TorsinA immunoreactivity in brains of patients with DYT1 and non-DYT1 dystonia.

A mutation of the DYT1 gene, which codes for torsinA, has been identified as the cause of one form of autosomal dominantly inherited dystonia. TorsinA immunohistochemistry was used to examine a case of DYT1, and several cases of non-DYT1, dystonia. No evidence was found for alterations of immunoreactivity at the light microscopic level, specifically neither cytoplasmic aggregations nor colocalization of torsinA immunoreactivity with a marker for endoplasmic reticulum. These findings contrast with results of recent cell culture studies of torsinA.