Arsenite inhibits the function of CD133+ CD13+ liver cancer stem cells by reducing PML and Oct4 protein expression

被引:24
|
作者
Tang, Huaming [1 ]
Jin, Yukai [2 ]
Jin, Shilong [1 ]
Tan, Zhiming [1 ]
Peng, Zhang [1 ]
Kuang, Yuanli [1 ]
机构
[1] Kai Xian Poeples Hosp Chongqing City, Dept Hepaticbiliary Surg, 8 Ankang Rd,Hanfeng St, Chongqing 405400, Peoples R China
[2] Tsinghua Univ, Zijing Dept, Peking Union Med Coll, Dept Clin Med, 328A 27, Beijing, Peoples R China
关键词
Arsenite; CD133(+); CD13(+); Liver cancer stem cells; PML; Oct4; RAR-ALPHA; POPULATION; STATISTICS; APOPTOSIS; SURVIVAL; GROWTH; FATE;
D O I
10.1007/s13277-016-5195-7
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Cancer stem cells (CSCs) can form new tumors and contribute to post-operative recurrence and metastasis. We showed that CD133(+)CD13(+) hepatocytes isolated from HuH7 cells and primary HCC cells display biochemical and functional characteristics typical of CSCs, suggesting that CD133(+)CD13(+) hepatocytes in primary HCC tumors function as CSCs. We also found that arsenite treatment reduced the viability and stemness of CD133(+)CD13(+) hepatocytes, enhanced the sensitivity of HuH7 cells to pirarubicin, and reduced the tumorigenicity of CD133(+)CD13(+) hepatocytes xenografts in mice. The effects of sodium arsenite treatment in CD133(+)CD13(+) hepatocytes were mediated by the post-transcriptional suppression of PML expression and the inhibition of Oct4, Sox2, and Klf4 expression at the transcriptional level. Incomplete rescue of Oct4 expression in arsenic-treated cells ectopically expressing an siRNA-resistant PML transcript suggested that OCT4 regulation in liver CSCs involves other factors in addition to PML. Our findings provide evidence of a specific role for PML in regulating Oct4 levels in liver CSCs and highlight the clinical importance of arsenic for improving the efficacy of other chemotherapeutic agents and the prevention of post-operative HCC recurrence and metastasis.
引用
收藏
页码:14103 / 14115
页数:13
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