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. 1990 Jun;46(6):1163–1177.

Autosomal dominant ataxia: Genetic evidence for locus heterogeneity from a cuban founder-effect population

Georg Auburger, Guillermo Orozco Diaz, Raul Ferreira Capote, Suzana Gispert Sanchez, Marta Paradoa Perez, Marianela Estrada del Cueto, Mirna Garcia Meneses, Martin Farrall, Robert Williamson, Susan Chamberlain, Luis Heredero Baute
PMCID: PMC1683834  PMID: 1971152

Abstract

The locus for autosomal dominant ataxia with a diagnosis of olivo-ponto-cerebellar atrophy at autopsy has been previously assigned to chromosome 6p. However, evidence for two alternative locations has been reported. We have recently described a large potential founder-effect population of such patients in the Holguin province of Cuba. With an estimated 1,000 patients available for analysis, this extensive cluster of families provides a unique opportunity for the definitive localization of the genetic mutation. Linkage analysis between the disease locus in this population and markers within and flanking the HLA region on chromosome 6 were undertaken in 12 families comprising over 100 affected individuals. Despite similarity in the clinical phenotype between those families where the disease locus has been reported to be linked to the HLA locus and the Cuban patients, no evidence of linkage to this region could be demonstrated in the latter. The disease locus was excluded from a 96-cM genetic interval of the short arm of chromosome 6, encompassing the F13A1–HLA–GLO1–MUT/D6S4 loci. These data strongly support the existence of genetic heterogeneity for the disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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