The enhancement of tumor radioresponse by combined treatment with cepharanthine is accompanied by the inhibition of DNA damage repair and the induction of apoptosis in oral squamous cell carcinoma.

@article{Harada2012TheEO,
  title={The enhancement of tumor radioresponse by combined treatment with cepharanthine is accompanied by the inhibition of DNA damage repair and the induction of apoptosis in oral squamous cell carcinoma.},
  author={Toyoko Harada and Koji Harada and Yoshiya Ueyama},
  journal={International journal of oncology},
  year={2012},
  volume={41 2},
  pages={
          565-72
        }
}
In the present study, we investigated whether treatment with cepharanthine, a biscoclaurine alkaloid extracted from Stephania cepharantha improves the response to radiotherapy in the oral squamous cell carcinoma (OSCC) cell lines, HSC2, HSC3 and HSC4. We examined the potential mechanisms that may contribute to the enhanced radiation response induced by cepharanthine. Growth inhibition was observed in vitro with radiation or… 
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Results indicate that cepharanthine may inhibit the growth of human oral SCC cells by down-regulating cyclin E to induce G1 arrest through a pathway of p27Kip1 induction.
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The findings demonstrate that the combination of cepharanthine and S-1 is effective against OSCC and has the potential of being a new therapeutic tool for future treatment of these tumors.
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