Hepatocellular carcinoma is a high malignant tumor,and one of the leading cause of treatment failure is malignant proliferation. Compound screening manifested that rotenoid Dalbinol suppressed cell growth in HepG2, HepG2/ADM and SMMC-7721 cells. Further exploration showed that Dalbinol suppressed Wnt signaling by promoting the expression of DACH1,which was a negative modulator of Wnt pathway. However, the direct target of Dalbinol is not clear yet. Basis on information above, we put forward this hypothesis: Dalbinol suppressed cell growth through DACH1/β-catenin axis. Here, we will look for the direct target of Dalbinol by affinity chromatography and mass spectrometry, and explore the relationship between the two. Also, we will confirm the antitumor activity of Dalbinol in vivo by patient-derived tumor tissue xenograft models. In all, this project will reveal the mechanism of how Dalbinol inhibit cell proliferation through DACH1/β-catenin axis in HCC cells, and provide a new candidate compound for HCC therapy.
肝细胞肝癌是恶性程度很高的肿瘤,其恶性增殖是临床治疗失败的原因之一。寻找有效的抑制肿瘤增殖药物,是肝癌治疗的一条重要途径。我们前期的药物筛查发现,天然化合物Dalbinol能有效抑制肝癌细胞HepG2,HepG2/ADM和SMMC-7721生长;进一步研究发现Dalbinol通过上调Wnt通路的负向调节因子DACH1,从而抑制Wnt通路激活。但Dalbinol的直接靶点尚不清楚。我们假设:Dalbinol通过某种机制上调DACH1,进而抑制β-catenin介导的肝癌细胞增殖。本项目拟采用亲和层析和质谱技术,寻找Dalbinol的直接靶点,并探索该靶点与DACH1/β-catenin通路的关系;拟通过人源肝癌组织的异体移植模型,证实Dalbinol的体内抗肿瘤活性。本项目的完成将会阐明Dalbinol抑制肝癌增殖的分子机制,为肝癌的治疗更有效的候选化合物。
肝细胞肝癌是恶性程度很高的肿瘤,其恶性增殖是临床治疗失败的原因之一。寻找有效的抑制肿瘤增殖药物,是肝癌治疗的一条重要途径。为此,我们从干燥的紫穗槐种子分离纯化出一系列化合物,进行抗肿瘤活性筛查,其中,天然化合物Dalbinol对肿瘤细胞具有很好的杀伤作用。CCK-8实验和克隆形成实验显示Dalbinol能有效抑制肝癌细胞HepG2、HepG2/ADM、Huh7和SMMC-7721增殖;在荷瘤小鼠体内,Dalbinol能明显抑制肝癌细胞SMMC-7721移植瘤的生长;流式细胞术和Western blot检测发现,Dalbinol在一定程度上能诱导肝癌细胞HepG2、HepG2/ADM、Huh7和SMMC-7721发生凋亡。高通量mRNA表达谱芯片数据表明,Dalbinol抑制了Wnt信号通路,上调了Wnt通路的负向调节因子DACH1的mRNA水平。进一步的机制研究发现,Dalbinol通过上调DACH1,促进β-catenin泛素化降解,抑制Wnt/β-catenin信号激活,进而肝癌细胞增殖。本项目的完成不仅阐明了天然产物Dalbinol抑制肝癌增殖的分子机制,而且可能为肝癌的临床治疗更有效的候选化合物。
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数据更新时间:2023-05-31
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