Survivin inhibition is critical for Bcl-2 inhibitor-induced apoptosis in hepatocellular carcinoma cells.

Survivin inhibition is critical for Bcl-2 inhibitor-induced apoptosis in hepatocellular carcinoma cells.
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Survivin抑制作用对于肝细胞癌细胞中Bcl-2抑制剂诱导的凋亡至关重要。

DOI:
10.1371/journal.pone.0021980
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Liu C
Liu C
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhao X;Ogunwobi OO;Liu C

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本研究旨在研究新型Bcl-2抑制剂ABT-263对肝细胞癌(HCC)的治疗作用,为ABT-263的临床应用提供基础数据。在本研究中,我们发现Bcl-xL和生存素在肝癌细胞系和人肝癌组织中上调。临床使用的ABT-263单次处理对HCC细胞没有凋亡作用,而高剂量的ABT-263对HCC细胞有凋亡作用。有趣的是,ABT-263与生存素抑制剂YM-155的联合处理可以导致HCC细胞的显著凋亡。通过基因沉默抑制Survivin显著增强ABT-263诱导HCC细胞凋亡。我们发现,低剂量ABT-263单次处理导致ERK激活和Survivin上调,这可能参与了HCC细胞对ABT-263的抗性,因为ERK激活的阻断使ABT-263诱导的凋亡敏感。重要的是,ABT-263和YM-155联合治疗对正常人肝细胞没有凋亡作用。综上所述,这些数据表明Bcl-2抑制剂和Survivin抑制剂的联合治疗可能具有很大的肝癌治疗潜力。
Our study aims to study the therapeutic effects of a novel Bcl-2 inhibitor, ABT-263, on hepatocellular carcinoma (HCC) and to provide primary preclinical data for future clinical trial with ABT-263. In this study we showed that Bcl-xL and survivin were up-regulated in HCC cell lines and human liver cancer tissues. Clinic used ABT-263 single treatment had no apoptotic effects on HCC cells whereas higher doses of ABT-263 did. Interestingly, the combination treatment of ABT-263 with survivin inhibitor YM-155 could result in significant apoptosis in HCC cells. Survivin inhibition through gene silencing significantly enhanced ABT-263 to induce apoptosis in HCC cells. We found that low dose of ABT-263 single treatment resulted in ERK activation and survivin up-regulation, which might be involved in the resistance of HCC cells to ABT-263 since blockade of ERK activation sensitized ABT-263-induced apoptosis. Importantly, ABT-263 and YM-155 combination treatment had no apoptotic effects on normal human hepatocytes. Taken together, these data suggest the combination treatment of Bcl-2 inhibitor and survivin inhibition may have a great potential for liver cancer therapy.
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