MicroRNA-20a Overexpression Inhibited Proliferation and Metastasis of Pancreatic Carcinoma Cells

被引:56
作者
Yan, Haijiao [1 ]
Wu, Jiangxue [1 ]
Liu, Wensong [3 ]
Zuo, Yufang [1 ]
Chen, Shupeng [1 ]
Zhang, Shineng [4 ]
Zeng, Musheng [1 ]
Huang, Wenlin [1 ,2 ]
机构
[1] Sun Yat Sen Univ, Ctr Canc, State Key Lab Oncol S China, Guangzhou 510060, Guangdong, Peoples R China
[2] Chinese Acad Sci, Inst Microbiol, Beijing 100080, Peoples R China
[3] Nanjing Med Univ, Wuxi Peoples Hosp, Dept Gen Surg, Wuxi 214023, Jiangsu, Peoples R China
[4] Sun Yat Sen Univ, Affiliated Hosp 2, Dept Gastroenterol, Guangzhou 510120, Guangdong, Peoples R China
基金
国家高技术研究发展计划(863计划);
关键词
IN-SITU DETECTION; CANCER-CELLS; BREAST-CANCER; HEPATOCELLULAR-CARCINOMA; CHROMOSOME; 13Q; GROWTH-FACTOR; EXPRESSION; INVASION; STAT3; ACTIVATION;
D O I
10.1089/hum.2010.061
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The aim of this study was to investigate the effect of microRNA-20a on pancreatic carcinoma cell proliferation and invasion and to find a new effective treatment strategy for pancreatic carcinoma. MicroRNA-20a expression was determined in 10 matched normal pancreatic tissues and pancreatic carcinoma by in situ hybridization. Quantitative real-time RT-PCR was used to evaluate the expression of microRNA-20a in two pancreatic carcinoma cell lines (BxPC-3 and Panc-1) and immortal human pancreatic duct epithelial cell line H6C7. Proliferation and invasion capacity were analyzed for the cells with lentivirus-mediated overexpression of microRNA-20a both in vitro and in vivo. In addition, the regulation of signal transducer and activator of transcription proteins 3 (Stat3) by microRNA-20a was determined to elucidate the underlying mechanisms. The pancreatic cancer cell lines (Panc-1 and BxPC-3) stably overexpressing microRNA-20a showed reduced proliferation and invasion capacity in vitro and in vivo, compared with parental cells or cells transfected with a control vector. Furthermore, we found that microRNA-20a negatively regulated Stat3 protein expression in a dose-dependent manner without changing the Stat3mRNA level and decreased the activity of a luciferase reporter construct containing the Stat3 3'-untranslated region. These results show that microRNA-20a regulates Stat3 at the post-transcriptional level, resulting in inhibition of cell proliferation and invasion of pancreatic carcinoma. It may open a new perspective for the development of effective gene therapy for pancreatic carcinoma.
引用
收藏
页码:1723 / 1734
页数:12
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