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• W2005969043 abstract "Prion diseases are fatal transmissible neurodegenerative diseases of humans and various vertebrate species. In their natural hosts these conditions are characterised by prolonged incubation times prior to the onset of clinical signs of terminal disease. Accordingly, tractable models of mammalian prion disease are required in order to better understand the mechanisms of prion replication and prion-induced neurotoxicity. Transmission of prion diseases can occur across a species barrier and this is facilitated in recipients transgenic for the same PrP gene as the individual from which the infectious prions are derived. Here we have tested the hypothesis that exogenous ovine prions can induce neurotoxicity in Drosophila melanogaster transgenic for ovine PrP. Drosophila that expressed ovine PrP pan neuronally and inoculated with ovine prions at the larval stage by oral exposure to scrapie-infected sheep brain homogenate showed markedly accelerated locomotor and survival defects. ARQ PrP transgenic Drosophila exposed to scrapie-infected brain homogenate showed a significant and progressive reduction in locomotor activity compared to similar flies exposed to normal sheep brain homogenate. The prion-induced locomotor defect was accompanied by the accumulation of potentially misfolded PrP in the brains of prion-inoculated flies. VRQ PrP transgenic Drosophila, which expressed less ovine PrP than ARQ flies, showed a reduced median survival compared to similar flies exposed to normal sheep brain homogenate. These prion-induced phenotypic effects were PrP-mediated since ovine prions were not toxic in non-PrP transgenic control flies. Our observations provide the basis of an invertebrate model of transmissible mammalian prion disease." @default.
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• W2005969043 date "2012-04-01" @default.
• W2005969043 modified "2023-09-27" @default.
• W2005969043 title "Prion-induced toxicity in PrP transgenic Drosophila" @default.
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• W2005969043 doi "https://doi.org/10.1016/j.yexmp.2012.01.005" @default.
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