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- W2360438468 abstract "Background and purpose:Multidrug resistance(MDR)is the main obstacle of chemotherapy in the treatment of cancer,and it has been reported that the muted p53 gene is related to MDR.In this study,we explored whether adenovirus mediated p53 gene(Ad-p53)could reverse MDR of human breast cancer and its impacts on the expressions of P-gp,TOPOⅡ and GST-π.Methods:In this study,adriamycin-resistant human breast carcinoma cells(MCF-7/Adr)and its parental cells(MCF-7)were used to determine the effect of Ad-p53.Cck-8 assay was adopted to evaluate the cytotoxicity of adriamycin.Western blot were performed to observe the expression of P-glycoprotein(P-gp),TopoismeraseⅡ(TOPOⅡ)and GST-π.Results:After transfection with 50 MOI Ad-p53,the 50% inhibitory concentration(IC50)of adriamycin to MCF-7/Adr cells was decreased from(4.54±0.91)μg/ml to(0.26±0.11)μg/ml,and the chemosensitivity increased 18.1 times(P0.001).Western blot analysis showed that the expressions of P-gp and GST-π were down-regulated,and there was no significant change of TOPOⅡexpression.Conclusions:Ad-p53 could reverse multidrug resistance of MCF-7/Adr cells through the down-regulation of P-gp and GST-π expressions." @default.
- W2360438468 created "2016-06-24" @default.
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- W2360438468 date "2007-01-01" @default.
- W2360438468 modified "2023-09-28" @default.
- W2360438468 title "The effects of Ad-p53 on the reversal of multidrug resistance in human breast cancer cell line and its impacts on the expressions of P-gp,TOPOII and GST-π" @default.
- W2360438468 hasPublicationYear "2007" @default.
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