Unchanged survival rates of Shadoo knockout mice after infection with mouse-adapted scrapie.

Previous studies have demonstrated that Shadoo (Sho), a GPI-linked glycoprotein encoded by the Sprn gene with a membrane localization similar to PrP(C), is reduced in the brains of rodents with terminal prion disease. To determine the functional significance of Sho in prion disease pathogenesis, Sho-deficient mice were generated by gene targeting. Sho knockout and control wild-type (WT) mice were infected with themouse-adapted scrapie strains 22L or RML. No significant differences in survival, the incubation period of prion disease or other disease features were observed between Sho mutant and WT mice. In this model of prion disease, Sho removal had no effect on disease pathogenesis.

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