title: NMDA receptor gene variations as modifiers in Huntington disease: a replication study.
abstract: Several candidate modifier genes which, in addition to the pathogenic CAG repeat expansion, influence the age at onset (AO) in Huntington disease (HD) have already been described. The aim of this study was to replicate association of variations in the N-methyl D-aspartate receptor subtype genes GRIN2A and GRIN2B in the "REGISTRY" cohort from the European Huntington Disease Network (EHDN). The analyses did replicate the association reported between the GRIN2A rs2650427 variation and AO in the entire cohort. Yet, when subjects were stratified by AO subtypes, we found nominally significant evidence for an association of the GRIN2A rs1969060 variation and the GRIN2B rs1806201 variation. These findings further implicate the N-methyl D-aspartate receptor subtype genes as loci containing variation associated with AO in HD.
authors: Carsten
authors: C
authors: Saft
authors: Jörg T
authors: JT
authors: Epplen
authors: Stefan
authors: S
authors: Wieczorek
authors: G Bernhard
authors: GB
authors: Landwehrmeyer
authors: Raymund A C
authors: RA
authors: Roos
authors: Justo Garcia
authors: JG
authors: de Yebenes
authors: Matthias
authors: M
authors: Dose
authors: Sarah J
authors: SJ
authors: Tabrizi
authors: David
authors: D
authors: Craufurd
authors: Larissa
authors: L
authors: Arning