La maladie de Parkinson en France (serveur d'exploration)

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A genetic cluster of early onset Parkinson's disease in a Colombian population

Identifieur interne : 000B59 ( Istex/Curation ); précédent : 000B58; suivant : 000B60

A genetic cluster of early onset Parkinson's disease in a Colombian population

Auteurs : Nicolas Pineda-Trujillo [Royaume-Uni, Colombie] ; Maria Apergi [Royaume-Uni] ; Sonia Moreno [Colombie] ; William Arias [Colombie] ; Suzanne Lesage [France] ; Alejandro Franco [Colombie] ; Diego Sepulveda-Falla [Colombie] ; David Cano [Colombie] ; Omar Buriticá [Colombie] ; David Pineda [Colombie] ; Carlos Santiago Uribe [Colombie] ; Justo Garcia De Yebenes [Espagne] ; Andrew J. Lees [Royaume-Uni] ; Alexis Brice [France] ; Gabriel Bedoya [Colombie] ; Francisco Lopera [Colombie] ; Andres Ruiz-Linares [Royaume-Uni, Colombie]

Source :

RBID : ISTEX:0C9FCE8D19391A0F4D97D715DF30E21D0598FC07

English descriptors

Abstract

We previously identified in two families with early onset Parkinson's Disease (PD) from the isolated population of Antioquia (Colombia), a parkin Cys212Tyr substitution caused by a G736A mutation. This mutation was subsequently observed in a Spanish family, suggesting that it could have been taken to Antioquia by Spanish immigrants. Here we screened for the G736A mutation in additional Antioquian early onset PD cases and used haplotype analysis to investigate the relationship between Spanish and Antioquian G736A chromosomes. We confirmed the occurrence of an extensive founder effect in Antioquia. Thirteen individuals (10 homozygotes) from seven nuclear families were identified with the G736A mutation. Genealogical investigations demonstrated the existence of shared ancestors between six of these families four to five generations ago and no evidence of Spanish ancestry during this period. A second parkin mutation (a duplication of exon 3), was detected in the three G736A heterozygote carriers. Haplotype data exclude a recent common ancestry between the Spanish and Antioquian patients studied here and is consistent with the introduction of the G736A mutation in Antioquia during early colonial times (about 16 generations ago). © 2006 Wiley‐Liss, Inc.

Url:
DOI: 10.1002/ajmg.b.30375

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ISTEX:0C9FCE8D19391A0F4D97D715DF30E21D0598FC07

Le document en format XML

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<title level="j">American Journal of Medical Genetics Part B: Neuropsychiatric Genetics</title>
<title level="j" type="abbrev">Am. J. Med. Genet.</title>
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<div type="abstract" xml:lang="en">We previously identified in two families with early onset Parkinson's Disease (PD) from the isolated population of Antioquia (Colombia), a parkin Cys212Tyr substitution caused by a G736A mutation. This mutation was subsequently observed in a Spanish family, suggesting that it could have been taken to Antioquia by Spanish immigrants. Here we screened for the G736A mutation in additional Antioquian early onset PD cases and used haplotype analysis to investigate the relationship between Spanish and Antioquian G736A chromosomes. We confirmed the occurrence of an extensive founder effect in Antioquia. Thirteen individuals (10 homozygotes) from seven nuclear families were identified with the G736A mutation. Genealogical investigations demonstrated the existence of shared ancestors between six of these families four to five generations ago and no evidence of Spanish ancestry during this period. A second parkin mutation (a duplication of exon 3), was detected in the three G736A heterozygote carriers. Haplotype data exclude a recent common ancestry between the Spanish and Antioquian patients studied here and is consistent with the introduction of the G736A mutation in Antioquia during early colonial times (about 16 generations ago). © 2006 Wiley‐Liss, Inc.</div>
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