Genetic analysis of idiopathic torsion dystonia in Ashkenazi Jews and their recent descent from a small founder population

Neil Risch, Deborah de Leon, Laurie Ozelius, Patricia Kramer, Laura Almasy, Burton Singer, Stanley Fahn, Xandra Breakefield, Susan Bressman

Research output: Contribution to journalArticle

332 Scopus citations

Abstract

We have examined data on six closely linked microsatellite loci on chromosome 9q34 from 59 Ashkenazi Jewish families with idiopathic torsion dystonia (ITD). Our data show that the vast majority (>90%) of early–onset ITD cases in the Ashkenazi population are due to a single founder mutation, which we estimate first appeared approximately 350 years ago. We also show that carriers preferentially originate from the northern part of the historic Jewish Pale of settlement (Lithuania and Byelorussia). The recent origin of this dominant mutation and its current high frequency (between 1/6, 000 and 1/2, 000) suggest that the Ashkenazi population descends from a limited group of founders, and emphasize the importance of genetic drift in determining disease allele frequencies in this population.

Original languageEnglish (US)
Pages (from-to)152-159
Number of pages8
JournalNature genetics
Volume9
Issue number2
DOIs
StatePublished - Feb 1995

ASJC Scopus subject areas

  • Genetics

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    Risch, N., de Leon, D., Ozelius, L., Kramer, P., Almasy, L., Singer, B., Fahn, S., Breakefield, X., & Bressman, S. (1995). Genetic analysis of idiopathic torsion dystonia in Ashkenazi Jews and their recent descent from a small founder population. Nature genetics, 9(2), 152-159. https://doi.org/10.1038/ng0295-152