Essential Oil from Siegesbeckia pubescens Induces Apoptosis through the Mitochondrial Pathway in Human HepG2 Cells

• Published in: 华中科技大学学报：医学英德文版 no. 1; pp. 87 - 92
• Main Author: 吕丹 郭凯文 徐婵 黄密 郑思建 麻新华 潘丽红 王强 杨新洲
• Format: Journal Article
• Language: English
• Published: 2017
• ISSN: 1672-0733; 1993-1352

Siegesbeckia pubescens(SP) has been used as a traditional medicine for the treatment of and inflammatory diseases. However, the activities of SP against hepatocellular carcinoma and the related mechanisms remain unclear. The present study aimed to examine the effects of the essential oil of SP(SPEO) on the proliferation of hepatocellular carcinoma cells and the possible mechanisms. The growth inhibition of Hep G2 cells was analyzed by MTT assay. Hoechst 33258 and fluorescence microscopy were utilized to observe the nuclear morphological changes of apoptotic cells. Flow cytometry was used to detect cell apoptosis and cell cycle. The expressions of the target proteins were detected by Western blotting. The results showed that SPEO obviously inhibited the proliferation of Hep G2 cells in a dose-dependent manner. SPEO activated a series of apoptotic proteins in Hep G2 cells, increasing expression levels of Bax, caspase-3 and caspase-9, and decreasing the bcl-2 expression level. SPEO displayed promising anti-hepatocellular carcinoma activities in vitro, partly by inducing apoptosis in Hep G2 cells through activating the mitochondrial pathway.