Evidence map›Paper›PMID 32437405›Full record

ArticlePloS one2020

Altered mucins and aquaporins indicate dry eye outcome in patients undergoing Vitreo-retinal surgery.

Ramalingam Mani, P S Shobha, Saravanan Thilagavathi, Padmanabhan Prema, Natarajan Viswanathan, Ratra Vineet, Ratra Dhanashree, Narayanasamy Angayarkanni

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.9field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 28 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Post-vitrectomy dry eye: a prospective study of ocular surface changes and associated risk factors.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
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  13. Observational
  14. Ocular surface changes following vitreoretinal procedures.Indian journal of ophthalmology · 2023
    Review
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  16. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Ramalingam ManiRS Mehta Jain Department of Biochemistry and Cell Biology, Vision Research Foundation, SankaraNethralaya, Chennai, India.
P S ShobhaElite School of Optometry, Medical Research Foundation, SankaraNethralaya, Chennai, India.
Saravanan ThilagavathiElite School of Optometry, Medical Research Foundation, SankaraNethralaya, Chennai, India.
Padmanabhan PremaDepartment of Cornea and Refractive Surgery, Medical Research Foundation, SankaraNethralaya, Chennai, India.
Natarajan ViswanathanDepartment of Bio-Statistics, Vision Research Foundation, SankaraNethralaya, Chennai, India.
Ratra VineetDepartment of Comprehensive Ophthalmology, Medical Research Foundation, SankaraNethralaya, Chennai, India.
Ratra DhanashreeDepartment of Vitreo-retinal Diseases, Medical Research Foundation, SankaraNethralaya, Chennai, India.
Narayanasamy AngayarkanniRS Mehta Jain Department of Biochemistry and Cell Biology, Vision Research Foundation, SankaraNethralaya, Chennai, India.ORCID 0000-0002-8147-1589
Sankara Nethralaya · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vitreo-retinal (VR) surgeries induce conjunctival changes. However, there are no study reports regarding prevalence and severity of dry eye after these surgeries. This study evaluated dry eye outcome after VR surgery. Patients undergoing VR surgery classified as scleral buckle and microincision vitrectomy surgery (n = 44, mean age: 56.09±10.2 years) were recruited. Dry eye evaluation was done before and 8 weeks after surgery (2 weeks after omitting topical eye drops). Conjunctival imprint cytology for goblet cell count and tear Mucin 5AC (MUC5AC) protein estimation was done. Gene expressions of MUC5AC, MUC4, MUC16, Aquaporin 4 (AQP4) and AQP5 were analyzed in the conjunctival imprint cells by qPCR. None of the patients exhibited clinical signs of dry eye after VR surgery. But the conjunctival goblet cell density (GCD) was significantly lowered post-VR surgery (63% cases, **p = 0.012) with no alterations in the tear MUC5AC protein. Post-VR surgery, the conjunctival cell gene expression of MUC4, MUC16 and AQP4 were significantly increased (*p = 0.025, *p = 0.05 and *p = 0.02 respectively) and AQP5 was significantly lowered (*p = 0.037), with no change in MUC5AC expression. Tear cytokines were significantly increased post-VR surgery (anti-inflammatory: IL1RA, IL4, IL5, IL9, FGF; PDGFbb and pro-inflammatory: IL2, IL6, IL15, GMCSF and IFNg). Though clinical signs of dry eye were not observed after VR surgery, ocular surface changes in the form of reduced GCD, altered MUC5AC, MUC4, MUC16, AQP4, AQP5 and cytokines are suggestive of dry eye outcome at the molecular level especially inpatients aged above 51 years, especially female gender and those who are diabetic.

Indexed as

Aquaporin 4Aquaporin 5AquaporinsCA-125 AntigenConjunctivaDry Eye SyndromesFemaleGene ExpressionHumansMaleMembrane ProteinsMiddle AgedMucin-4Mucin 5ACMucinsTearsAQP4 protein, humanAquaporin 4Aquaporin 5AquaporinsCA-125 AntigenMembrane ProteinsMUC16 protein, humanMUC4 protein, humanMucin-4Mucin 5ACMucins

Identifiers

PMID32437405
PMCPMC7241722
OpenAlexW3028139034

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.