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Prognostic significance of MDR-1 P-glycoprotein expression in breast cancer
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This work was supported by the Science Development Foundation of the Nanjing Medical University(2006NMUZ023).The research in Dr.W.Zhang's laboratary was supported by funding fron the National Research Council of Canada and a Canadian Research Program spon

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    Objective: To investigate the expression of MDR-1 P-glycoprotein(MDR-1 Pgp) in breast cancer and analyze its correlation to the biological behavior and prognosis of the disease. Methods:The expression of MDR-1 Pgp was examined in 75 cases of breast cancer patients by using three different monoclonal antibodies(JSB1, C219 and C494) with S-P immunohistochemisty. These patients were followed up for 5 years, and the correlation between MDR-1 Pgp expression, survival rate and lymph metastasis was analyzed. Results:Positive detection of MDR-1 Pgp by JSB1, C219 and C494 in 75 cases of breast cancer was 86.7%, 48% and 85.3%, respectively. MDR-1 Pgp expression was not related to ages of patients (P > 0.05). JSB1-detected expression of MDR-1 Pgp was related to lymph node metastasis(P < 0.05); while C219 and C494 were not(P > 0.05). The patients with MDR-1 Pgp expression positively detected by either two of the three antibodies, had five-year survival rate that was significantly higher than those positively detected by all the three antibodies(P < 0.05). Conclusion:Three antibodies should be used simultaneously to detect MDR-1 Pgp expression in breast cancer. Positive MDR-1 Pgp expression in breast cancer detected by all the three antibodies may represent a poor prognosis; while positive MDR-1 Pgp detection by JSB1 and C494 is associated with lymph metastasis.

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Huilin Zhang, Wandong Zhang, Fengshan Li.[J].南京医科大学学报(自然科学版),2008,28(3):148-152

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  • 收稿日期:2007-08-30
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