EGF Reverses Multi-drug Resistance via the p-ERK Pathway in HepG2/ADM and SMMC7721/ADM Hepatocellular Carcinoma Models

Yan, Feng; Bai, Li-Ping; Gao, Hua; Zhu, Chang-Ming; Lin, Li; Kang, Xiang-Peng

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저자정보: Yan, Feng (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Center of Xiamen City) Bai, Li-Ping (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Center of Xiamen City) Gao, Hua (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Center of Xiamen City) Zhu, Chang-Ming (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Center of Xiamen City) Lin, Li (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Center of Xiamen City) Kang, Xiang-Peng (Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen University Digestive Diseases Institute, Digestive Diseases Cent)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제15권 제6호

발행연도: 2014.1

수록면: 2,619 - 2,623 (5page)

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Aim: To investigate signaling pathways for reversal of EGF-mediated multi-drug resistance (MDR) in hepatocellular carcinoma (HCC) models. Materials and Methods: HCC MDR cell strain HepG2/adriamycin (ADM) and SMMC7721/ADM models were established using a method of exposure to medium with ADM between low and high concentration with gradually increasing concentration. Drug sensitivity and reversal of multi-drug resistance by EGF were determined and the cell cycle distribution and apoptosis were analyzed by flow cytometry. Phosphorylation of ERK1, ERK2, ERK5 and expression of Bim were detected by Western blotting. Results: The results showed that HepG2/ADM and SMMC7721/ADM cells were resistant not only to ADM, but also to multiple anticancer drugs. When used alone, EGF had no anti-tumor activity in HepG2/ADM and SMMC7721/ADM cells in vitro, while it increased the cytotoxicity of ADM. EGF induced cell apoptosis and G0/G1 phase cell cycle arrest in HepG2/ADM And SMMC7721/ADM cells, while enhancing activity of p-ERKs and up-regulated expression of BimEL. Conclusions: EGF might enhance the chemosensitivity of HepG2/ADM and SMMC7721/ADM cells via up-regulating p-ERKs and BimEL protein.

#EGF #Hepatocellular carcinoma #multi-drug resistance #ERK #BimEL

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