Nat Commun:科学家发现结直肠癌发病新机制

2014-06-25 佚名 不详

中国科学家发现结直肠癌发病新机制。解放军军事医学科学院放射与辐射医学研究所张令强课题组通过研究,首次在国际上揭示泛素连接酶Smurf1是促进结直肠癌发生发展,并且导致病人预后差的一个重要因子。谢萍、张明华、何珊等研究人员通过对336例病人的结直肠癌样本分析发现,泛素类蛋白通路的修饰酶体系在结直肠癌中也呈现高表达,它们与Smurf1协同作用,促进了对抑癌蛋白的快速降解,从而解释了Smurf1为何具有

中国科学家发现结直肠癌发病新机制。解放军军事医学科学院放射与辐射医学研究所张令强课题组通过研究,首次在国际上揭示泛素连接酶Smurf1是促进结直肠癌发生发展,并且导致病人预后差的一个重要因子。谢萍、张明华、何珊等研究人员通过对336例病人的结直肠癌样本分析发现,泛素类蛋白通路的修饰酶体系在结直肠癌中也呈现高表达,它们与Smurf1协同作用,促进了对抑癌蛋白的快速降解,从而解释了Smurf1为何具有促癌功能。

世界著名学术期刊《自然—通讯》5月13日晚在线发表了这一新成果。

中国科学院院士、蛋白质组学国家重点实验室主任贺福初告诉记者,这项研究的另一个科学意义在于,此前学术界揭示的这种连接酶均为锌指类型,而Smurf1则属于全新类型的连接酶,两者作用机制不同,并且Smurf1所代表的模式从酵母到哺乳动物都是保守存在的。这为深入理解类泛素化修饰的生物学意义与作用机理开启了新的思路。

结直肠癌是中国常见疾病,居恶性肿瘤发病率第四位,在北京、上海等特大城市已居癌症发病率的第三位。改革开放以来,随着民众生活水平的提高及饮食结构的改变,结肠癌比例亦逐渐增多,且有年轻化的趋势。结直肠癌发病隐匿,早期很难发现,中晚期患者较多,常常危及生命。目前,随着相关研究的深入,靶向药物已成为结直肠癌治疗的新选择。

据张令强研究员介绍,此项成果有助于临床对结直肠癌预后的判断。此外,他们正在研发的抑制剂有望用于结直肠癌的临床治疗,研发Smurf1酶活性的小分子抑制物也将可能成为新的抗肿瘤药物。

《自然—通讯》是英国自然出版集团于2010年新发行的一种综合性学术期刊,2012年位列全球同类期刊第三。张令强课题组隶属于贺福初院士领衔的蛋白质组学国家重点实验室研究团队,他们刚刚获得2013年度国家科技进步创新团队奖和北京市科学技术一等奖。

原始出处

Xie P1, Zhang M2, He S2, Lu K3, Chen Y3, Xing G3, Lu Y3, Liu P4, Li Y5, Wang S5, Chai N6, Wu J6, Deng H6, Wang HR7, Cao Y3, Zhao F3, Cui Y3, Wang J3, He F3, Zhang L8.The covalent modifier Nedd8 is critical for the activation of Smurf1 ubiquitin ligase in tumorigenesis.Nat Commun. 2014 May 13

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    2015-03-23 liuli5079
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    2015-02-09 liye789132251
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