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Oncol Rep. 2013 Jun;29(6):2101-8. doi: 10.3892/or.2013.2375. Epub 2013 Apr 3.

Ent-11α-hydroxy-15-oxo-kaur-16-en-19-oic-acid induces apoptosis and cell cycle arrest in CNE-2Z nasopharyngeal carcinoma cells.

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1
Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical College, and Department of General Surgery, 422 Hospital of PLA, Zhanjiang, Guangdong 524023, PR China.

Abstract

Ent-11α-hydroxy-15-oxo-kaur-16-en-19-oic-acid (5F), a compound isolated from Pteris semipinnata L. (PsL), inhibits cell proliferation and induces cell apoptosis in several cancer lines. We found that 5F induced apoptosis and G2 phase cell cycle arrest in the CNE-2Z nasopharyngeal carcinoma (NPC) cells, accompanied by a decrease of NF-κB expression. 5F suppressed the viability of CNE-2Z cells in a time- and dose-dependent manner. 5F induced G2/M phase cell cycle arrest, but did not induce p21. Further analysis revealed that CNE-2Z cells harbored two p53 mutations. 5F treatment resulted in mitochondrial apoptosis, associated with increased Bax/Bcl-2 ratio, upregulation of cytochrome c in the cytosol, decreased NF-κB-p65 and increased IκB. Of note, 5F significantly sensitized CNE-2Z cells to cisplatin. 5F did not increase ROS, but reduced ROS production alone or in combination with cisplatin. Our data suggest that 5F is a potential anti-NPC drug for the development of single agent therapy and therapy in combination with cisplatin.

PMID:
23563985
PMCID:
PMC3694560
DOI:
10.3892/or.2013.2375
[Indexed for MEDLINE]
Free PMC Article
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