Identification of effective signaling pathways for promoting bladder cancer cell survival has become an important frontier subject in the field of molecular oncology. Our recent series of work indicated the role of tumor suppressor and the molecular mechanism inducing apoptosis for the dependence receptor UNC5D. Further investigations showed that the miR-183-96-182 cluster with classic oncogenic characters can effectively inhibit the expression of UNC5D, and promote the survival of human bladder cancer cells. Moreover, the transcription factor E2F1, involved in the regulation of malignant progression of bladder cancer, could up-regulate the expression of miR-183-96-182 cluster.In this project, we aimed to further investigate the relationship of UNC5D with E2F1/miR-183-96-182 cluster in survival pathway through a series of molecular biology methods such as luciferase reporter assay, Chromatin Immunoprecipitation assay and DNA microarray. Furthermore, in vivo experiments from animals and clinical samples would be conducted to support the hypothesis that E2F1 transactivates miR-183-96-182 cluster, which promoting survival of bladder cancer cells via repressing UNC5D expression. The findings of this study may provide novel insights in demonstrating molecular mechanism of inhibiting UNC5D, the representative of the dependent receptor, from the new perspective of post-transcriptional regulation, providing a new target for the diagnosis, prognosis and treatment of bladder cancer, and offering effective solutions to solve failure of apoptosis induced.
鉴定并有效抑制膀胱癌细胞的促存活信号通路已成为分子肿瘤学领域的重要前沿课题。申请者近期的系列工作揭示了依赖性受体 UNC5D 在小儿、成人泌尿生殖系肿瘤中的抑癌基因作用及相关促凋亡分子机制。前期研究进一步发现,一个具有癌基因功能的microRNA簇miR-183-96-182能有效抑制UNC5D表达,促进膀胱癌细胞存活。而且,转录因子E2F1能上调miR-183-96-182簇的表达。本研究拟通过荧光素酶报告基因分析、染色质免疫沉淀及表达谱芯片等分子生物学方法,并结合细胞功能实验、体内动物实验与临床标本检测结果,力图证明E2F1 转录活化的miR-183-96-182簇抑制了UNC5D表达,进而促进了膀胱癌细胞存活的假说。本研究不仅从转录后调控的新视角探索了以UNC5D为代表的依赖性受体表达抑制的分子机制,为膀胱癌的诊断、预后和治疗提供了新靶点,更为解决凋亡诱导失效的难题提供了可能的方案。
鉴定并有效抑制膀胱癌细胞的促存活信号通路已成为分子肿瘤学领域的重要前沿课题。申请者近期的系列工作揭示了依赖性受体 UNC5D 在小儿、成人泌尿生殖系肿瘤中的抑癌基因作用及相关促凋亡分子机制。前期研究进一步发现,一个具有癌基因功能的microRNA簇miR-183-96-182能有效抑制UNC5D表达,促进膀胱癌细胞存活。而且,转录因子E2F1能上调miR-183-96-182簇的表达。本研究通过荧光素酶报告基因分析、染色质免疫沉淀及表达谱芯片等分子生物学方法,并结合细胞功能实验、体内动物实验与临床标本检测结果,证明了E2F1 转录活化的miR-183-96-182簇抑制了UNC5D表达,进而促进了膀胱癌细胞存活的假说。本课题组基于研究结果,发表SCI论文7篇,总影响因子32.6,其中(中科院分区)2区论文2篇,中文核心期刊论文3篇,并在国内专业会议进行学术交流。基于申请者在依赖性受体领域的系列工作,申请者受邀在cancer letters(中科院分区1区,IF 7.6) 撰写综述,阐释UNC5家族受体的研究历史和抑癌分子机制。关于膀胱癌的相关研究成果获辽宁省科学技术进步二等奖(申请者为第一完成人)。本研究不仅从转录后调控的新视角探索了以UNC5D为代表的依赖性受体表达抑制的分子机制,为膀胱癌的诊断、预后和治疗提供了新靶点,更为解决凋亡诱导失效的难题提供了可能的方案。
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数据更新时间:2023-05-31
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