A novel frameshift mutation of SYNE1 in a Japanese family with autosomal recessive cerebellar ataxia type 8.

A Japanese family with autosomal recessive cerebellar ataxia type 8 (SCAR8, MIM 610743) is described. We identified a novel SYNE1 frameshift deletion (c.6843del, p.Q2282Sfs*3). This family shared similar clinical manifestations characterized by adult-onset, relatively pure cerebellar ataxia with mild eye movement abnormality. Intelligence and bulbar and respiratory functions were unaffected. This study suggests the clinical utility of using panel-based exome sequencing for genetic diagnosis in hereditary ataxias in a cost-efficient manner.