项目名称: 传染性法氏囊病病毒蛋白VP5与靶蛋白VDAC2相互作用引起细胞凋亡分子机理的研究
项目编号: No.31272543
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 农业科学
项目作者: 郑世军
作者单位: 中国农业大学
项目金额: 80万元
中文摘要: 摘要:鸡传染性法氏囊病(IBD)是由鸡传染性法氏囊病病毒(IBDV)引起的鸡的一种急性、高度传染性和免疫抑制性疾病。由于IBDV感染严重损伤靶器官(鸡的法氏囊),致使病鸡存活后出现严重的免疫抑制,容易继发感染多种疾病。然而,IBDV如何引起细胞凋亡和免疫抑制的分子机理还不清楚。我们在前期的研究中,通过酵母双杂交以及免疫沉淀技术发现IBDV VP5通过结合宿主细胞靶蛋白VDAC2诱导细胞凋亡、促进病毒扩散。在此基础上,我们开展该课题的研究,进一步探索VP5与VDAC2结合的分子机理,研究VP5与VDAC2相互作用的关键氨基酸位点、测定VP5与VDAC2结合的亲合力(Kd)以及确定VP5与VDAC2互作信号传递的接头分子,并验证BAK与Bid是否参与VP5诱导的细胞凋亡过程,深入解析VP5在IBDV致病机理中的作用,为揭示IBDV引起细胞凋亡的机理提供依据,也为其他病原致病机理的研究提供参考。
中文关键词: 传染性法氏囊病毒;VP5;细胞凋亡;VDAC2;RACK1
英文摘要: Infectious Bursal Disease (IBD) is an acute, highly contagious and immunosuppressive avian disease caused by IBD virus (IBDV). IBDV infection causes severe damages in Bursa of Fabricius as target organ, leading to deep immunosuppression in hosts that increases their susceptibility to secondary infections. Although IBDV-induced host cell apoptosis has been established, the underlying molecular mechanism is still unclear. Based on our previous report that IBDV VP5 via interacting with the voltage-dependent anion channel 2 (VDAC2) induces apoptosis associated with facilitation of IBDV dissemination in host cells, we further investigate the molecular mechanism underlying VP5-VDAC2 interaction and determine the crucial amino acids and binding affinity (Kd) for such interaction, searching for the molecules recruited to VDAC2 and examining the involvement of BAK and Bid in VP5-induced apoptosis. This project will further our understandings of the role of VP5 in IBDV-induced pathogenesis and provide rationale to the formation of theory in explanation of IBDV-induced apoptosis, and also help to elucidate the pathogenesis of other pathogens.
英文关键词: IBDV;VP5;apoptosis;VDAC2;RACK1