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  4. Clinical and Genetic Findings of Autosomal Recessive Bestrophinopathy (ARB)
 
research article

Clinical and Genetic Findings of Autosomal Recessive Bestrophinopathy (ARB)

Habibi, Imen
•
Falfoul, Yosra
•
Todorova, Margarita G.
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December 1, 2019
Genes

Mutations in BEST1 cause several phenotypes including autosomal dominant (AD) Best vitelliform macular dystrophy type 2 (BVMD), AD vitreo-retino-choroidopathy (ADVIRC), and retinitis pigmentosa-50 (RP50). A rare subtype of Bestrophinopathy exists with biallelic mutations in BEST1. Its frequency is estimated to be 1/1,000,000 individuals. Here we report 6 families and searched for a genotype-phenotype correlation. All patients were referred due to reduced best-corrected visual acuity (BCVA), ranging from 0.1/10 to 3/10. They all showed vitelliform lesions located at the macula, sometimes extending into the midperiphery, along the vessels and the optic disc. Onset of the disease varied from the age of 3 to 25 years. Electrooculogram (EOG) revealed reduction in the EOG light rise in all patients. Molecular analysis revealed previously reported mutations p.(E35K);(E35K), p.(L31M);(L31M), p.(R141H);(A195V), p.(R202W);(R202W), and p.(Q220*);(Q220*) in five families. One family showed a novel mutation: p.(E167G);(E167G). All mutations were heterozygous in the parents. In one family, heterozygous children showed various reductions in the EOG light rise and autofluorescent deposits. Autosomal recessive Bestrophinopathy (ARB), although rare, can be recognized by its phenotype and should be validated by molecular analysis. Genotype-phenotype correlations are difficult to establish and will require the analysis of additional cases.

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Type
research article
DOI
10.3390/genes10120953
Web of Science ID

WOS:000507342400007

Author(s)
Habibi, Imen
Falfoul, Yosra
Todorova, Margarita G.
Wyrsch, Stefan
Vaclavik, Veronika
Helfenstein, Maria
Turki, Ahmed
El Matri, Khaled
El Matri, Leila
Schorderet, Daniel F.  
Date Issued

2019-12-01

Published in
Genes
Volume

10

Issue

12

Start page

953

Subjects

Genetics & Heredity

•

best1

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bestrophinopathy

•

arb

•

vitelliform macular dystrophy

•

best1 gene

•

mutations

•

phenotype

Note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.

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https://infoscience.epfl.ch/record/278605
Available on Infoscience
January 31, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/165048
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