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The Inhibitory Effect of Buddlejasaponin IV on the Growth of YD-10B Human Oral Squamous Cell Carcinoma Cells

 Ki-Rim Kim  ;  Kwang-Kyun Park  ;  Won-Yoon Chung  ;  Young Sun Hwang 
 JOURNAL OF CANCER PREVENTION, Vol.18(4) : 330-336, 2013 
Journal Title
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Apoptosis ; Buddlejasaponin IV ; Cell cycle arrest ; Oral squamous cell carcinoma
Background: Buddlejasaponin IV (BS-IV), a triterpene saponin isolated from Pleurospermum kamtschaticum HOFFMANN (Umbelliferae), is known to have potent anti-inflammatory activity and cytotoxicity against diverse cancer cell lines. In the present study, we attempted to verify whether BS-IV could inhibit cell growth, and induce cell cycle arrest and apoptosis in highly invasive YD-10B human oral squamous cell carcinoma (OSCC) cells. Methods: YD-10B cells were treated with various concentrations of BS-IV, and the cell viability was evaluated by MTT assay. Flow cytometry was conducted to examine cell phase distribution and DAPI staining was performed to observe apoptotic morphological changes in BS-IV-treated YD-10B cells. Western blot analysis was used to investigate the expression of proteins associated with cell cycle arrest and apoptosis.Results: BS-IV treatment significantly reduced the viability of YD-10B cells and partially arrested cell cycle progression at the G2/M phase. Treatment with BS-IV substantially decreased the levels of cyclin B1 and stimulated the phosphorylation of checkpoint kinase 2 (Chk2). The expression of p21 was increased but the phosphorylation of Akt was inhibited in BS-IV-treated YD-10B cells. Furthermore, BS-IV induced release of cytochrome c from mitochondria by reducing anti-apoptotic Bcl-2 level and increasing pro-apoptotic Bax level. Active caspase-3 level and the cleavage of poly (ADP-ribose) polymerase (PARP) were enhanced by BS-IV treatment. In addition, BS-IV increased the expression of Fas death receptor and its ligand (FasL) in YD-10B cells. Conclusions: The treatment with BS-IV inhibits the growth of YD-10B cells by inducing p21-dependent cell cycle arrest at G2/M phase and apoptosis through both mitochondrial-dependent and death receptor-mediated pathways. Thus, BS-IV is an excellent candidate for a chemopreventive agent to block the progression of human OSCC.
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2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
5. Research Institutes (연구소) > Oral Cancer Research Institute (구강종양연구소) > 1. Journal Papers
Yonsei Authors
Kim, Ki Rim(김기림)
Park, Kwang Kyun(박광균)
Chung, Won Yoon(정원윤) ORCID logo https://orcid.org/0000-0001-8428-9005
Hwang, Young Sun(황영선)
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