[No authors listed]
INTRODUCTION:Among myoclonus-dystonia syndrome (MD) patients, psychiatric disorders including depression, anxiety, alcohol dependence, obsessive-compulsive disorder (OCD) and panic disorder have been frequently reported to be related with the epsilon-sarcoglycan gene (SGCE) mutation. However, the rate of psychiatric disorders has not been compared between MD patients with the SGCE mutation (SGCE (+)) and without the SGCE mutation (SGCE (-)). We analyzed the psychiatric data in both SGCE (+) and SGCE (-) MD patients to determine the association of the SGCE mutation with psychiatric disorders in MD. METHODS:Twenty-six MD patients who fulfilled the Grunewald's criteria and underwent a SGCE gene study were enrolled. Patients were divided into two groups according to their SGCE status (SGCE (+) and SGCE (-) group). They were systematically assessed using a standardized protocol including motor severity scales and psychiatric questionnaires for depression, anxiety, alcohol dependence, OCD and panic disorder. RESULTS:Fifteen SGCE (+) and eleven SGCE (-) patients were enrolled. Mean age at onset, disease duration, family history, alcohol responsiveness and motor severity were not different between the SGCE (+) and SGCE (-) group. Although more than half (53.8%) of all the MD patients had psychiatric symptoms, there were no significant differences between the SGCE (+) and SGCE (-) group in terms of their psychiatric questionnaire scores and rate of psychiatric disorders. CONCLUSIONS:Psychiatric features are not likely to be related with the SGCE mutation itself but just bespeak disability in clinical MD syndrome regardless of the SGCE mutation.
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