A de novo ADCY5 mutation causes early-onset autosomal dominant chorea and dystonia.
Fiche publication
Date publication
mars 2015
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BAHRAM Siamak
Tous les auteurs :
Carapito R, Paul N, Untrau M, Le Gentil M, Ott L, Alsaleh G, Jochem P, Radosavljevic M, Le Caignec C, David A, Damier P, Isidor B, Bahram S
Lien Pubmed
Résumé
IMPORTANCE: Apart from Huntington's disease, little is known of the genetics of autosomal dominant chorea associated with dystonia. Here we identify adenylate cyclase 5 (ADCY5) as a likely new causal gene for early-onset chorea and dystonia. OBSERVATIONS: Whole exome sequencing in a three-generation family affected with autosomal dominant chorea associated with dystonia identified a single de novo mutation-c.2088+1G>A in a 5' donor splice-site of ADCY5-segregating with the disease. This mutation seeming leads to RNA instability and therefore ADCY5 haploinsufficiency. CONCLUSIONS AND RELEVANCE: Our finding confirms the genetic/clinical heterogeneity of the disorder; corroborated by previous identification of ADCY5 mutations in one family with dyskinesia-facial myokymia and in two unrelated sporadic cases of paxoysmal choreic/dystonia-facial myokymia; ADCY5's high expression in the striatum and movement disorders in ADCY5-deficient mice. Hence ADCY5 genetic analyses may be relevant in the diagnostic workup of unexplained early-onset hyperkinetic movement disorders.
Référence
Mov Disord. 2015 Mar;30(3):423-7