated in the Figure legend that all photos are taken at 200x magnification. We did put together a Graphic abstract.

Response to Reviewer’s comments:

No. 3: https://www.ncbi.nlm.nih.gov/Traces/study/?acc=PRJNA544650 is included in the body of the paper in the Introduction (line 91), and in Data Availability at the end of the manuscript. : Statistical test methods and exact p-values are included in the Result section and/or Figure legends.

No. 5: NGS was changed to RNA-seq throughout the manuscript. Equine geneticists are more interested in SNP analysis where breeds do play a role. Because we do not know whether DSLD is actually a single entity, and because Peruvian Paso horses suffer from higher prevalence of DSLD we cannot exclude the possibility that breed plays a role. The breed importance is comparable to the role of ethnicity and race background in human disease.

Introduction: We did add that in addition to Peruvian Pasos we were able to obtain skin biopsies from several other breeds, e,g, Arabians, Warmbloods and Hanoverians (lines 70 and 71). As far as we know no other RNA-seq study has been done so far (line 87).

Material and methods: A reference for 2-∆∆Ct method using glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and actin beta (ACTB) was added (ref 6) as was one more reference gene (actin beta): line 146, Tables 3 and 4).

Results: standard deviations and statistical differences were marked in appropriate figures.

Discussion: yes, RNA-seq was performed on RNA isolated from skin samples from control and DSLD horses (lines 472 and 473), and also see in Introduction, lines 87 and 88.

Attachments
Attachment
Submitted filename: Response to Reviewers.docx
Decision Letter - Sivaraj Mohana Sundaram, Editor

Expression of genes with biomarker potential identified in skin from DSLD-affected horses increases with age

PONE-D-23-01721R1

Dear Dr. Halper,

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.

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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,

Sivaraj Mohana Sundaram

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

**********

3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

**********

4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

**********

5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: I have no comments this time. Authors answered comments and I accept the manuscript. Authors worked well on previous comments.

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7. PLOS authors have the option to publish the peer review history of their article (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

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Formally Accepted
Acceptance Letter - Sivaraj Mohana Sundaram, Editor

PONE-D-23-01721R1

Expression of genes with biomarker potential identified in skin from DSLD-affected horses increases with age

Dear Dr. Halper:

I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now with our production department.

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.

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Thank you for submitting your work to PLOS ONE and supporting open access.

Kind regards,

PLOS ONE Editorial Office Staff

on behalf of

Dr. Sivaraj Mohana Sundaram

Academic Editor

PLOS ONE

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