华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

表皮生长因子受体单抗MAb225对舌癌细胞DNA放射后损伤修复的影响

王明国1 王中和2   

  1. 1.山东大学附属济南市中心医院口腔科, 济南250013;2.上海交通大学附属第九人民医院口腔颌面外科, 上海200011
  • 收稿日期:2011-12-25 修回日期:2011-12-25 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 王明国,Tel:0531-85695171
  • 作者简介:王明国(1972—),男,山东人,副主任医师,博士
  • 基金资助:

    山东省中青年科学家奖励基金资助项目(2006BS03046);山东省十一五卫生科技发展计划基金资助项目(2007-11)

Influence of epidermal growth factor receptor monoclony antibody MAb225 on DNA repair of tongue carcinoma cell after radiation

Wang Mingguo1, Wang Zhonghe2   

  1. 1. Dept. of Stomatology, The Affiliated Jinan Central ospital of Shandong University, Jinan 250013, China; 2. Dept. of Oral and Maxillofacial Surgery, The Ninth People’s ospital, School of Stomatology, Shanghai Jiao Tong University, Shanghai 200011, China
  • Received:2011-12-25 Revised:2011-12-25 Online:2011-12-20 Published:2011-12-20
  • Contact: Wang Mingguo,Tel:0531-85695171

摘要:

目的研究表皮生长因子受体(EGFR)单克隆抗体MAb225对放射所致舌癌细胞DNA损伤修复的影响及其作用机制。方法应用单细胞凝胶电泳的方法检测MAb225对舌鳞癌细胞Tca8113放射后DNA双链断裂所致的尾矩,半定量逆转录多聚酶链反应和Western blot检测MAb225对DNA蛋白激酶Ku70、Ku80表达的影响。结果MAb225作用后的细胞单细胞凝胶电泳的彗星尾矩明显高于未处理细胞(P<0.05),并能显著抑制DNA蛋白激酶Ku70、Ku80的表达。结论MAb225通过抑制DNA蛋白激酶Ku70、Ku80的表达影响了DNA双链断裂的修复能力。

关键词: 放射, 舌癌, DNA, 双链断裂, 修复

Abstract:

Objective The objective of this study is to investigate the effect of epidermal growth factor receptor (EGFR) monoclonal antibody MAb225 on repair of DNA double strand break(DNA-DSB) after radiation in tongue squamous cell carcinoma cell. Methods The single cell gel electrophoresis(SCGE) was performed to estimate the repair of DNA-DSB induced by radiation in human tongue carcinoma cells Tca8113 treated with or without MAb225. Expression of Ku70 and Ku80 were detected by semiquantitative reverse transcription polymerase chain reaction and Western bolt. Results Comet tail moment of MAb225 treated cell was significantly higher than untreated cell(P<0.05). The expression of Ku70 and Ku80 were inhibited by MAb225. Conclusion MAb225 can inhibit repair of DNA-DSB induced by down-regulated expression of Ku70 and Ku80.

Key words: radiation, tongue carcinoma, DNA, double strand break, repair