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Int. J. Mol. Sci. 2016, 17(12), 2139;

Triptolide Combined with Radiotherapy for the Treatment of Nasopharyngeal Carcinoma via NF-κB-Related Mechanism

Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning 530021, China
Author to whom correspondence should be addressed.
Academic Editor: Ge Zhang
Received: 13 October 2016 / Revised: 12 December 2016 / Accepted: 15 December 2016 / Published: 19 December 2016
(This article belongs to the Special Issue Translational Molecular Medicine & Molecular Drug Discovery)
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Advanced nasopharyngeal carcinoma (NPC) has a poor prognosis because of the lack of an effective treatment. Here we explored the efficiency and the molecular mechanisms of combined treatment with triptolide and ionizing radiation for treating NPC. Human nasopharyngeal carcinoma (CNE) cells were treated with triptolide, ionizing radiation, or triptolide plus ionizing radiation in vitro. Tumor potency was examined in an in vivo CNE cell xenograft mouse model, which was treated as above. Our results demonstrated that triptolide caused a significant reduction in cell growth and colony number, and induced a marked apoptosis that was further enhanced with increasing doses of ionizing radiation. Combination treatment synergistically reduced tumor weight and volume without obvious toxicity. Western blot analysis in vitro and in vivo showed that triptolide induced apoptotic protein Bax expression and inhibited phosph-NF-κB p65, Bcl-2 and VEGF proteins without affecting other NF-κB related protein expression. In conclusion, our findings revealed that triptolide plus ionizing radiation had synergistic anti-tumor and anti-angiogenesis effects in NPC via down-regulating NF-κB p65 phosphorylation. The combination therapy may provide novel mechanism insights into inhibit NPC. View Full-Text
Keywords: triptolide; ionizing radiation; nasopharyngeal carcinoma; NF-κB; phosphorylation triptolide; ionizing radiation; nasopharyngeal carcinoma; NF-κB; phosphorylation

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Zhang, W.; Kang, M.; Zhang, T.; Li, B.; Liao, X.; Wang, R. Triptolide Combined with Radiotherapy for the Treatment of Nasopharyngeal Carcinoma via NF-κB-Related Mechanism. Int. J. Mol. Sci. 2016, 17, 2139.

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