Evidence map›Paper›PMID 19753312›Full record

ArticleMolecular vision2009

Mutations that are a common cause of Leber congenital amaurosis in northern America are rare in southern India.

Periasamy Sundaresan, P Vijayalakshmi, Stewart Thompson, Audrey C Ko, John H Fingert, Edwin M Stone

Open access · greenAbstract 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 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 20% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Inherited retinal disorders: a genotype-phenotype correlation in an Indian cohort and the importance of genetic testing and genetic counselling.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2023
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  16. The Rpe65 rd12 allele exerts a semidominant negative effect on vision in mice.Investigative ophthalmology & visual science · 2014
    Article
  17. Complementation test of Rpe65 knockout and tvrm148.Investigative ophthalmology & visual science · 2013
    Article
  18. 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

6 authors at 1 institution in 1 country.

Periasamy SundaresanDepartment of Genetics, Dr. G. Venkataswamy Eye Research Institute, Aravind Medical Research Foundation, Madurai, Tamilnadu, India.
P Vijayalakshmi
Stewart Thompson
Audrey C Ko
John H Fingert
Edwin M Stone
Aravind Eye Hospital · IN

Funding

Howard Hughes Medical Institute
6 · The paper itself

Abstract

purposeTo test patients from southern India for the presence of mutations that most commonly cause Leber congenital amaurosis (LCA) in northern America.

methodsA review of the literature identified 177 unique LCA causing mutations in eight different genes: aryl hydrocarbon receptor interacting protein-like 1 (AIPL1), crumbs homolog 1 (CRB1), cone-rod homeobox (CRX), guanylate cyclase 2D (GUCY2D), nephronophthisis 6 (NPHP6), retinol dehydrogenase 12 (RDH12), retinal pigment epithelium-specific protein 65 kDa (RPE65), and retinitis pigmentosa GTPase regulator interacting protein 1 (RPGRIP1). Allele-specific ligation assay and bidirectional sequencing were used to test 38 unrelated LCA patients from southern India for 104 of these mutations, which contribute to more than 30% of the LCA cases in a northern American population.

resultsOnly one participant was found to harbor one of the 104 mutations in the allele-specific assay (homozygous RPE65 Tyr368His). A mutation that was not part of the assay (homozygous RPE65 Tyr143Asp) was incidentally detected in a second patient when an equivocal signal from one allele on the assay was followed up with automated DNA sequencing.

conclusionsMutations that contribute to 30% of the LCA cases in northern America were detected in only 2.6% of LCA cases in our cohort from southern India. There were no instances of IVS26 c.2991+1655 A>G in NPHP6, the most commonly detected mutation in LCA. These data suggest that LCA in India is caused primarily by a different set of mutations in the same genes associated with disease in northern America, or by mutations in other genes that have not yet been discovered. Therefore, mutation-specific assays developed for European and northern American cohorts may not be suited for testing LCA patients from India or other ethnically distinct populations.

Indexed as

AdolescentAdultAllelesBlindnessChildChild, PreschoolDNA Mutational AnalysisFamilyFemaleGenotypeHumansIndiaInfantMaleMutationNorth America

Identifiers

PMID19753312
PMCPMC2742639
OpenAlexW2102154680

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.