Telekin Suppresses Human Hepatocellular Carcinoma Cells in Vitro by Inducing G2/M Phase Arrest Via the P38 MAPK Signaling Pathway

Overview

Journal Acta Pharmacol Sin

Specialty Pharmacology

Date 2014 Sep 2

PMID 25176399

Citations 9

Authors

Lin Li

Bei-Bei Zheng

Li-Sha Ma

Xiao Sun

Juan-Juan Chang

Wei-Dong Xie

Xia Li

Affiliations

Soon will be listed here.

Abstract

Aim: Telekin, isolated from the Chinese herb Carpesium divaricatum, has shown anti-proliferation effects against various cancer cells, including hepatocellular carcinoma cells. In this study, we investigated the anti-proliferation mechanisms of telekin in human hepatocellular carcinoma HepG2 cells in vitro.

Methods: HepG2 cells were treated with telekin. Cell viability was evaluated using MTT assay. Flow cytometry was used to measure cell cycle profiles, ROS level and apoptosis. The protein expression levels were analyzed with Western blotting.

Results: Telekin (3.75-30 μmol/L) dose-dependently inhibited the viability of HepG2 cells and induced l apoptosis. Furthermore, the treatment induced cell cycle arrest at G2/M phase, accompanied by significantly increased the phosphorylation of Cdc25A and Cdc2, and decreased Cyclin B1 level. Moreover, the treatment significantly stimulated ROS production, and increased the phosphorylation of p38 and MAPKAPK-2 in the cells. Pretreatment with the antioxidant NAC (2.5, 5, and 10 mmol/L), or the p38 MAPK inhibitor SB203580 (2.5 and 5 μmol/L) dose-dependently attenuated these telekin-induced effects in the cells.

Conclusion: Telekin suppresses hepatocellular carcinoma cells in vitro by inducing G2/M phase arrest via activating the p38 MAPK pathway.

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