Abstract | OBJECTIVE: Numerous studies suggest that cyclooxygenase-2 (COX-2) is overexpressed in cancer. Our objective was to investigate the relationship between COX-2 expression in ovarian carcinoma and clinicopathological factors. An emphasis was put on the association with the new pattern of tumorigenesis that divides tumors into type I--less aggressive, and type II--more aggressive one. The prognostic significance of COX-2 expression was evaluated. METHODS:
Ovarian cancer tissues were obtained from 65 patients in FIGO III stage (23 with type I and 42 with type II ovarian cancer). COX-2 expression was evaluated by immunohistochemistry. The statistical analysis was performed in order to assess the connection between COX-2 expression and characteristic factors of ovarian cancer patients as well as the new division for type I and type II ovarian cancer
RESULTS: COX-2 expression was detected in 91% of tissue samples. It was markedly elevated in well differentiated tumors (p = 0.0041). The platinum-resistant tumors had significantly higher expression of COX-2 (p = 0.0337). There was no difference between COX-2 expression in type I and type II ovarian cancer (p = 0.6720). The COX-2 staining was not associated to age, CA125 level, the presence of ascites or any special histological type. An increased expression of COX-2 was an unfavorable prognostic factor for overall survival (p = 0.0369) and progression-free survival (p = 0.0218). Multivariate analysis confirmed that COX-2 overexpression is an independent unfavorable prognostic factor of shorter progression-free survival (p = 0.048). CONCLUSIONS: COX-2 expression is an unfavorable prognostic factor for progression-free survival and overall survival in ovarian cancer There is no relationship between COX-2 expression in ovarian cancer tissue and the examined model of ovarian cancer pathogenesis.
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Authors | Magdalena Magnowska, Mikołaj Zaborowski, Paweł Surowiak, Ewa Nowak-Markwitz, Maciej Zabel, Marek Spaczyński |
Journal | Ginekologia polska
(Ginekol Pol)
Vol. 85
Issue 5
Pg. 335-41
(May 2014)
ISSN: 0017-0011 [Print] Poland |
PMID | 25011213
(Publication Type: Journal Article)
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Chemical References |
- Cyclooxygenase 2
- PTGS2 protein, human
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Topics |
- Cyclooxygenase 2
(genetics)
- Female
- Humans
- Immunohistochemistry
(methods)
- Kaplan-Meier Estimate
- Models, Biological
- Neoplasm Invasiveness
- Neoplasm Staging
- Ovarian Neoplasms
(genetics, mortality, pathology)
- Prognosis
- Proportional Hazards Models
- Survival Rate
- Women's Health
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