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Article Publish Status: FREE
Abstract Title:

Protective effect of tanshinone IIA against radiation-induced ototoxicity in HEI-OC1 cells.

Abstract Source:

Oncol Lett. 2013 Oct ;6(4):901-906. Epub 2013 Jul 24. PMID: 24137434

Abstract Author(s):

Shasha DU, Qiwei Yao, Peixin Tan, Guozhu Xie, Chen Ren, Quanquan Sun, Xiao Zhang, Rong Zheng, Kaijun Yang, Yawei Yuan, Quan Yuan

Article Affiliation:

Shasha DU

Abstract:

Radiotherapy is a highly efficient treatment method for nasopharyngeal carcinoma that is often accompanied by significant ototoxic side-effects. The inner ear hair cells are particularly prone to serious injury following radiotherapy. Tanshinone IIA is a transcription factor inhibitor that is extracted from the traditional herbal medicine,Bunge. The present study investigated the effects of tanshinone IIA treatment on radiation-induced toxicity in the HEI-OC1 hair cell line. Using an MTT assay and flow cytometry, the radiation-induced weakening of the cells was observed to be alleviated when the cells were pre-treated with tanshinone IIA. Radiation exposure promoted p65/nuclear factor (NF)-κB nuclear translocation and activated the p53/p21 pathway, two processes which play a significant role in radiation-induced cell apoptosis. However, pre-treatment of the cells with tanshinone IIA inhibited p65/NF-κB nuclear translocation and p53/p21 pathway activation. These results demonstrate that tanshinone IIA is capable of protecting cochlear cells from radiation-induced injury through the suppression of p65/NF-κB nuclear translocation and the p53/p21 signaling pathway.

Study Type : In Vitro Study

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