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Inhibition of Anaphase‐Promoting Complex by Silence APC/CCdh1 to Enhance Radiosensitivity of Nasopharyngeal Carcinoma Cells

The aim of this study was to investigate the possibility of APC/CCdh1 as a potential therapeutic target in the radiosensitivity of nasopharyngeal carcinoma (NPC) cell CNE‐1, and explain the role of APC subunits after silence of Cdh1 combined with radiotherapy. Transfection with Cdh1 shRNA significantly increased the radiosensitivity of CNE‐1 cells and the radiation enhancement ratio (RER) of sh‐Cdh1 cells was 1.76. Knockdown of Cdh1 in CNE‐1 cells increased irradiation induced apoptosis and G2/M phase cell cycle arrest. The levels of CDC20 and CylinB1 increased and the levels of Ku70 and APC3 decreased after irradiation. APC/CCdh1is involved in regulation of radiosensitivity in human NPC CNE‐1 cells. Our study may provide a promising therapeutic strategy for NPC by targeting Cdh1. J. Cell. Biochem. 118: 3150–3157, 2017. © 2016 Wiley Periodicals, Inc.