中国农业科学 ›› 2013, Vol. 46 ›› Issue (9): 1932-1938.doi: 10.3864/j.issn.0578-1752.2013.09.021

• 兽医 • 上一篇    下一篇

细胞型朊蛋白在BV2小神经胶质细胞体外激活中的作用

 付永瑶, 师福山, 王继宏, 杨利峰, 周向梅, 尹晓敏, 赵德明   

  1. 中国农业大学动物医学院/国家动物海绵状脑病实验室,北京100193
  • 收稿日期:2012-01-07 出版日期:2013-05-01 发布日期:2013-03-30
  • 通讯作者: 通信作者赵德明,Tel:010-62732975;E-mail:zhaodm@cau.edu.cn
  • 作者简介:付永瑶,Tel:010-62736980;E-mail:fyyabu@126.com
  • 基金资助:

    国家自然科学基金(31172293)、国家科技支撑计划(2011BAI15B01)

Effects of Prion Protein on the Regulation of Classical and Alternative Activation of BV2 Microglia in vitro

 FU  Yong-Yao, SHI  Fu-Shan, WANG  Ji-Hong, YANG  Li-Feng, ZHOU  Xiang-Mei, YIN  Xiao-Min, ZHAO  De-Ming   

  1. Laboratory of National Animal TSE/College of Veterinary Medicine, China Agricultural University, Beijing 100193
  • Received:2012-01-07 Online:2013-05-01 Published:2013-03-30

摘要: 【目的】研究细胞型朊蛋白对小神经胶质细胞不同激活方式的影响。【方法】用IFN-γ、IL-4和IL-10分别刺激BV2细胞,RT-PCR方法检测PrPC的mRNA表达量。SiRNA干扰将PrPC沉默,用上述因子刺激细胞,用RT-PCR和Western-blot检测相关参数。【结果】用IFN-γ、IL-4和IL-10分别刺激小神经胶质细胞后可导致PrPC的mRNA表达量下降;PrPC沉默后的小神经胶质细胞对IFN-γ刺激的反应应答减弱;PrPC沉默可以显著地改变由IL-4诱导的神经胶质细胞的激活表型;但是对IL-10诱导的小神经胶质细胞激活却没有影响。【结论】PrPC既能影响小神经胶质细胞从静止状态到激活状态的转换,也在小神经胶质细胞的经典激活和替代激活途径中发挥调节作用。

关键词: 小干扰RNA , 朊蛋白 , 小神经胶质细胞 , 激活

Abstract: 【Objective】 The purpose of this study is to investigate the effects of PrPC on various forms of microglial activation. 【Method】 BV2 microglia were treated, respectively, with IFN-γ, IL-4, or IL-10, and the mRNA expression of PRNP was examined by RT-PCR. Then the effects of si-RNA-mediated disruption of PRNP on different parameters of microglial activation in IFN-γ, IL-4, or IL-10-stimulated microglia were analyzed by RT-PCR and western-blot. 【Result】PRNP mRNA expression was invariably downregulated in microglia upon exposure to IFN-γ, IL-4, or IL-10. PRNP silencing prior to cytokines treatment reduced the responsiveness of microglia to INF-γ treatment, significantly altered IL-4-induced microglial activation phenotype, and had no effect on IL-10-induced microglial activation.【Conclusion】Together, these results support a role of PrPC in the modulation of the shift of microglia from a quiescent state to an activated phenotype and in the regulation of the microglial response during classical and alternative activation.

Key words: SiRNA , prion protein , microglia , activation