Multidrug resistance in breast cancer cells during epithelial-mesenchymal transition is modulated by breast cancer resistant protein
- VernacularTitle:乳腺癌上皮-间质转化后引发BCRP介导的多药耐药的研究
- Author:
Che WEI-JUAN
1
;
Wang HUI
;
Tang YONG
;
Liu CHUAN-LIANG
;
Li HONG-LI
;
Li WEN-TONG
Author Information
1. 潍坊医学院
- Keywords:
Breast cancer;
multidrug resistance;
EMT
- From:Chinese Journal of Cancer
2010;29(2):159-165
- CountryChina
- Language:Chinese
-
Abstract:
Background and Objective: Epithelial-mesenchymal transition (EMT)not only initiates invasion and metastasis of tumors, but also induces multidrug resistance in tumor cells.Our experiment analyzed the dependability between breast cancer resistant protein(BCRP)and EMT in breast cancer to explore the effect of EMT on BCRP-mediated multidrug resistance.Methods:The expressions of BCRP and transcription inhibitor Snail(Snail)in breast cancer were detected by immunohistochemistry.The eukaryotic expression vector pCDNA3.1-Snail was constructed and then transfected into human breast cancer cell line MCF-7. Snail, epithelial marker gene E-cadherin,interstitial marker gene Vimentin, multidrug resistance protein BCRP, and relative drug resistance were measured by immunofluorescence,Western blot,real-time polymerase chain reaction(PCR), and MTT assay. Results:Immunohistochemistry showed that Snail Was highly correlated with BCRP in breast cancer.Immunofluorescence,Western blot,and real-time PCR revealed that compared with parent cell MCF-7, after transfected with Snail,the expression of E-cadherin in MCF-7 decreased,but Snail,Vimentin,and BCRP increased.MTT displayed that the relative drug resistarice increased to 9.93.onclusion: After transfected with eukaryotic expression vector pCDNA3.1-Snail,breast cancer cells MCF-7 showed EMT with BCRP-mediated multidrug resistance.
