Combined Effect of the PGR +331C > T, CYP17A1 -34A > G and CYP19A1 1531G > A Polymorphisms on the Risk of Developing Endometriosis

Author:

Cardoso Jéssica12,Machado Daniel1,Ferrari Renato3,Silva Mayara1,Berardo Plínio4,Perini Jamila12

Affiliation:

1. Research Laboratory of Pharmaceutical Sciences, Pharmacy Unit, Centro Universitário Estadual da Zona Oeste, Rio de Janeiro, Rio de Janeiro, Brazil

2. Post-graduation in Public Health and Natural Environment Program, Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz (National School of Public Health, Oswaldo Cruz Foundation), Rio de Janeiro, Rio de Janeiro, Brazil

3. Gynecology Institute, Universidade Federal do Rio de Janeiro, Hospital Moncorvo Filho, Rio de Janeiro, Rio de Janeiro, Brazil

4. Gynecology Service, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Rio de Janeiro, Brazil

Abstract

Purpose To evaluate the magnitude of the association of the polymorphisms of the genes PGR, CYP17A1 and CYP19A1 in the development of endometriosis. Methods This is a retrospective case-control study involving 161 women with endometriosis (cases) and 179 controls. The polymorphisms were genotyped by real-time polymerase chain reaction using the TaqMan system. The association of the polymorphisms with endometriosis was evaluated using the multivariate logistic regression. Results The endometriosis patients were significantly younger than the controls (36.0 ± 7.3 versus 38.0 ± 8.5 respectively, p = 0.023), and they had a lower body mass index (26.3 ± 4.8 versus 27.9 ± 5.7 respectively, p = 0.006), higher average duration of the menstrual flow (7.4 ± 4.9 versus 6.1 ± 4.4 days respectively, p = 0.03), and lower average time intervals between menstrual periods (25.2 ± 9.6 versus 27.5 ± 11.1 days respectively, p = 0.05). A higher prevalence of symptoms of dysmenorrhea, dyspareunia, chronic pelvic pain, infertility and intestinal or urinary changes was observed in the case group when compared with the control group. The interval between the onset of symptoms and the definitive diagnosis of endometriosis was 5.2 ± 6.9 years. When comparing both groups, significant differences were not observed in the allelic and genotypic frequencies of the polymorphisms PGR +331C > T, CYP17A1 -34A > G and CYP19A1 1531G > A, even when considering the symptoms, classification and stage of the endometriosis. The combined genotype PGR +331TT/CYP17A1 -34AA/CYP19A11531AA is positively associated with endometriosis (odds ratio [OR] = 1.72; 95% confidence interval [95%CI] = 1.09–2.72). Conclusions The combined analysis of the polymorphisms PGR-CYP17A1-CYP19A1 suggests a gene-gene interaction in the susceptibility to endometriosis. These results may contribute to the identification of biomarkers for the diagnosis and/or prognosis of the disease and of possible molecular targets for individualized treatments.

Publisher

Georg Thieme Verlag KG

Subject

Obstetrics and Gynaecology

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