Evidence map›Paper›PMID 19339744›Full record

ArticleInvestigative ophthalmology & visual science2009

Genetic analysis of Indian families with autosomal recessive retinitis pigmentosa by homozygosity screening.

Hardeep Pal Singh, Subhadra Jalali, Raja Narayanan, Chitra Kannabiran

Abstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 21% 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

37 citing papers in PubMed, 1 synthesis or guideline pooled it, 61 citations in OpenAlex.

  1. Pooled it
  2. Genetics and phenotypes ofMolecular vision · 2025
    Article
  3. Outcomes of vitreoretinal surgery in eyes with retinitis pigmentosa without retinal detachment.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
    Article
  4. Article
  5. Article
  6. Article
  7. Observational
  8. Observational
  9. Review
  10. Genetic dissection of non-syndromic retinitis pigmentosa.Indian journal of ophthalmology · 2022
    Review
  11. Article
  12. Review
  13. Observational
  14. Genotype-Phenotype Correlations inJournal of clinical medicine · 2021
    Article
  15. Article
  16. Article
  17. 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 at 1 institution in 1 country.

Hardeep Pal SinghKallam Anji Reddy Molecular Genetics Laboratory, Champalimaud Translational Centre for Eye Research, Hyderabad Eye Research Foundation, Hyderabad, India.
Subhadra Jalali
Raja Narayanan
Chitra Kannabiran
L V Prasad Eye Institute · IN

Funding

RETINITIS PIGMENTOSA IN INDIA: MOLECULAR GENETIC STUDYR01TW006231 · FIC · HYDERABAD EYE RESEARCH FOUNDATION-L V PR · PI KANNABIRAN, CHITRA · 2002 to 2004
$162k
FIC NIH HHS R01 TW006231FIC NIH HHS R01 TW06231
6 · The paper itself

Abstract

purposeTo identify the disease-causing genes in families with autosomal recessive RP (ARRP).

methodsFamilies were screened for homozygosity at candidate gene loci followed by screening of the selected gene for pathogenic mutations if homozygosity was present at a given locus. A total of 34 families were included, of which 24 were consanguineous. Twenty-three genes were selected for screening. The presence of homozygosity was assessed by genotyping flanking microsatellite markers at each locus in affected individuals. Mutations were detected by sequencing of coding regions of genes. Sequence changes were tested for presence in 100 or more unrelated normal control subjects and for cosegregation in family members.

resultsHomozygosity was detected at one or more loci in affected individuals of 10 of 34 families. Homozygous disease cosegregating sequence changes (two frame-shift, two missense, and one nonsense; four novel) were found in the TULP1, RLBP1, ABCA4, RPE65, and RP1 genes in 5 of 10 families. These changes were absent in 100 normal control subjects. In addition, several polymorphisms and novel variants were found. All the putative pathogenic changes were associated with severe forms of RP with onset in childhood. Associated macular degeneration was found in three families with mutations in TULP1, ABCA4, and RP1 genes.

conclusionsNovel mutations were found in different ARRP genes. Mutations were detected in approximately 15% (5/34) of ARRP families tested, suggesting involvement of other genes in the remaining families.

Indexed as

HomozygoteMutationAdolescentAdultAmino Acid SequenceAsian PeopleChildChild, PreschoolConsanguinityEye ProteinsFemaleGenes, RecessiveGenetic TestingGenotypeHumansIndiaEye Proteins

Identifiers

PMID19339744
PMCPMC2777646
OpenAlexW2092033931

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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.