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• 基础研究 •    下一篇

taurolidine对小鼠黑色素瘤细胞辐射敏感性的作用及机制

孙宝胜1,2,刘士新1,王铁君3,黄国民4,龚守良2,刘林林3   

  1. (1.吉林省肿瘤医院放疗二科,吉林 长春 130012;2.吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春 130021; 3.吉林大学第二医院放疗科,吉林 长春 130021;4.吉林大学第二医院肿瘤外科,吉林 长春 1
  • 收稿日期:2008-04-25 修回日期:1900-01-01 出版日期:2008-11-28 发布日期:2008-11-28
  • 通讯作者: 刘林林

Effects of taurolidine on radiosensitivity of murine melanoma cells and its mechanism

SUN Bao-sheng1,2,LIU Shi-xin1,WANG Tie-jun3,HUANG Guo-min4,GONG Shou-liang2,LIU Lin-lin3   

  1. (1.Department of Radiotherapy,Tumor Hospital of Jilin Province,Changchun 130012,China; 2. MH Radiobiology Research Unit,School of Public Health,Jilin University,Changchun 130021,China;3.Department of Radiotherapy,Second Hospital,Jilin University,Changchun 130021,China;4. Department of Oncology Surgery,Second Hospital,Jilin University,Changchun 130021,China)
  • Received:2008-04-25 Revised:1900-01-01 Online:2008-11-28 Published:2008-11-28
  • Contact: LIU Lin-lin

摘要: 目的:研究taurolidine通过增强Bax和Bad蛋白表达,降低Bcl-2蛋白表达,提高小鼠黑色素瘤B16-F10细胞的辐射敏感性的作用及机制。方法:流式细胞仪检测0、10、25、50、100和150 μmol•L-1 taurolidine诱导B16-F10细胞凋亡的百分比;细胞 克隆实验检测放射增敏性;Western blotting分析检测蛋白的表达。结果:50 μmol•L-1 taurolidine作用于B16-F10细胞48 h,可诱导5%的细胞凋亡,随作用时间的延长及taurolidine浓度的增加,细胞凋亡的百分率增加(P<0.05),呈显著的时效和量效关系;细胞克隆存活实验显示,当25 μmol•L-1 taurolidine与2 Gy X射线照射联合作用B16-F10细胞时,与单纯给药组和单纯照射组比较,给药联合放疗组的细胞存活率显著降低(P<0.05),并随着药物浓度及照射剂量的增加细胞存活率进一步下降。随着taurolidine的浓度逐渐提高,小鼠黑色素瘤细胞放射增敏比(SER D0和SER Dq)增高,50 μmol•L-1 taurolidine组与10 μmol•L-1组比较差异有显著性(P<0.05);同时促凋亡蛋白Bax和Bad的表达增强,抗凋亡蛋白Bcl-2的表达下降。结论:taurolidine联合X射线照射通过调节Bcl-2家族蛋白协同诱导小鼠黑色素瘤细胞凋亡,从而提高了放射敏感性。

关键词: B16-F10细胞, 放射敏感性, 细胞凋亡, Bcl-2蛋白

Abstract: To observe the effects of taurolidine on radiosensitivity of B16-F10 cells of murine melanoma via the enhancement of Bax and Bad proteins and induction of Bcl-2 protein. Methods The apoptosis of B16-F10 cells was assessed after treated with 0,10,25,50,100 and 150 μmol•L-1 taurolidine,clone survival assay was used to detect the radiosensitivity of B16-F10 cells,and protein expressions were determined by Western blotting.Results The apoptosis of 5% cells was induced in a dose-and time-dependent manner after B16-F10 cells were treated with 50 μmol•L-1 taurolidine.The survival rate decreased after treated with taurolidine in combination with 2 Gy X-irradiation with the increase of taurolidine concentration and doses of irradiation(P<0.05),and the ratio of radiosensitivity (SER D0 and SER Dq) also increased with the increase of its concentration,there was significant difference between 50 μmol•L-1 taurolidine group and 10 μmol•L-1 taurolidine group(P<0.05); meantime, the level of proapototic protein Bax and Bad increased and the level of antiapoptotic protein Bcl-2 reduced. Conclusion Taurolidine in combination with irradiation can enhance the radiaosensitivity by the mediation of Bcl-2 family protein.

Key words: taurolidine, B16-F10 cells, apoptosis, Bcl-2 protein

中图分类号: 

  • Q691