αB-Crystallin genotype has impact on the multiple sclerosis phenotype

Abstract

BACKGROUND: Both multiple sclerosis (MS) susceptibility and MS clinical phenotype are in part genetically determined. [Alpha]B-crystallin is a candidate autoantigen in MS, and there are three polymorphisms in the promoter region of the encoding gene (CRYAB): at positions -C249G, -C650G, and -A652G. METHODS: These polymorphisms were studied in sporadic cases of MS, assessing disease susceptibility, clinical phenotype, and MRI appearance. RESULTS: The CRYAB polymorphisms influenced susceptibility as well as disease expression in MS. CONCLUSION: Carriers of the rare allele CRYAB-650*C had an increased likelihood of a noninflammatory, neurodegenerative phenotype characterized by a relatively rapid, primary progressive clinical disease course.