Evidence map›Paper›PMID 23322568›Full record

ArticleInvestigative ophthalmology & visual science2013

Variations in opsin coding sequences cause x-linked cone dysfunction syndrome with myopia and dichromacy.

Michelle McClements, Wayne I L Davies, Michel Michaelides, Terri Young, Maureen Neitz, Robert E MacLaren, Anthony T Moore, David M Hunt

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Investigative ophthalmology & visual science, 2013. 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
2.5field-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

37 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
  5. Zoological research · 2026
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  7. Article
  8. Article
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  11. Article
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  13. Review
  14. Article
  15. NovelInternational journal of molecular sciences · 2022
    Article
  16. Insight fromGenes · 2022
    Article
  17. Article
  18. Intermixing theGenes · 2021
    Review
  19. Chimeric human opsins as optogenetic light sensitisers.The Journal of experimental biology · 2021
    Article
  20. IMI Risk Factors for Myopia.Investigative ophthalmology & visual science · 2021
    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

8 authors at 7 institutions in 3 countries.

Michelle McClementsUniversity College London Institute of Ophthalmology, London, United Kingdom.
Wayne I L Davies
Michel Michaelides
Terri Young
Maureen Neitz
Robert E MacLaren
Anthony T Moore
David M Hunt
Duke Medical Center · USMoorfields Eye Hospital · GBMoorfields Eye Hospital NHS Foundation Trust · GBNational Institute for Health Research · GBUniversity College London · GBUniversity of Oxford · GBUniversity of Western Australia · AU

Funding

Vision Research CoreP30EY001730 · NEI · UNIVERSITY OF WASHINGTON · PI MAUREEN E NEITZ · 1985 to 2026
$23.5M
The Molecular Genetics of High MyopiaR01EY014685 · NEI · UNIVERSITY OF WISCONSIN-MADISON · PI YOUNG, TERRI LOIS · 2003 to 2017
$8.1M
EXPRESSION AND FUNCTION OF CONE PIGMENT GENESR01EY009620 · NEI · UNIVERSITY OF WASHINGTON · PI NEITZ, JAY · 1992 to 2011
$5.5M
NEI NIH HHS P30 EY001730NEI NIH HHS P30EY01730NEI NIH HHS R01 EY009620NEI NIH HHS R01 EY014685NEI NIH HHS R01EY014685-07A2NEI NIH HHS R01EY09620
6 · The paper itself

Abstract

purposeTo determine the role of variant L opsin haplotypes in seven families with Bornholm Eye Disease (BED), a cone dysfunction syndrome with dichromacy and myopia.

methodsAnalysis of the opsin genes within the L/M opsin array at Xq28 included cloning and sequencing of an exon 3-5 gene fragment, long range PCR to establish gene order, and quantitative PCR to establish gene copy number. In vitro expression of normal and variant opsins was performed to examine cellular trafficking and spectral sensitivity of pigments.

resultsAll except one of the BED families possessed L opsin genes that contained a rare exon 3 haplotype. The exception was a family with the deleterious Cys203Arg substitution. Two rare exon 3 haplotypes were found and, where determined, these variant opsin genes were in the first position in the array. In vitro expression in transfected cultured neuronal cells showed that the variant opsins formed functional pigments, which trafficked to the cell membranes. The variant opsins were, however, less stable than wild type.

conclusionsIt is concluded that the variant L opsin haplotypes underlie BED. The reduction in the amount of variant opsin produced in vitro compared with wild type indicates a possible disease mechanism. Alternatively, the recently identified defective splicing of exon 3 of the variant opsin transcript may be involved. Both mechanisms explain the presence of dichromacy and cone dystrophy. Abnormal pigment may also underlie the myopia that is invariably present in BED subjects.

Indexed as

Gene Expression RegulationAdolescentAdultColor Vision DefectsDNAElectroretinographyExonsFemaleGenetic Diseases, X-LinkedGenotypeHumansImmunohistochemistryMaleMyopiaPedigreePolymerase Chain ReactionDNARod Opsins

Identifiers

PMID23322568
PMCPMC3597186
OpenAlexW1992437832

What OpenQuestion holds

Textmetadata
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.