Abstract
Cisplatin (DDP) has been successfully used in the treatment of gastric cancer; however, resistance of gastric tumors to cisplatin has also resulted in frequent treatment failure. To investigate the effect of sorafenib in reversing the resistance of human gastric cancer cell line SGC7901/DDP to treatment by cisplatin, and to examine possible underlying mechanisms. A SGC7901/DDP cell line was treated with different concentrations of sorafenib, with and without cisplatin. The reversing ability of sorafenib on cisplatin treatment was examined using MTT, FACS, and xenograft models. Western blotting and immunofluorescence were used to determine expressions of MDR1, p-Akt, and p-ERK. Sorafenib inhibited proliferation of human gastric cancer cell line SGC7901/DDP, both when used alone and in combination with cisplatin. Expression levels of MDR1, p-Akt, and p-ERK were significantly decreased after sorafenib treatment. Sorafenib may reverse resistance of human gastric cancer cell line SGC7901/DDP to cisplatin through down-regulating MDR1 expression.
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Acknowledgments
This study was supported by the Grants from Medicine Science Research of Guangdong Province (Nos. A2009036, A2014034) and Science and Technology Projects of Guangdong Province (No. 2012B031800163) and Clinical Medicine Scientific Research Foundation of Wu Jie-ping (No. 320.6700.09043).
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Huang, Ys., Xue, Z. & Zhang, H. Sorafenib reverses resistance of gastric cancer to treatment by cisplatin through down-regulating MDR1 expression. Med Oncol 32, 24 (2015). https://doi.org/10.1007/s12032-014-0470-1
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DOI: https://doi.org/10.1007/s12032-014-0470-1