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Expression of the early-onset torsion dystonia gene (DYT1) in human brain

✍ Scribed by Sarah J. Augood; John B. Penney Jr; Ingrid K. Friberg; Xandra O. Breakefield; Anne B. Young; Laurie J. Ozelius; Dr David G. Standaert

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 748 KB
Volume: 43
Category: Article
ISSN: 0364-5134
DOI: 10.1002/ana.410430518

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Early‐onset torsion dystonia, an autosomal dominant disease associated with the DYT1 locus on 9q34, is the most frequent genetic form of dystonia. Recent work has revealed that the causative mutation in most cases is deletion of a glutamate residue from the carboxy terminal of torsinA, a 332 amino acid protein encoded by the DYT1 gene. To gain insight into how deletion of a single amino acid can produce such a profound movement disorder, we have mapped the expression of the DYT1 gene in normal human postmortem brain. DYT1 mRNA is highly enriched in the dopamine neurons of the substantia nigra pars compacta. Intense expression was also found in the cerebellum and hippocampal subfields. The prominent expression of the DYT1 gene within the substantia nigra pars compacta, which provides dopaminergic innervation to the basal ganglia, implicates a disturbance of dopaminergic function in the pathophysiology of early‐onset torsion dystonia.

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