紫杉醇联合顺铂对人乳腺癌细胞株MCF-7增殖抑制作用及其机制
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(30840093)


The proliferation,inhibition and mechanisms of paclitaxel combined with cisplatin in human breast cancer cell line MCF-7
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的:研究紫杉醇联合顺铂对人乳腺癌细胞MCF-7增殖抑制作用,探讨药物作用过程中与MAPK通路-Bcl-2基因家族关系及相关机制-方法:采用CCK-8试剂盒检测不同浓度紫杉醇-顺铂单独或联合作用MCF-7细胞48 h后对细胞增殖的50%抑制浓度(IC50),以及紫杉醇-顺铂分别联合ERK通路阻断剂(U0126)-JNK通路阻断剂(sp600125)对细胞增殖的抑制率;采用流式细胞仪检测紫杉醇-顺铂作用细胞48 h后的细胞周期分布情况;应用Western blot分别检测紫杉醇-顺铂及两药联合作用MCF-7细胞48 h后MAPK通路蛋白及Bcl-2-Bax蛋白表达-结果:紫杉醇(0.025~0.400 μmol/L)-顺铂(1~16 μmol/L)联合作用细胞时呈协同作用(CI < 0.95)-sp600125对MCF-7细胞增殖具有明显的抑制作用,sp600125联合紫杉醇-顺铂的抑制作用强于紫杉醇-顺铂单独作用细胞时的抑制作用-两药联合时处于G2期的细胞较紫杉醇单独作用时减少,较顺铂单独作用增加-紫杉醇-顺铂联合作用细胞48 h后p-ERK-Bcl-2蛋白表达较两药单独作用时降低,p-JNK/SAPK-p-p38蛋白表达较对照组明显增加-结论:紫杉醇联合顺铂作用MCF-7细胞时具有协同作用,两药与JNK通路阻断剂联用时对细胞的抑制作用强于单独用药时-紫杉醇联合顺铂时可以减少细胞在G2/M期的积聚,同时可以激活JNK-p38通路,抑制ERK通路的激活-

    Abstract:

    Objective:To investigate the inhibitory effects of paclitaxel alone or combined with cisplatin against human breast cancer line MCF-7 in vitro,and to explore the related mechanisms with MAPK pathway and Bcl-2 gene family. Methods: MCF-7 cells were treated by paclitaxel with or without cisplatin,and the proliferation and 50% inhibitory concentration (IC50) were calculated by cell counting kit-8 assay. The effects of ERK pathway inhibitor (U0126) and JNK pathway inhibitor (sp600125) on cell proliferation were also observed. Flow cytometry was used to determine cell cycle distribution,and Western blot was used to detect the protein expression level changes of MAPK pathway members,Bcl-2 and Bax when cells were given different treatments. Results: Paclitaxel(0.025~0.400 μmol/L) combined with cisplatin(1~16 μmol/L) showed an obvious synergistic effect(CI < 0.95). Sp600125 could significantly inhibit MCF-7 growth in vitro. Sp600125 combined with paclitaxel or cisplatin had a better antitumor activity than paclitaxel or cisplatin used alone. When treated with paclitaxel and cisplatin together,the cells at G2/M phase were less than paclitaxel group but more than cisplatin group. Combination of paclitaxel and cisplatin was found to decrease p-ERK,Bcl-2 protein levels in contrast with paclitaxel group or cisplatin group and increase p-JNK/p-SAPK,p-p38 protein levels in contrast with control group after 48 hours. Conclusion: Combination of paclitaxel and cisplatin in vitro showed synergistic effect. JNK pathway inhibitor combined with paclitaxel and cisplatin showed more powerful inhibition on MCF-7 cells than the two drug combination. Combination of paclitaxel and cisplatin seems to limit the accumulation of MCF-7 cells in G2/M and activate JNK and p38 signal pathway while inhibit the activation of ERK signal pathway.

    参考文献
    相似文献
    引证文献
引用本文

张 华,唐金海,季明华,吴建中.紫杉醇联合顺铂对人乳腺癌细胞株MCF-7增殖抑制作用及其机制[J].南京医科大学学报(自然科学版),2012,(3):338-342

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2011-10-16
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期:
通知关闭
郑重声明