Cancer Cell:肿瘤细胞核信号陷阱分子RBJ引发肿瘤生长

2014-05-14 肖鑫、刘璐 医学论坛网

今天出版的国际顶级学术《癌细胞》杂志以封面论文形式,发表了中国工程院院士、第二军医大学医学免疫学国家重点实验室主任曹雪涛研究团队有关肿瘤发生发展分子机制的研究论文,报道了该团队发现一种能够通过在细胞核内聚集、放大促癌信号转导的新机制,而促进肿瘤发生与异常生长的新型小G蛋白分子RBJ,提出了肿瘤异常生长的“细胞核信号陷阱”学术观点。 在国家科技部和国家基金委等项目支持下,该工作

今天出版的国际顶级学术《癌细胞》杂志以封面论文形式,发表了中国工程院院士、第二军医大学医学免疫学国家重点实验室主任曹雪涛研究团队有关肿瘤发生发展分子机制的研究论文,报道了该团队发现一种能够通过在细胞核内聚集、放大促癌信号转导的新机制,而促进肿瘤发生与异常生长的新型小G蛋白分子RBJ,提出了肿瘤异常生长的“细胞核信号陷阱”学术观点。

在国家科技部和国家基金委等项目支持下,该工作由曹雪涛院士与第二军医大学医学免疫学国家重点实验室陈涛涌副教授、中国医学科学院医学分子生物学国家重点实验室杨明金博士、俞宙博士等,联合浙江大学医学院免疫学研究所、上海交通大学附属新华医院、第二军医大学长海医院等单位,基础与临床协同攻关,历时13年完成。

肿瘤发生发展机制研究,是长期以来生物医学界备受关注的重大科学问题,事关众多癌症患者治疗新技术、新药物的研发与应用。目前科学家对于肿瘤细胞恶性增殖的信号转导分子机制,进行了大量研究。针对肿瘤细胞信号通路设计出的数种靶向药物,已经应用于治疗胃肠道肿瘤、乳腺癌等。如何提高肿瘤靶向药物治疗的敏感性,以及如何克服耐药性,已成为目前转化医学领域密切关注的重要科学问题。

曹雪涛课题组在1998年从人树突状细胞基因文库中,通过随机测序,自主发现了一个当时功能未知的分子RabJ(后来命名为RBJ)。通过研究发现,RBJ高表达于多种肿瘤细胞中,并能够促进细胞恶性转化,高表达RBJ肿瘤患者的生存期显著缩短。RBJ在肿瘤细胞核内可以直接结合信号分子MEK和ERK,将其锚着于细胞核,使其“陷”入细胞核而不能出核,从而造成促癌信号分子在细胞核内异常聚集,导致下游细胞生长基因异常表达和肿瘤恶性生长。降低RBJ表达可以显著抑制肿瘤生长,表明我自主发现了一个有应用价值的潜在肿瘤靶标。

专家认为,该工作提出的“细胞核陷阱”学术观点,为研究肿瘤细胞异常生长机制提出了新思路,提示“攻破细胞核陷阱”以阻断优势性促癌信号转导途径是抗癌药物设计的方向之一。

原始出处:

Chen T, Yang M, Yu Z, Tang S, Wang C, Zhu X, Guo J, Li N, Zhang W, Hou J, Liu H, Han C, Liu Q, Gu Y, Qian C, Wan T, Cui L, Zhu M, Zheng W, Cao X.Small GTPase RBJ Mediates Nuclear Entrapment of MEK1/MEK2 in Tumor Progression.Cancer Cell. 2014 Apr 15. pii: S1535-6108(14)00118-4 

Hou J, Zhou Y, Zheng Y, Fan J, Zhou W, Ng IO, Sun H, Qin L, Qiu S, Lee JM, Lo CM, Man K, Yang Y, Yang Y, Yang Y, Zhang Q, Zhu X, Li N, Wang Z, Ding G, Zhuang SM, Zheng L, Luo X, Xie Y, Liang A, Wang Z, Zhang M, Xia Q, Liang T, Yu Y, Cao X.Hepatic RIG-I predicts survival and interferon-α therapeutic response in hepatocellular carcinoma.Cancer Cell. 2014 Jan 13;25(1):49-63.

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    2015-04-18 维他命
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    2014-05-16 ying_wu

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