项目名称: 热休克蛋白抑制剂抑制疱疹病毒相关恶性肿瘤的分子机制
项目编号: No.31270205
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 生物科学
项目作者: 孙晓平
作者单位: 武汉大学
项目金额: 78万元
中文摘要: EB病毒和卡波氏肉瘤相关疱疹病毒这两种分类上很近的疱疹病毒能在人细胞内建立潜伏感染,并引起多种癌症以及其他非恶性肿瘤类病毒病。Hsp90 抑制剂如17-DMAG可破坏Hsp90 的融合功能而导致其客户蛋白的降解。申请人的前期研究发现17-DMAG明显抑制病毒肿瘤蛋白EBNA1的表达水平从而阻碍病毒相关的小鼠上的恶性肿瘤的生长(2010,PNAS),但EBV和KSHV蛋白中是否还有17-DAMG的作用靶标还不清楚。本项目拟在前期工作基础上,利用分子生物学手段鉴定17-DAMG的作用靶标,并解析其分子机制和进一步研究对相关恶性肿瘤的可能的抑制作用。这些研究将有助于明确Hsp90抑制剂是否可以作为治疗这两种病毒相关的多种疾病的新型治疗药物,并揭示17-DMAG在这两种病毒的编码蛋白中的作用谱。对于开辟治疗病毒引起的恶性肿瘤以及其他传染性、高致病力病毒性疾病具有重要的理论意义和实际应用价值。
中文关键词: 疱疹病毒;抑制剂;病毒;;
英文摘要: Epstein-Barr virus and Kaposi's sarcoma-associated herpesvirus are closely related γ-herpesviruses, which establish latent infection in human B cells and epithelial cells and induce various malignancies and non-malignancy virus diseases. Hsp90 (Heat shock protein 90) inhibitors, such as17-DMAG, compete with ATP for binding to Hsp90, thereby blocking the chaperoning function of Hsp90 and resulting in degradation of Hsp90 client proteins. Our previous studies found that 17-DMAG significantly decreases expression of EBV-encoded EBNA1, thus inhibiting growth of EBV-related tumors in SCID mice (Sun et al., PNAS, 2010). However, it remains unknown how many and what EBV and KSHV proteins are targeted by 17-DMAG. Based on our previous findings, this project will use molecular and biological methods to identify the viral proteins targeted by 17-DMAG, study the underlying mechanisms, and further determine the putative inhibitory roles of 17-DMAG on EBV- and KSHV-related malignancies. These aims will facilitate us to determine if Hsp90 inhibitors can be a novel drug for treatments of various EBV- and KSHV-related diseases. Also, these aims can develop a networking map of 17-DMAG targets on proteins encoded by these two herpesviruses. This project has important theoretical significances and practical values for treatment o
英文关键词: Herpesvirus ;Inhibitor;virus;;