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Increased bcl-2 expression is associated with primary resistance to chemotherapy in human epithelial ovarian cancer
Faculty
Medicine
Year:
1999
Type of Publication:
Article
Pages:
333-338
Authors:
KHALIFA, A, Ali, HS, Kassim, SK, Sallam, MM, Fayed, ST, Seada, LS, abd-Elkawy, E, Abu Seada, M
DOI:
10.1016/S0009-9120(99)00026-0
Journal:
CLINICAL BIOCHEMISTRY PERGAMON-ELSEVIER SCIENCE LTD
Volume:
32
Research Area:
Medical Laboratory Technology
ISSN
ISI:000082175500004
Keywords :
bcl-2, p53, flowcytometry, ovarian neoplasms, apoptosis, resistance to chemotherapy
Abstract:
Objective: bcl-2, an anti-apoptotic factor, has a role in the pathogenesis of ovarian cancer as well as in resistance to chemotherapy. Design and Methods: 20 benign, and 26 malignant epithelial ovarian tissues were analyzed for bcl-2 protein and mutant p53 by enzyme-immunoassay (EIA). Flowcytometric analysis was also per formed. Patients of malignant group were followed up to monitor overall survival and primary resistance to chemotherapy. Results: bcl-2 was significantly higher in malignant group than benign group (p < 0.001). A cutoff value was determined for bcl-2 (63.8 kU/g protein). At this cutoff, sensitivity is 80.7\%, and specificity is 85\%. Using chi square analysis, a significant correlation was found between bcl-2 and FIGO stage (p = 0.01), overall survival (p = 0.01), as well as primary resistance to chemotherapy (p = 0.03). By correlation coefficient analysis the relation between bcl-2 and synthetic phase fraction was highly significant (p = 0.002). Bcl-2, p53, and FIGO stage were significantly correlated to poor survival (p = 0.01) in univariate analysis. However, in multivariate analysis, only FIGO stage, and p53 were independent risk factors. Conclusion: EIA could be a useful tool for investigating the prognostic value of bcl-2, and its possible prediction of platinum resistance in epithelial ovarian cancer. This might help in selecting patients for future anti-bcl-2 therapy. Copyright (C) 1999 The Canadian Society of Clinical Chemists.
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