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Xanthorrhizol Induces Apoptosis Through ROS-Mediated MAPK Activation in Human Oral Squamous Cell Carcinoma Cells and Inhibits DMBA-Induced Oral Carcinogenesis in Hamsters.
MedLine Citation:
PMID:  22627996     Owner:  NLM     Status:  Publisher    
Xanthorrhizol, a natural sesquiterpenoid compound isolated from Curcuma xanthorrhiza Roxb, has been known to inhibit the growth of human colon, breast, liver and cervical cancer cells. In this study, xanthorrhizol decreased cell viability, induced apoptosis and decreased the level of full-length PARP in SCC-15 oral squamous cell carcinoma (OSCC) cells. A decrease in cell viability and PARP degradation was not prevented by treatment with the caspase inhibitor Z-VAD-fmk in xanthorrhizol-treated cells. Xanthorrhizol treatment elevated intracellular Ca(2+) and ROS levels in SCC-15 cells. Treatment with a Ca(2+) chelator, EGTA/AM, did not affect xanthorrhizol- induced cytotoxicity, but cell viability was partly recovered by treatment with endogenous antioxidant, GSH, or hydroxy radical trapper, MCI-186. Furthermore, the viability of xanthorrhizol-treated SCC-15 cells was significantly restored by treatment with SB203580 and/or SP600125 but not significantly by PD98059 treatment. Xanthorrhizol-induced activation of p38 MAPK and JNK was blocked by MCI-186. Finally, xanthorrhizol suppressed the number of tumors in buccal pouches and increased the survival rate in hamsters treated with 7,12-dimethylbenz[a]anthracene. In conclusion, xanthorrhizol may induce caspase-independent apoptosis through ROS-mediated p38 MAPK and JNK activation in SCC-15 OSCC cells and prevent chemical-induced oral carcinogenesis. Therefore, xanthorrhizol seems to be a promising chemopreventive agent. Copyright © 2012 John Wiley & Sons, Ltd.
Ju Yeon Kim; Jeong Mi An; Won-Yoon Chung; Kwang-Kyun Park; Jae Kwan Hwang; Du Sik Kim; Su Ryeon Seo; Jeong Taeg Seo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-25
Journal Detail:
Title:  Phytotherapy research : PTR     Volume:  -     ISSN:  1099-1573     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8904486     Medline TA:  Phytother Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 John Wiley & Sons, Ltd.
Department of Oral Biology, Brain Korea 21 Project, Yonsei University College of Dentistry, Seoul, Korea.
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