Análise de polimorfismos nos genes CYP1A1, CYP17, COMT, GSTM1, receptor de estrogênios e progesterona em mulheres com carcinoma de ovário. / Analysis of polymorphisms in cytochrome P450c17 (CYP17), progesterone receptor (PROGINS), gluthatione S-transferase (GSTM1), Catechol-O-methyl transferase (COMT), and cytochrome P450c1A1 CYP1A1) in womens with ovarian cancer

Daniela Batista Leite

Objectives: To evaluate the association between polymorphisms of cytochrome P450c17 (CYP17), progesterone receptor (PROGINS), gluthatione S-transferase (GSTM1), Catechol-O-methyl transferase (COMT), and cytochrome P450c1A1 CYP1A1) genes in patients with and without ovarian cancer and to analyze the eventual association of these polymorphisms with clinical and pathological variables. Methods: A total of 103 ovarian cancer patients were seen at the Oncological Surgery Outpatients Clinic, Department of Gynecology - Universidade Federal de São Paulo - Escola Paulista de Medicina (UNIFESP-EPM) and at the Oncological Gynecology Outpatients Clinic, Division of Gynecology and Obstetrics, Hospital do Servidor Público Estadual de São Paulo Francisco Morato Oliveira (HSPE-FMO). The control group I comprised 282 patients and control goroup II comprised 141 patients seen at the Climacteric Sector, Division of Gynecological Endocrinology, Department of Gynecology - UNIFESP-EPM. The DNA was extracted from oral mucosa cells and genotyping for PROGINS, GSTM1 and CYP17 polymorphism was carried out by means of PCR-RFLP. Results: A significant association was observed between frequency of PROGINS polymorphism and development of ovarian cancer (p<0.0001). Furthermore, a significant association between the frequency of polymorphisms ER-PvuII, ERXbaI e ER-HaeIII (p = 0.03, p <0.00001 and p = 0.04, respectively) and the development of ovarian cancer and a trend of association between the presence of ER-MspI polymorphism (p=0.07) with the carcinoma. Concerning CYP17, GSTM1, COMT and CYP1A1 polymorphisms, there was no statistically significant difference between the two groups. A significant association between the frequency of PROGINS polymorphism and familial antecedents was observed ((p=0.009). Conclusions: We concluded that differently from CYP17, GSTM1, COMT and CYP1A1 polymorphisms, which had no association between polymorphism and cancer, the PROGINS, ER-PvuII, ER-XbaI and ER-HaeIII polymorphisms were positively associated with ovarian cancer.

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