Enhanced Chemotherapy Sensitivity of Human Colon Cancer Cells to 5-Fluorouracil by siRNA Recombinant Expression Vector Targeting Survivin Gene

• Published in: Chinese medical sciences journal Vol. 24; no. 2; pp. 97 - 101
• Main Authors: Cai, Ming, Wang, Guo-bin, Tao, Kai-xiong, Cai, Chang-xue
• Format: Journal Article
• Language: English
• Published: China Elsevier B.V 01.06.2009; Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China%Department of Pathogenic Biology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
• Subjects: Antimetabolites, Antineoplastic - therapeutic use; Cell Line, Tumor; Cell Proliferation; chemotherapy; Colonic Neoplasms - drug therapy; Colonic Neoplasms - genetics; Colonic Neoplasms - metabolism; Fluorouracil - therapeutic use; gene therapy; Genetic Vectors - genetics; Genetic Vectors - metabolism; Humans; Inhibitor of Apoptosis Proteins; Microtubule-Associated Proteins - genetics; Microtubule-Associated Proteins - metabolism; RNA interference; RNA, Small Interfering - genetics; RNA, Small Interfering - metabolism; siRNA; survivin; Survivin基因; 敏感性; 氟脲嘧啶; 癌细胞; 结肠癌; 重组表达载体; survivin; gene therapy; RNA interference; chemotherapy
• ISSN: 1001-9294
• DOI: 10.1016/S1001-9294(09)60069-9

Objective To investigate the effects of small interfering RNA （siRNA） recombinant expression vector targeting survivin gene on chemotherapy sensitivity of human colon cancer cells to 5-fluorouracil. Methods siRNA recombinant expression vector targeting survivin gene was constructed and transfected into human colon cancer cell lines LOVO. After 48 hours of transfection, cells were harvested for analysis of survivin mRNA and protein expressions using RT-PCR and Western blot. In addition, after human colon cancer cell lines were treated with Survivin siRNA and/or 5-fluorouracil, MTT assay and flow cytometry were used to analyze cell proliferation and apoptosis. Results Restriction endonuclease analysis confirmed that siRNA recombinant expression vector targeting survivin gene was successfully constructed. Inhibitory ratios of survivin mRNA and protein expressions by Survivin siRNA were 36.33% and 44.65%, respectively. Survivin siRNA combined with 5-fluorouracil significantly increased the cell proliferation inhibitory ratio and apoptosis ratio compared with 5-fluorouracil treatin~ alone （P〈0.05）. Conclusion The siRNA recombinant expression vector targeting survivin gene can inhibit the expression of survivin gene, and enhance chemotherapy sensitivity of human colon cancer cells to 5- fluorouracil.