Narcolepsy 6, Susceptibility To

Watchlist
Retrieved
2019-09-22
Source
Trials
Genes

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

Mapping

Kornum et al. (2011) reported genomewide association analyses for narcolepsy with replication and fine mapping across 3 ethnic groups (3,406 individuals of European ancestry, 2,414 Asians, and 302 African Americans) and identified a single-nucleotide polymorphism (SNP) in a 3-prime untranslated region of the purinergic receptor subtype P2Y11 gene (P2RY11) on chromosome 19p13.2 associated with narcolepsy (rs2305795, combined p = 6.1 x 10(-10), OR = 1.28, 95% CI 1.19-1.39, n = 5689). The disease-associated allele was correlated with reduced expression of P2RY11 in CD8+ T lymphocytes (339% reduced, p = 0.003) and natural killer cells (P = 0.031), but not in other peripheral blood mononuclear cell types. The low-expression variant was also associated with reduced P2RY11-mediated resistance to ATP-induced cell death in T lymphocytes (p = 0.0007) and natural killer cells (P = 0.001). Kornum et al. (2011) concluded that their results identified P2RY11 as an important regulator of immune cell survival, with possible implications in narcolepsy and other autoimmune diseases.