Association between missense mutations in the BBS2 gene and nonsyndromic retinitis pigmentosa.

Abstract:

IMPORTANCE:A large number of genes can cause inherited retinal degenerations when mutated. It is important to identify the cause of disease for a better disease prognosis and a possible gene-specific therapeutic intervention. OBJECTIVE:To identify the cause of disease in families with nonsyndromic retinitis pigmentosa. DESIGN, SETTING, AND PARTICIPANTS:Patients and family members were recruited for the study and underwent clinical evaluation and genetic analyses. MAIN OUTCOMES AND MEASURES:Identification of sequence variants in genes using next-generation sequencing. RESULTS:We performed exome sequencing for 4 families, which was followed by Sanger sequencing of the identified mutations in 120 ethnicity-matched patients. In total, we identified 4 BBS2 missense mutations that cause nonsyndromic retinitis pigmentosa. Three siblings of Moroccan Jewish ancestry were compound heterozygotes for p.A33D and p.P134R, and 6 patients belonging to 4 families of Ashkenazi Jewish ancestry were homozygous for either p.D104A or p.R632P, or compound heterozygous for these 2 mutations. The mutations cosegregated with retinitis pigmentosa in the studied families, and the affected amino acid residues are evolutionarily conserved. CONCLUSIONS AND RELEVANCE:Our study shows that BBS2 mutations can cause nonsyndromic retinitis pigmentosa and highlights yet another candidate for this genetically heterogeneous condition.

journal_name

JAMA Ophthalmol

journal_title

JAMA ophthalmology

authors

Shevach E,Ali M,Mizrahi-Meissonnier L,McKibbin M,El-Asrag M,Watson CM,Inglehearn CF,Ben-Yosef T,Blumenfeld A,Jalas C,Banin E,Sharon D

doi

10.1001/jamaophthalmol.2014.5251

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

312-8

issue

3

eissn

2168-6165

issn

2168-6173

pii

2084908

journal_volume

133

pub_type

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