Evidence map›Paper›PMID 22412971›Full record

ArticlePloS one2012

EPHA2 polymorphisms and age-related cataract in India.

Periasamy Sundaresan, Ravilla D Ravindran, Praveen Vashist, Ashwini Shanker, Dorothea Nitsch, Badrinath Talwar, Giovanni Maraini, Monica Camparini, Bareng Aletta S Nonyane, Liam Smeeth and 3 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
2.4field-weighted citation impact, top 11% 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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it, 49 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review
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

13 authors at 7 institutions in 4 countries.

Periasamy SundaresanDepartment of Genetics, Dr. G. Venkataswamy Eye Research Institute, Aravind Medical Research Foundation, Aravind Eye Hospital, Madurai, Tamil Nadu, India.
Ravilla D Ravindran
Praveen Vashist
Ashwini Shanker
Dorothea Nitsch
Badrinath Talwar
Giovanni Maraini
Monica Camparini
Bareng Aletta S Nonyane
Liam Smeeth
Usha Chakravarthy
James F Hejtmancik
Astrid E Fletcher
Aravind Eye Hospital · INUniversity of London · GBUniversity of Parma · ITAll India Institute of Medical Sciences · INLondon School of Hygiene & Tropical Medicine · GBNational Eye Institute · USQueen's University Belfast · GB

Funding

Inherited Ocular DiseasesZIAEY000272 · NEI · NATIONAL EYE INSTITUTE · PI HEJTMANCIK, JAMES F. · 2009 to 2025
$27.0M
Clinical/molecular Studies In Families With Congenital Or Hereditary CataractsZIAEY000281 · NEI · NATIONAL EYE INSTITUTE · PI HEJTMANCIK, JAMES F. · 2009 to 2025
$18.1M
Wellcome Trust 073300Wellcome Trust 098504Wellcome Trust G082571
6 · The paper itself

Abstract

objectiveWe investigated whether previously reported single nucleotide polymorphisms (SNPs) of EPHA2 in European studies are associated with cataract in India.

methodsWe carried out a population-based genetic association study. We enumerated randomly sampled villages in two areas of north and south India to identify people aged 40 and over. Participants attended a clinical examination including lens photography and provided a blood sample for genotyping. Lens images were graded by the Lens Opacification Classification System (LOCS III). Cataract was defined as a LOCS III grade of nuclear ≥4, cortical ≥3, posterior sub-capsular (PSC) ≥2, or dense opacities or aphakia/pseudophakia in either eye. We genotyped SNPs rs3754334, rs7543472 and rs11260867 on genomic DNA extracted from peripheral blood leukocytes using TaqMan assays in an ABI 7900 real-time PCR. We used logistic regression with robust standard errors to examine the association between cataract and the EPHA2 SNPs, adjusting for age, sex and location.

results7418 participants had data on at least one of the SNPs investigated. Genotype frequencies of controls were in Hardy-Weinberg Equilibrium (p>0.05). There was no association of rs3754334 with cataract or type of cataract. Minor allele homozygous genotypes of rs7543472 and rs11260867 compared to the major homozygote genotype were associated with cortical cataract, Odds ratio (OR) = 1.8, 95% Confidence Interval (CI) (1.1, 3.1) p = 0.03 and 2.9 (1.2, 7.1) p = 0.01 respectively, and with PSC cataract, OR = 1.5 (1.1, 2.2) p = 0.02 and 1.8 (0.9, 3.6) p = 0.07 respectively. There was no consistent association of SNPs with nuclear cataract or a combined variable of any type of cataract including operated cataract.

conclusionsOur results in the Indian population agree with previous studies of the association of EPHA2 variants with cortical cataracts. We report new findings for the association with PSC which is particularly prevalent in Indians.

Indexed as

Polymorphism, Single NucleotideAdultAgedAge FactorsCataractFemaleGenetic Predisposition to DiseaseGenotypeHumansIndiaMaleMiddle AgedPhenotypePrevalenceReceptor, EphA2White PeopleReceptor, EphA2

Identifiers

PMID22412971
PMCPMC3297613
OpenAlexW1968972167

What OpenQuestion holds

Textmetadata
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.