中科院昆明动物所和云南大学在疯牛病调控基因研究中取得新进展,其最新研究结果近日发布在《PLoS One》杂志上。研究显示,Shadoo蛋白在疯牛病这样的朊病毒疾病的感染和发展中并非一个“旁观者”。
现有的研究表明,朊病毒疾病是一类致死性神经退行性疾病,已包括人在内的10多种动物中发现,例如牛的疯牛病、羊的搔痒症、人的克雅氏症等。25年来,学界已达成朊病毒基因是朊病毒疾病致病基质的共识,但仅这一个基因还是无法彻底澄清朊病毒疾病的致病机理。近年来,一个名为SPRN的基因及其编码的蛋白Shadoo在朊病毒疾病中的作用越来越受到人们的关注,研究人员推测,该基因可能作为抑制因子,参与调控着朊病毒疾病的发展进程。
昆明动物研究所张亚平院士、云南大学赵卉副教授和刘林林硕士通过研究和实验发现,具有疯牛病抗性的水牛大脑Shadoo蛋白的表达量高于对疯牛病敏感的黄牛,该结果与他们的预期设想相吻合。虽然目前Shadoo蛋白在疾病中的作用尚未彻底澄清,但他们的研究结果支持Shadoo在朊病毒的感染和发展中并不是一个“旁观者”的观点。此研究为朊病毒疾病生化学的研究提供了线索。

Comparative Analysis of the Shadoo Gene between Cattle and Buffalo Reveals Significant Differences
Hui Zhao, Lin-Lin Liu, Shou-Hui Du, Si-Qi Wang, Ya-Ping Zhang
While prions play a central role in the pathogenesis of transmissible spongiform encephalopathies, the biology of these proteins and the pathophysiology of these diseases remain largely unknown. Since no case of bovine spongiform encephalopathy (BSE) has ever been reported in buffalo despite their phylogenetic proximity to cattle, genetic differences may be driving the different susceptibilities of these two species to BSE. We thus hypothesized that differences in expression of the most recently identified member of the prion family or Shadoo (SPRN) gene may relate to these species-specific differences.
文献链接:Comparative Analysis of the Shadoo Gene between Cattle and Buffalo Reveals Significant Differences

