Validation of Bmi1 as a therapeutic target of hepatocellular carcinoma in mice.

Validation of Bmi1 as a therapeutic target of hepatocellular carcinoma in mice.
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验证 Bmi1 作为小鼠肝细胞癌的治疗靶点

DOI:
10.3390/ijms151120004
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发表时间:
2014-11-03
影响因子:
5.6
通讯作者:
Xu C
Xu C
中科院分区:
生物学2区
文献类型:
--
作者:
Qi S;Li B;Yang T;Liu Y;Cao S;He X;Zhang P;Li L;Xu C

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Bmi1是polycomb蛋白家族的一员,它驱动多种癌症的癌变,并控制多种类型干细胞的自我更新。我们之前的研究表明,Bmi1在肝癌发生过程中以INK4a/ARF位点独立的方式作为致癌基因。然而,Bmi1是否可以作为肝细胞癌治疗的潜在靶点尚未得到充分证实。本研究表明,利用短发夹RNA干扰Bmi1的表达,可以在体外和体内抑制肝癌细胞的致瘤性和肿瘤生长。重要的是,Bmi1敲低可以阻断肿瘤的生长,无论是在初始阶段还是在快速生长阶段。细胞生物学分析表明,Bmi1敲低可诱导细胞周期阻滞和细胞凋亡。我们的研究结果证实Bmi1是肝细胞癌(HCC)的一个合格的治疗靶点,并支持Bmi1靶向化疗药物的治疗。
Bmi1 is a member of the polycomb group family of proteins, and it drives the carcinogenesis of various cancers and governs the self-renewal of multiple types of stem cells. Our previous studies have revealed that Bmi1 acts as an oncogene in hepatic carcinogenesis in an INK4a/ARF locus independent manner. However, whether Bmi1 can be used as a potential target for hepatocellular carcinoma treatment has not been fully confirmed yet. Here, we show that perturbation of Bmi1 expression by using short hairpin RNA can inhibit the tumorigenicity and tumor growth of hepatocellular carcinoma cells both in vitro and in vivo. Importantly, Bmi1 knockdown can block the tumor growth, both in the initiating stages and the fast growing stages. Cellular biology analysis revealed that Bmi1 knockdown induces cell cycle arrest and apoptosis. Our findings verify Bmi1 as a qualified treatment target for hepatocellular carcinoma (HCC) and support Bmi1 targeting treatment with chemotherapeutic agents.
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