项目名称: MFG-E8诱导前列腺肿瘤细胞血管新生表型转换调控肿瘤休眠机制研究
项目编号: No.81502222
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 医药、卫生
项目作者: 朱建华
作者单位: 华中科技大学
项目金额: 18万元
中文摘要: 近来研究表明肿瘤细胞血管新生表型转换是调控肿瘤休眠关键因素,但其具体机制不明。本课题组前期研究发现肿瘤休眠逃逸的前列腺肿瘤组织中具有血管新生表型肿瘤细胞高表达MFG-E8, MFG-E8与STAT3(Tyr-705)磷酸化和VEGF表达上调关系密切,我们提出“MFG-E8通过激活前列腺肿瘤细胞STAT3/VEGF诱导血管新生表型转换调控肿瘤休眠”的假说。本课题首先研究MFG-E8在肿瘤细胞血管新生表型转换的作用,进一步研究MFG-E8激活STAT3/VEGF诱导前列腺肿瘤细胞血管新生表型转换的分子机制,最后在动物模型中探讨MFG-E8对肿瘤休眠的影响。通过分子-细胞-动物三个层次的研究,本项目将阐明MFG-E8在肿瘤休眠中的作用,揭示MFG-E8调控前列腺肿瘤休眠的分子机制,有效诱导或维持肿瘤休眠,为寻求肿瘤治疗新靶点提供实验基础。
中文关键词: 前列腺肿瘤;肿瘤休眠;乳脂球表皮生长因子8;血管新生表型转换
英文摘要: Recent studies have shown that angiogenic switch is a key factor which regulating tumor dormancy, however, its mechanism remains unclear. Our previous study found that the angiogenic tumor cell isolated from prostate tumor tissue which escaping from dormancy overexpressed MFG-E8, and MFG-E8 was largely related to STAT3 (Tyr-705) phosphorylation and up-regulation of VEGF. Therefore, we hypothesize that MFG-E8 activates STAT3/VEGF to induce tumor cell angiogenic switch and regulate prostate tumor dormancy. First, we aim to investigate the role of MFG-E8 in prostate tumor cell angiogenic switch. Secondly, we further explore the molecular mechanism of MFG-E8 activating STAT3/VEGF to induce prostate tumor cell angiogenic switch. Finally, we investigate whether MFG-E8 influence tumor dormancy in vivo. Taken together, our study will elucidate the role of MFG-E8 in tumor dormancy, reveal the molecular mechanism of MFG-E8 regulating prostate tumor dormancy in molecule, cell and animal level, induce and maintain tumor dormancy providing a potential therapeutic target for tumor treatment.
英文关键词: prostate tumor;tumor dormancy;MFG-E8;angiogenic switch