项目名称: NOTCH1调控的靶基因DEPTOR促进急性T淋巴细胞白血病的机制和功能研究
项目编号: No.81470332
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 刘胡丹
作者单位: 华中科技大学
项目金额: 75万元
中文摘要: 急性T淋巴细胞白血病(T-ALL)是一种常见儿童血液癌症疾患,无特效治疗药物,严重威胁未成年白血病患者的生命和健康。申请人前期研究表明,异常激活的NOTCH1在T-ALL病理过程中发挥重要作用,并通过全基因组表达谱分析鉴定出NOTCH1转录激活的新型靶基因DEPTOR,推测DEPTOR可能介导T-ALL病程中信号通路的相互交流,但其分子机制尚不明确。本项目拟通过分子生物学、细胞生物学和模式动物等学科交叉的研究方法,探讨DEPTOR在T-ALL病理过程中的功能:①利用细胞系分析DEPTOR在T-ALL细胞中的调控机制;②采用斑马鱼模型研究DEPTOR在T-ALL发生过程中的致病机理; ③采用小鼠模型探索DEPTOR在T-ALL病程发展维持中的作用。本项目预期成果可望揭示T-ALL发病的新机制,诠释DEPTOR在T-ALL发病过程中的作用,以期为针对DEPTOR的白血病靶向治疗提供理论依据。
中文关键词: 儿童急性淋巴细胞白血病;信号通路;发病机制;靶向治疗;分子生物学
英文摘要: Acute T-cell lymphoblastic leukemia (T-ALL) is a common aggressive and life-threatening hematological malignancy often occurring in children and adolescents, yet molecular pathogenesis of which remains unclear. We previously reported the important role of activated NOTCH1 in T-ALL pathogenesis and carried out the genome-wide microarray analyis to identify a novel downstream target gene DEPTOR. Our preliminary data show that DEPTOR likely mediates the crosstalk of oncogenic signaling pathways in T-ALL, the precise mechanism of which remains to be determined. We aim to understand whether and how NOTCH1-induced DEPTOR functions to put forward T-ALL. Using combinatory approaches of molecular biology, cellular biology and animal modeling, we will ① determine how DEPTOR is regulated and how DEPTOR modulates other signaling pathways in T-ALL cell lines; ② study whether and how DEPTOR is required in leukemia onset in zebrafish T-ALL models; ③ examine whether and how DEPTOR is essential for T-ALL maintenance in xenograft and bone marrow transplant mouse models. This DEPTOR study will help decipher the molecular pathogenesis of T-ALL and possibly translate into a novel therapeutic strategy targeting DEPTOR for T-ALL treatments.
英文关键词: Pediatric acute lymphoblastic leukemia;Signaling transduction;Pathogenesis;Targeted therapy;Molecular biology