Abstract
Liver metastasis is a major cause of mortality from colon cancer. To investigate the role of cyclin-dependent kinase 8 (CDK8) in the progression of colon cancer hepatic metastasis. In this present study, human colon cancer HCT116 or HCT116-LUC-GFP cells were transfected with Lentiviral vector-mediated knockdown of CDK-8. After transfection, metastasis and invasion potential of colon cancer cell was investigated by wound healing and transwell invasion assays, respectively. A mice model of colon cancer liver metastases was established and observed with bioluminescence imaging. The protein expression of CDK-8, β-catenin, E2F1, MMP-7 and E-cadherin in liver tissues were detected by Western Blot. Our results revealed that lentiviral vector-mediated knockdown of CDK-8 inhibited metastasis and invasion of colon cancer cells in vitro and in vivo, respectively. Protein expression of CDK-8, β-catenin, MMP-7 and E-cadherin were inhibited, but protein expression of E2F1 was enhanced. In sum, our data provided compelling evidence that CDK-8 played a significant role in colon cancer hepatic metastasis by regulating the Wnt/β-catenin signal pathway and might sever as a potential therapeutic target for colon cancer patients.
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