Abstract
The purposes of this study were to analyze MDR1 expression in ovarian tumors prior to chemotherapy, to correlate the expression with p16, IGFs, ERalpha, and BRCA1, and to examine the association of MDR1 expression with ovarian cancer prognosis. A primary ovarian cancer cohort of 206 patients after surgery was followed up. MDR1, IGFs, ERalpha, p16, and BRCA1 expressions were analyzed in ovarian tumor samples using quantitative real-time PCR. MDR1 was detected in 177 of 206 specimens. MDR1 expression was positively correlated with IGFBP3, ERalpha, p16, and BRCA1, but not correlated with IGF-II, age, and other clinicopathological parameters. MDR1 expression significantly elevated the risk for disease progression (p = 0.02), and this association remained statistically significant after controlling for patient age and clinicopathological parameters or other correlated genes. No association was found between MDR1 expression and overall survival. MDR1 expression may be an independent marker for ovarian cancer progression and combination of different agents targeting different molecules may improve the outcome of ovarian cancer treatment and prevent drug resistance.
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