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Objective To create transgenic mice expressing hamster‐ and human‐PRNP as a model for understanding the physiological function and pathology of prion protein (PrP),as well as the mechanism of cross‐species transmission of transmissible spongiform encephalopathies (TSEs).Methods Hamster and human‐PRNP transgenic mice were established by conventional methods.The copy number of integrated PRNP in various mouse lines was mapped by real‐time PCR.PRNP mRNA and protein levels were determined by semi‐quantitative RT‐PCR,real‐time RT‐PCR,and western blot analysis.Histological analyses of transgenic mice were performed by hematoxylin and eosin (H & E) staining and immunohistochemical (IHC) methods.Results Integrated PRNP copy number in various mouse lines was 53 (Tg‐haPrP1),18 (Tg‐huPrP1),3 (Tg‐huPrP2),and 16 (Tg‐huPrP5),respectively.Exogenous PrPs were expressed at both the transcriptional and translational level.Histological assays did not detect any abnormalities in brain or other organs.Conclusion We have established one hamster‐PRNP transgenic mouse line and three human‐PRNP transgenic mouse lines.These four transgenic mouse lines provide ideal models for additional research.
Objective To create transgenic mice expressing hamster- and human-PRNP as a model for understanding the physiological function and pathology of prion protein (PrP), as well as the mechanism of cross-species transmission of transmissible spongiform encephalopathies (TSEs). Methods Hamster and human-PRNP transgenic mice were established by conventional methods. The copy number of integrated PRNP in various mouse lines was mapped by real-time PCR. PRNP mRNA and protein levels were determined by semi-quantitative RT-PCR, real-time RT- PCR , and western blot analysis. Histological analyzes of transgenic mice were performed by hematoxylin and eosin (H & E) staining and immunohistochemical (IHC) methods. Results Integrated PRNP copy number in various mouse lines was 53 (Tg-haPrP1), 18 (Tg-huPrP2), and 16 (Tg-huPrP5), respectively. Exogenous PrPs were expressed at both the transcriptional and translational level. Histological assays did not detect any abnormalities in brain or other organs. Confusion We have established one hamster-PRNP transgenic mouse line and three human-PRNP transgenic mouse lines. These four transgenic mouse lines provide ideal models for additional research.