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25 April 2024

» pubmed » pmid12690204

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Balancing selection at the prion protein gene consistent with prehistoric kurulike epidemics
Simon Mead ; Michael P H Stumpf ; Jerome Whitfield ; Jonathan A Beck ; Mark Poulter ; Tracy Campbell ; James B Uphill ; David Goldstein ; Michael Alpers ; Elizabeth M C Fisher ; John Collinge ;
Date:	25 Apr 2003
Journal:	Science, 300 (5619), 640-3
Abstract:	Kuru is an acquired prion disease largely restricted to the Fore linguistic group of the Papua New Guinea Highlands, which was transmitted during endocannibalistic feasts. Heterozygosity for a common polymorphism in the human prion protein gene (PRNP) confers relative resistance to prion diseases. Elderly survivors of the kuru epidemic, who had multiple exposures at mortuary feasts, are, in marked contrast to younger unexposed Fore, predominantly PRNP 129 heterozygotes. Kuru imposed strong balancing selection on the Fore, essentially eliminating PRNP 129 homozygotes. Worldwide PRNP haplotype diversity and coding allele frequencies suggest that strong balancing selection at this locus occurred during the evolution of modern humans.
Source:	PubMed, pmid12690204 doi: 10.1126/science.1083320
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