A polymorphism in the dopamine receptor DRD5 is associated with blepharospasm.

Misbahuddin, A; Placzek, M R; Chaudhuri, K R; Wood, N W; Bhatia, K P; Warner, T T · Neurology · 2002

case_control · Level III

Where this comes from

Abstract

Abnormalities in dopamine neurotransmission are thought to underlie the generation of dystonic movements. The authors performed a case-control allelic association study in patients with the focal dystonia blepharospasm, using polymorphisms in the dopamine receptor and transporter genes. Allele 2 of a DRD5 dinucleotide repeat was significantly associated with blepharospasm. This may indicate a pathogenic role for this receptor.

Medical subject headings