A Novel Homozygous Gly107Arg Mutation in the RDH5 Gene in a Japanese Patient with Fundus albipunctatus with Sectorial Retinitis pigmentosaSato M. · Oshika T. · Kaji Y. · Nose H.
Departments of Ophthalmology,aUniversity Hospital of Tsukuba and bInstitute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
We examined the RDH5 gene for mutations in two unrelated Japanese families with fundus albipunctatus. Each proband with fundus albipunctatus in two families (family A’s case was atypical with sectorial retinitis pigmentosa, while family B’s case was typical), and 2 obligate carriers underwent molecular analysis of their RDH5 gene. DNA was amplified for all coding exons of the RDH5 gene with established primer pairs, and sequenced directly. Each family had a different mutation in the RDH5 gene. Family A had a homozygous mutation (Gly107Arg) while family B had a compound heterozygous mutation (Arg280His and Leu310GluVal). The obligate carriers were heterozygous with the wild-type and mutant-type alleles. The homozygous Gly107Arg mutation in the RDH5 gene described in this paper has not previously been described, though compound heterozygous mutations (Gly107Arg and Leu310GluVal) in the RDH5 gene have previously been reported.
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