期刊
CLINICAL GENETICS
卷 75, 期 1, 页码 86-91出版社
WILEY
DOI: 10.1111/j.1399-0004.2008.01038.x
关键词
15q22-23; deafness; DFNB48; retinitis pigmentosa; Usher syndrome; USH1H; vestibular dysfunction
资金
- Higher Education Commission, Islamabad, Pakistan
- Ministry of Science and Technology, Islamabad, Pakistan
- National Institute on Deafness and Other Communication Disorders
- National Institutes of Health [1 ZO1 DC000039-11]
Usher syndrome (USH) is a hereditary disorder associated with sensorineural hearing impairment, progressive loss of vision attributable to retinitis pigmentosa (RP) and variable vestibular function. Three clinical types have been described with type I (USH1) being the most severe. To date, six USH1 loci have been reported. We ascertained two large Pakistani consanguineous families segregating profound hearing loss, vestibular dysfunction, and RP, the defining features of USH1. In these families, we excluded linkage of USH to the 11 known USH loci and subsequently performed a genome-wide linkage screen. We found a novel USH1 locus designated USH1H that mapped to chromosome 15q22-23 in a 4.92-cM interval. This locus overlaps the non-syndromic deafness locus DFNB48 raising the possibility that the two disorders may be caused by allelic mutations.
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