Establishment of a Stable PrP^(Sc) Panel from Brain Tissues of Experimental Hamsters with Scrapie Strain 263K  

作　　者：BAO-YUN ZHANG CHAN TIAN JUN HAN CHEN GAO QI SHI JIAN-MING CHEN HUI-YING JIANG WEI ZHOU AND XIAO-PING DONG 

机构地区：[1]State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100052, China

出　　处：《Biomedical and Environmental Sciences》2009年第2期151-156,共6页生物医学与环境科学（英文版）

基　　金：supported by National Science and Technology Task Force Project (2006BAD06A13-2);National Basic Research Program of China (973 Program) (2007CB310505);Institution Technique R&D Grand (2008EG150300);National Natural ScienceFoundation of China (Grants 30571672, 30500018, 30771914, and 30800975)

摘　　要：Objective To establish a stable PrP^Sc panel from brain tissues of experimental hamsters infected with scrapie agent 263K for evaluating diagnostic techniques of human and animals＇ prion diseases. Methods Thirty brain tissue samples from hamsters intracerebrally infected with scrapie strain 263K and another 30 samples from normal hamsters were selected to prepare 10%, 1%, and 0.5% brain homogenates, which were aliquoted into stocks. PrP^Sc in each brain homogenate was determined by proteinase K digestions followed by Western blot assay and partially by immunohistochemistry. Stability and glycoforms of PrP^Sc were repeatedly detected by prp^SC-specific Western blots in half a year and 3 years later. Results PrPsc signals were observed in all 10% brain homogenates of infected hamsters. Twenty out of 30 stocks and 19 out of 30 stocks were PrPsc positive in 1% and 0.5% brain homogenatesof infected hamsters, respectively. TWenty-seven out of 30 stocks presented three positive bands in 10% brain homogenates, whereas none of 1% and 0.5% homogenates contained 3 bands. The detection of prpSc-specific signals stored in half a year and 3 years later demonstrated that the ratio of PrPsc positive samples and glycoforms was almost unchanged. All normal hamsters＇ brain homogenates were PrP^Sc negative. Conclusion A PrP^Sc panel of prion disease can be established, which displays reliably stable prp^Sc-specific signals and glycoforms.Objective To establish a stable PrP^Sc panel from brain tissues of experimental hamsters infected with scrapie agent 263K for evaluating diagnostic techniques of human and animals＇ prion diseases. Methods Thirty brain tissue samples from hamsters intracerebrally infected with scrapie strain 263K and another 30 samples from normal hamsters were selected to prepare 10%, 1%, and 0.5% brain homogenates, which were aliquoted into stocks. PrP^Sc in each brain homogenate was determined by proteinase K digestions followed by Western blot assay and partially by immunohistochemistry. Stability and glycoforms of PrP^Sc were repeatedly detected by prp^SC-specific Western blots in half a year and 3 years later. Results PrPsc signals were observed in all 10% brain homogenates of infected hamsters. Twenty out of 30 stocks and 19 out of 30 stocks were PrPsc positive in 1% and 0.5% brain homogenatesof infected hamsters, respectively. TWenty-seven out of 30 stocks presented three positive bands in 10% brain homogenates, whereas none of 1% and 0.5% homogenates contained 3 bands. The detection of prpSc-specific signals stored in half a year and 3 years later demonstrated that the ratio of PrPsc positive samples and glycoforms was almost unchanged. All normal hamsters＇ brain homogenates were PrP^Sc negative. Conclusion A PrP^Sc panel of prion disease can be established, which displays reliably stable prp^Sc-specific signals and glycoforms.

关 键 词：TSE prp^Sc PANEL GLYCOFORMS Stability 

分 类 号：R651.15[医药卫生—外科学] R522[医药卫生—临床医学]