alpha-Mangostin induces mitochondrial dependent apoptosis in human hepatoma SK-Hep-1 cells through inhibition of p38 MAPK pathway

作者：Hsieh Shu Ching; Huang Min Hsien; Cheng Chun Wen; Hung Jyun Hao; Yang Shun Fa^*; Hsieh Yi Hsien

来源：Apoptosis, 2013, 18(12): 1548-1560.

DOI：10.1007/s10495-013-0888-5

• alpha-Mangostin
• Apoptosis
• Caspase
• Human hepatocellular carcinoma
• Mitochondrial
• p38 MAPK

alpha-Mangostin is a dietary xanthone that has been shown to have anti-cancer and anti-proliferative properties in various types of human cancer cells. This study investigates the molecular mechanism of the apoptosis-inducing effects of alpha-mangostin on human hepatocellular carcinoma (HCC) cells. We observed that alpha-mangostin reduces the viability of HCC cells in a dose- and time-dependent manner. alpha-Mangostin mediated apoptosis of SK-Hep-1 cells is accompanied by nuclear chromatin condensation and cell cycle arrest in the sub-G1 phases as well as phosphatidylserine exposure. Furthermore, alpha-mangostin triggered the mitochondrial caspase apoptotic pathway, as indicated by the loss of mitochondrial membrane potential, the release of cytochrome c from mitochondria, and the regulation of B cell lymphoma 2 family member expression. Moreover, alpha-mangostin inhibited a sustained activation of p38 mitogen-activated protein kinase (MAPK) phosphorylation, and treatment with a p38 MAPK inhibitor enhanced alpha-mangostin-induced caspase activation and apoptosis in SK-Hep-1 cells. In vivo xenograft mice experiments revealed that alpha-mangostin significantly reduced tumor growth and weight in mice inoculated with SK-Hep-1 cells. These findings demonstrate that alpha-mangostin induces mitochondria-mediated apoptosis through inactivation of the p38 MAPK signaling pathway and that alpha-mangostin inhibits the in vivo tumor growth of SK-Hep-1 xenograft mice.

• 出版日期2013-12
• 单位河北医科大学