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    Hum Genet. 2010 Feb;127(2):155-62. Epub 2009 Oct 22.

    Genetic variants in the RELN gene are associated with otosclerosis in multiple European populations.

    Schrauwen I, Ealy M, Fransen E, Vanderstraeten K, Thys M, Meyer NC, Cosgarea M, Huber A, Mazzoli M, Pfister M, Smith RJ, Van Camp G.

    Source

    Department of Medical Genetics, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium. isabelle.schrauwen@ua.ac.be

    Abstract

    Otosclerosis is a common form of hearing loss characterized by abnormal bone remodeling in the otic capsule. It is considered a complex disease caused by both genetic and environmental factors. In a previous study, we identified a region on chr7q22.1 located in the RELN gene that is associated with otosclerosis in Belgian-Dutch and French populations. Evidence for allelic heterogeneity was found in this chromosomal region in the form of two independent signals. To confirm this finding, we have completed a replication study that includes four additional populations from Europe (1,141 total samples). Several SNPs in this region replicated in these populations separately. While the power to detect significant association in each population is small, when all four populations are combined, six of seven SNPs replicate and show an effect in the same direction as in the previous populations. We also confirmed the presence of allelic heterogeneity in this region. These data further implicate RELN in the pathogenesis of otosclerosis. Functional research is warranted to determine the pathways through which RELN acts in the pathogenesis of otosclerosis.

    PMID:
    19847460
    [PubMed - indexed for MEDLINE]

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