Narcolepsy 3

Watchlist
Retrieved
2019-09-22
Source
Trials
Genes

For a phenotypic description and a discussion of genetic heterogeneity of narcolepsy, see 161400.

Mapping

Dauvilliers et al. (2004) reported a large French family in which 4 members had narcolepsy-cataplexy and 10 others had a milder form with isolated recurrent naps or lapses into sleep. The disorder was inherited in an autosomal dominant pattern. Genomewide linkage analysis identified a 5.15-Mb (12.6-cM) candidate region between markers D21S267 and ABCG1 on chromosome 21q, yielding a maximum 2-point lod score of 3.36 at D21S1245 and a maximum multipoint parametric lod score of 4.00 at 21GT26K. Two patients with the more severe form and 6 patients with the milder form were DQB1*0602-positive. A shared haplotype was observed in all affected individuals. Molecular analysis of the PEP19 gene (601629) revealed no mutations.