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Investigation of albinism genes in congenital esotropia

journal contribution
posted on 2023-05-16, 14:41 authored by Kathryn BurdonKathryn Burdon, Wilkinson, RM, Barbour, JM, Joanne DickinsonJoanne Dickinson, Jim Stankovich, David MackeyDavid Mackey, Sale, MM
Purpose: Esotropia is a feature of albinism. Amongst esotropic patients there may be mild unrecognised albinos. Oculocutaneous albinism shares several clinical features with congenital esotropia. It is well known that mammals with oculocutaneous albinism have misrouted retinal ganglion cell axons, most likely caused by the absence of melanin or DOPA during development. We investigated the hypothesis that mutations in the albinism genes Tyrosinase, the P Gene, and TYRP1 may also be responsible for congenital esotropia via a similar mechanism. Methods: We screened these three genes in 21 families with congenital esotropia using single stranded conformational polymorphism analysis. Results: No rare sequence variants segregating with esoptopia were detected. A novel silent mutation of the TYRP1 gene was identified in one pedigree but is not likely to be causative. Several previously reported common polymorphisms were detected but do not segregate with disease in this population. Conclusions: Rare mutations of these genes do not appear to be responsible for congenital esotropia. Although we found no evidence for segregation of common variants with disease, these require further investigation for a possible contribution to a complex threshold model. Several lines of evidence indicate a genetic componenet of congenital esotropia, however, this is the first investigation of candidate genes for this disorder.

History

Publication title

Molecular Vision

Volume

9

Issue

83-85

Pagination

710-714

ISSN

1090-0535

Department/School

Menzies Institute for Medical Research

Publisher

Molecular Vision

Place of publication

Atlanta, USA

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified

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