Evidence map›Paper›PMID 19421411›Full record

ArticleMolecular vision2009

Apolipoprotein E polymorphisms and primary glaucoma in Saudis.

Najwa Mohammed Al-Dabbagh, Nourah Al-Dohayan, Misbahul Arfin, Mohammad Tariq

Abstract read
In one paragraph

Article in Molecular vision, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

36 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. International journal of molecular sciences · 2024
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  11. TheOphthalmology science · 2022
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  17. Association of APOE Gene Polymorphisms with Cerebral Infarction in the Chinese Population.Medical science monitor : international medical journal of experimental and clinical research · 2018
    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

4 authors.

Najwa Mohammed Al-DabbaghDepartment of Ophthalmology, Armed Forces Hospital, Riyadh, Saudi Arabia.
Nourah Al-Dohayan
Misbahul Arfin
Mohammad Tariq

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe frequencies of apolipoprotein E (APOE) alleles and genotypes were examined in 230 Saudi subjects including primary open-angle glaucoma (POAG; n=60) and primary angle-closure glaucoma (PACG; n=40) patients as well as 130 control subjects.

methodsThe presence of glaucoma in patients was based on clinical examination and/or ophthalmic records. The APOE allele frequency (epsilon2, epsilon3, and epsilon4) was studied by polymerase chain reaction (PCR) followed by reverse-hybridization and restriction fragment length polymorphism techniques.

resultsAnalysis of data showed a complete absence of epsilon2 allele and a significantly lower frequency of the epsilon3 allele in primary glaucoma patients (90.5%) compared to the control subjects (95.7%, p=0.034, relative risk [RR]=0.473, protective fraction [PF]=0.318). The frequency of the epsilon4 allele was significantly higher in the glaucoma patients (9.5%) compared to the control subjects (4.2%, p=0.034, RR=2.169, etiological fraction [EF]=0.329). The epsilon3/epsilon3 genotype was more common in controls than patients (p=0.060, RR=0.465, PF=0.322). The difference in genotype (epsilon3/epsilon4) was not statistically significant between the two groups (p=0.283). Genotype epsilon4/epsilon4 was found only in 3% of patients while being completely absent in the controls (p=0.080). The genotypes, epsilon2/epsilon2, epsilon2/epsilon3, and epsilon2/epsilon4, were absent in both the test and control groups. When patients were divided on the basis of types of glaucoma, POAG patients had a significantly higher frequency of epsilon4 allele and epsilon4/epsilon4 genotype than controls whereas there was no significant difference between PACG patient and control groups in frequencies of APOE alleles and genotypes.

conclusionsThis study indicates that the epsilon4 allele may be associated with POAG and could be a risk factor while epsilon3 may be protective for POAG, and APOE polymorphisms may not be associated at all with PACG in Saudis.

Indexed as

Polymorphism, GeneticAdultAgedApolipoproteins EData Interpretation, StatisticalFemaleGene FrequencyGlaucoma, Angle-ClosureGlaucoma, Open-AngleHumansMaleMiddle AgedPolymerase Chain ReactionPolymorphism, Restriction Fragment LengthProtein IsoformsSaudi ArabiaApolipoproteins EProtein Isoforms

Identifiers

PMID19421411
PMCPMC2676199

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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.