项目名称: 错配修复介导的细胞凋亡相关蛋白的鉴定筛选及功能研究
项目编号: No.31500668
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 生物科学
项目作者: 陈希
作者单位: 武汉大学
项目金额: 20万元
中文摘要: DNA错配修复系统(MMR)可以通过介导DNA损伤应答的方式诱导细胞凋亡,从而维持生物体内基因组稳定性。缺失MMR的细胞不仅易发生癌化,而且对化疗试剂(例如烷基化试剂MNNG)显现出极强抗性。为了探求MMR介导细胞凋亡的具体机制,我们计划通过高通量定量蛋白质组学方法研究TK6细胞(MMR野生型)和MT1细胞(MMR缺陷性)应对MNNG刺激后蛋白质表达量水平和磷酸化修饰水平发生的差异变化。我们的初期实验数据显示,一系列功能蛋白与MMR依赖型细胞凋亡调控密切相关。在后续研究中,一方面我们利用更先进的质谱分析系统拓展蛋白质组学数据的深度和广度,力求发现更多MMR依赖型细胞凋亡调控相关蛋白;另一方面我们采取分子生物学手段验证筛选出的功能蛋白,为MMR缺陷型癌症治疗提供潜在的分子靶标。
中文关键词: 基于质谱的定量蛋白质组学;错配修复系统;细胞凋亡
英文摘要: Mediating DNA damage-induced apoptosis is an important genome-maintenance function of the mismatch repair (MMR) system. Defects in MMR not only cause carcinogenesis, but also render cancer cells highly resistant to chemotherapeutics, including alkylating agents (such as MNNG). To understand the mechanisms of MMR-mediated apoptosis and MMR-deficiency-caused drug resistance, we plan to analyze the differential changes at the level of protein expression and phosphorylation modification in MNNG-treated TK6 (MMR-proficient) and MT1 (MMR-deficient) cells by high-throughput quantitative proteomic approach. Our preliminary data demonstrate that a series of functional proteins are related to MMR-dependent apoptosis. In the future, we will explore the depth and breadth of proteome through more advanced LC-MS/MS analysis system, in order to discover more functional proteins involved in MMR-mediated apoptosis. Furthermore, we will focus on the validation of screened functional proteins, expecting to provide potential molecular target for the therapy of MMR-deficient cancer.
英文关键词: MS-based quantitative proteomics;mismatch repair system;apoptosis