Volume 49, Issue 1 pp. 121-124
Brief Communication

Inherited myoclonus-dystonia syndrome: Narrowing the 7q21-q31 locus in German families

Friedrich Asmus MD

Friedrich Asmus MD

Neurologische Klinik, Klinikum Großhadern, Ludwig-Maximilians-Universität, München, Germany

The first two authors contributed equally to this work.

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Alexander Zimprich MD

Alexander Zimprich MD

Neurologische Klinik, Klinikum Großhadern, Ludwig-Maximilians-Universität, München, Germany

The first two authors contributed equally to this work.

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Markus Naumann MD

Markus Naumann MD

Neurologische Klinik, Universität Würzburg, Würzburg, Germany

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Daniela Berg MD

Daniela Berg MD

Neurologische Klinik, Universität Würzburg, Würzburg, Germany

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Markus Bertram MD

Markus Bertram MD

Neurologische Klinik, Universität Heidelberg, Heidelberg, Germany

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Andres Ceballos-Baumann MD

Andres Ceballos-Baumann MD

Neurologische Klinik, Technische Universität, München, Germany

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Roswith Pruszak-Seel MD

Roswith Pruszak-Seel MD

Gesundheitsamt, Norden, Germany

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Christian Kabus MD

Christian Kabus MD

Neurologische Klinik, Humboldt Universität, Berlin, Germany

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Martin Dichgans MD

Martin Dichgans MD

Neurologische Klinik, Klinikum Großhadern, Ludwig-Maximilians-Universität, München, Germany

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Sigrid Fuchs PhD

Sigrid Fuchs PhD

Abteilung für Tropenmedizinische Grundlagenforschung, Bernhard-Nocht Institut für Tropenmedizin, Hamburg, Germany

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Bertram Müller-Myhsok MD

Bertram Müller-Myhsok MD

Abteilung für Tropenmedizinische Grundlagenforschung, Bernhard-Nocht Institut für Tropenmedizin, Hamburg, Germany

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Thomas Gasser MD

Corresponding Author

Thomas Gasser MD

Neurologische Klinik, Klinikum Großhadern, Ludwig-Maximilians-Universität, München, Germany

Neurologische Klinik, Ludwig-Maximilians-Universität, München Marchioninistrasse 15, D-81377 München, GermanySearch for more papers by this author

Abstract

Genetic studies were performed in four German families with autosomal dominant myoclonus-dystonia syndrome. Mutations in the D2 dopamine receptor gene, which have been implicated in this disorder, were excluded in all four families by linkage analysis and direct sequencing. All four families supported linkage to the second reported locus on chromosome 7q21 with a combined maximum multipoint lod score of 5.99. The observation of key recombinations in one family refined the disease locus to a 7.2 cM region flanked by the markers D7S652 and D7S2480. Ann Neurol 2001;49:121–124

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