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Abstract Title:

Ginsenoside compound K induces apoptosis in nasopharyngeal carcinoma cells via activation of apoptosis-inducing factor.

Abstract Source:

Chin Med. 2014 Apr 2 ;9(1):11. Epub 2014 Apr 2. PMID: 24690317

Abstract Author(s):

Carmen Ka-Man Law, Hoi-Hin Kwok, Po-Ying Poon, Chi-Chiu Lau, Zhi-Hong Jiang, William Chi-Shing Tai, Wendy Wen-Luan Hsiao, Nai-Ki Mak, Patrick Ying-Kit Yue, Ricky Ngok-Shun Wong

Article Affiliation:

Carmen Ka-Man Law

Abstract:

BACKGROUND: Nasopharyngeal carcinoma (NPC) has a high incidence rate in Southern China. Although there are conventional therapies, the side effects and toxicities are not always tolerable for patients. Recently, the tumoricidal effect of ginsenosides on different cancer cells has been studied. This study aims to investigate the anti-cancer effect of ginsenosides on NPC cells and their underlying mechanism.

METHODS: The cytotoxicity of ginsenosides on NPC cell line HK-1 was measured by MTT assay. Apoptosis was detected by propidium iodide staining followed by flow cytometry. A xenograft tumor model was established by injecting nude mice with HK-1 cells. The activation of caspases and apoptosis-inducing factor (AIF) were evaluated by Western blot analysis. Nuclear translocation of AIF was also studied by immunofluorescence staining. Mitochondrial membrane potential was measured by JC-1 dye using flow cytometry.

RESULTS: Four ginsenosides, 20 (S)-Rh2, compound K (CK), panaxadiol (PD) and protopanaxadiol (PPD), induced apoptotic cell death in HK-1 cells in a concentration-dependent manner. CK inhibited HK-1 xenograft tumor growth most extensively and depleted mitochondrial membrane potential depolarization and induced translocation of AIF from cytoplasm to nucleus in HK-1 cells. In addition, depletion of AIF by siRNA abolished CK-induced HK-1 cell death.

CONCLUSION: Ginsenoside CK-induced apoptosis of HK-1 cells was mediated by the mitochondrial pathway and could significantly inhibit tumor growth in vivo.

Study Type : In Vitro Study

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