NR ABNQ
AU Bossers,A.; Schreuder,B.E.C.; Muileman,I.H.; Belt,P.B.G.M.; Smits,M.A.
TI PrP genotype contributes to determining survival times of sheep with natural scrapie
QU Journal of General Virology 1996 Oct; 77(10): 2669-73
PT journal article
AB Several allelic variants of the sheep PrP gene are associated with scrapie susceptibility. However, it is not known whether, and to what extent, the PrP genotype contributes to determining survival times of scrapie sheep. We therefore determined the PrP genotype and life spans of over 50 Flemish and Swifter sheep within a single scrapie-affected flock. Eighty-three per cent of the scrapie sheep were homozygous for the PrP(VQ) allele (polymorphic amino acids at codons 136 and 171 are indicated) and these sheep died from scrapie at a mean age of 25 months. In sheep heterozygous for PrP(VQ), development of scrapie was delayed or did not occur. Sheep with at least one PrP(AR) allele, including PrP(VQ)/PrP(AR) sheep, did not develop scrapie. No scrapie sheep were found without a PrP(VQ) allele. We conclude that the PrP genotype contributes to determining survival times of sheep with natural scrapie. Additionally, we describe two novel sheep PrP allelic variants.
MH Animal; DNA/analysis; Genotype; Polymorphism (Genetics); Prions/*genetics; Scrapie/*etiology/*mortality; Sheep; Sheep Diseases/*etiology/*mortality; Survivors; Time Factors
ZR 20 Zitate
AD Department of Bacteriology, DLO-Institute for Animal Science and Health, Lelystad, The Netherlands.
SP englisch
PO England
OR Prion-Krankheiten 2