Title: An Augmented ABCA4 Screen Targeting Non-coding Regions Reveals a Deep Intronic Founder Variant in Belgian Stargardt Patients
Authors: Bauwens, Miriam ×
De Zaeytijd, Julie
Weisschuh, Nicole
Kohl, Susanne
Meire, Françoise
Dahan, Karin
Depasse, Fanny
De Jaegere, Sarah
de Ravel de l'Argentière, Thomy
De Rademaeker, Marjan
Loeys, Bart
Coppieters, Frauke
Leroy, Bart P
De Baere, Elfride #
Issue Date: Jan-2015
Series Title: Human mutation vol:36 issue:1 pages:39-42
Article number: 10.1002/humu.22716
Abstract: Autosomal recessive Stargardt disease (STGD1) is hallmarked by a large proportion of patients with a single heterozygous causative variant in the disease gene ABCA4. Braun et al. (2013) reported deep intronic variants of ABCA4 in STGD1 patients with one coding variant, prompting us to perform an augmented screen in 131 Belgian STGD1 patients with one or no ABCA4 variant to uncover deep intronic causal ABCA4 variants. This revealed a second variant in 28.6% of cases. Twenty-six percent of these carry the same causal variant c.4539+2001G>A (V4). Haplotyping in V4 carriers showed a common region of 63 kb, suggestive of a founder mutation. Genotype-phenotype correlations suggest a moderate-to-severe impact of V4 on the STGD1 phenotype. In conclusion, V4 occurs in a high fraction of Belgian STGD1 patients and represents the first deep intronic founder mutation in ABCA4. This emphasizes the importance of augmented molecular genetic testing of ABCA4 in Belgian STGD1. This article is protected by copyright. All rights reserved.
ISSN: 1059-7794
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Human Genetics - miscellaneous
× corresponding author
# (joint) last author

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