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Cancer Cell:多梳蛋白4(Cbx4)与肝癌生存期密切相关

2014-03-21 佚名 健康报

上海交通大学医学院细胞分化和凋亡教育部重点实验室陈国强教授领衔的课题组科研人员历时6年,在多梳蛋白4(Cbx4)干预肝癌组织新生血管生成研究方面取得突破,相关研究论文日前发表在国际学术刊物《癌细胞》杂志上。专家认为,Cbx4与肝癌病人的生存期密切相关,有望成为临床上判断肝癌预后的指标;同时发现Cbx4通过泛素蛋白修饰调控肝癌的新生血管生成,为肝癌治疗提供新启示。 既往

上海交通大学医学院细胞分化和凋亡教育部重点实验室陈国强教授领衔的课题组科研人员历时6年,在多梳蛋白4(Cbx4)干预肝癌组织新生血管生成研究方面取得突破,相关研究论文日前发表在国际学术刊物《癌细胞》杂志上。专家认为,Cbx4与肝癌病人的生存期密切相关,有望成为临床上判断肝癌预后的指标;同时发现Cbx4通过泛素蛋白修饰调控肝癌的新生血管生成,为肝癌治疗提供新启示。

既往研究认为,高密度的新生血管生成在肝癌的发生、发展和转移过程中发挥了重要作用,但既往研究中缺少特异性抑制新生血管生成的靶点蛋白。

陈国强课题组科研人员通过检测727位肝癌病人癌组织样本中多梳蛋白4(Cbx4)的表达,发现高表达Cbx4的肝癌病人手术后5年生存期明显低于低表达Cbx4的肝癌病人,科研人员由此提出Cbx4是独立判断肝癌病人预后的重要指标。在此基础上,科研人员又进一步发现,Cbx4的表达水平与血管内皮生长因子(VEGF)的表达及新生血管密度呈高度正相关,即在多种皮下与原位肝癌实验小鼠模型中,Cbx4高表达促进VEGF的产生、新生血管生成和肿瘤的生长与转移;反之,抑制Cbx4表达则明显抑制甚至阻止肝癌细胞在小鼠体内的生长,从而揭示了Cbx4在肝癌发生、发展中的重要作用。

原始出处:

Li J, Xu Y, Long XD, Wang W, Jiao HK, Mei Z, Yin QQ, Ma LN, Zhou AW, Wang LS, Yao M, Xia Q, Chen GQ.Cbx4 governs HIF-1α to potentiate angiogenesis of hepatocellular carcinoma by its SUMO E3 ligase activity.Cancer Cell. 2014 Jan 13;25(1):118-31.

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    2014-12-26 维他命
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