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中华乳腺病杂志(电子版) ›› 2008, Vol. 02 ›› Issue (04) : 429 -435. doi: 10.3877/cma.j.issn.1674-0807.2008.04.007

实验研究

线粒体DNA缺失对人乳腺癌MDA-MB-231细胞药物敏感性的影响
孙玉兰1, 谷峰1, 张祖平1, 付丽1,   
  1. 1.300060 天津,天津医科大学附属肿瘤医院乳腺病理研究室 乳腺癌防治教育部重点实验室
  • 收稿日期:2008-05-12 出版日期:2008-08-01
  • 通信作者: 付丽
  • 基金资助:
    国家自然科学基金(30470667)

Effect of mitochondrial DNA deletion on the sensitivity of MDA-MB-231 cells to chemotherapeutic drugs

Yu-lan SUN1, Feng GU1, Zu-ping ZHANG1, Li Fu,1   

  1. 1.Department of Breast Pathological Research,Cancer Institute and Hospital,Tianjin Medical University,Tianjin 300060,China
  • Received:2008-05-12 Published:2008-08-01
  • Corresponding author: Li Fu
引用本文:

孙玉兰, 谷峰, 张祖平, 付丽. 线粒体DNA缺失对人乳腺癌MDA-MB-231细胞药物敏感性的影响[J/OL]. 中华乳腺病杂志(电子版), 2008, 02(04): 429-435.

Yu-lan SUN, Feng GU, Zu-ping ZHANG, Li Fu. Effect of mitochondrial DNA deletion on the sensitivity of MDA-MB-231 cells to chemotherapeutic drugs[J/OL]. Chinese Journal of Breast Disease(Electronic Edition), 2008, 02(04): 429-435.

目的

探讨线粒体DNA缺失对人乳腺癌细胞药物敏感性的影响。

方法

采用溴化乙锭(EB)处理获得人乳腺癌细胞MDA-MB-231的线粒体DNA缺失(rho0 MDA-MB-231)细胞,电镜下观察细胞形态改变,胶原凝胶包埋三维立体培养法(CDDST)对比分析细胞的药物敏感性,免疫组织化学方法检测P-糖蛋白(P-gp)、乳腺癌耐药蛋白(BCRP)的表达。

结果

与MDA-MB-231细胞比较,rhoo MDA-MB-231细胞线粒体数量增多,嵴消失呈空泡样改变,对化疗药物相对抵抗,P-gp、BCRP的表达明显增加。

结论

线粒体的损伤可能参与了乳腺癌细胞耐药表型的形成。

Objective

To explore the relationship between mitochondrial DNA deletion and drug resistance in human breast cancer cells.

Methods

The rho0-derivative of MDA-MB-231 was generated by treating the cultured cells with ethidium bromide.The morphologies were confirmed by transmission electron microscope(TEM).The sensitivities to chemotherapy were determined by Collagen Gel Droplet Embedded Culture-Drug Sensitivity Test(CD-DST).P-glycoprotein(P-gp)and breast cancer resistance protein(BCRP) expression were detected by immunohistochemistry.All the differences were comparatively analyzed between MDA-MB-231 and rho0 MDA-MB-231 cells.

Results

Compared with MDA-MB-231 cells,rho0 MDAMB-231 cells showed different characters,including more mitochondria and cristae vacuolation,less drug sensitivity,and markedly higher expression of P-gp and BCRP.

Conclusions

Mitochondrial DNA deletion may play a role in the formation of drug resistance phenotype of human breast cancer.

表1 药物处理浓度表
图1 MDA-MB-231细胞(电镜×10 000)
图2 rho0MDA-MB-231细胞(电镜×10 000)
图3 药物处理后细胞的相对生存率 PTX1:PTX 1μg/ml;PTX10:PTX 10μg/ml;THP1:THP 1μg/ml;THP10:THP 10μg/ml;GEM0.03:GEM 0.03μg/ml;GEM0.3:GEM 0.3μg/ml;DDP0.2:DDP 0.2μg/ml;DDP2:DDP2μg/ml;5-FU1:5-FU 1μg/ml;5-FU10:5-FU 10μg/ml
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