Chk2蛋白激酶生物学功能研究进展

摘要

Checkpoint kinase 2(Chk2)是一种多功能蛋白激酶，不仅在DNA损伤诱导的细胞周期阻滞、DNA修复和细胞凋亡过程中扮演着重要角色，而且最新研究发现，其在有丝分裂过程中对纺锤体的组装和染色体稳定性的维持也是必须的。越来越多的证据显示，Chk2和人类肿瘤存在着密切关系，其被视为肿瘤治疗新的分子靶标，在抑制人类肿瘤发生发展中起着关键作用。本文就Chk2蛋白激酶的主要生物学功能作一综述。%Checkpoint kinase 2 (Chk2) isa multifunctional enzyme whose functions are central to the induction of cel cycle arrest,DNA repair and apoptosis by DNA damage.In addition,most recent work has revealed another function of Chk2,independent of DNA damage,that is required for the proper mitotic spindle assembly and for the maintenance of chromosomal stability.The relationship of Chk2 to human cancer studies are developing rapidlywith increasing evidence that Chk2 plays a vital role in tumor suppression and wil be viewed as a new anti-cancer therapy molecular target.The research progression of biological function of Chk2 protein kinase is reviewed in this article.