Maia Jr H.,Instituto da Mulher |
Maia Jr H.,Federal University of Bahia |
Coelho G.,IVI Salvador |
Women's Health | Year: 2012
Epigenetic changes favoring the transcription of the aromatase gene in the endometrium allow endometrial cells to survive in ectopic locations by producing estrogens that spare them from destruction through activated macrophages. Local estrogen production hastens prostaglandin synthesis by stimulating COX-2 activity, thus creating a self-perpetuating sequence of augmented estrogen formation and enhanced inflammation. Repetitive retrograde menstruation reintroduces aromatase-positive endometrial cells endowed with the capacity to implant and invade the peritoneum. In order to control endometriosis, an effective medication must inhibit aromatase, block COX-2, decrease fibrosis and induce amenorrhea. Within this framework, progestins, either alone or in the form of oral contraceptives, appear as first-line treatment for endometriosis owing to their capacity to block enzymes such as aromatase and COX-2. © 2012 Future Medicine Ltd.
Maia H.,CEPARH |
Haddad C.,CEPARH |
International Journal of Women's Health | Year: 2012
Objective: To investigate whether aromatase expression in the eutopic endometrium correlates with the presence and severity of endometriosis in patients with infertility and/or dysmenorrhea undergoing laparoscopy and hysteroscopy. Patients: The study involved 106 patients of reproductive age with symptoms of dysmenorrhea and infertility. Sixteen endometriosis-free asymptomatic patients were used as a control group. Methods: Concomitant laparoscopy and hysteroscopy was carried out in all cases. An endometrial biopsy was taken to determine aromatase p450 expression by immunohistochemistry. Endometriosis was staged according to the American Society of Reproductive Medicine classification. Results: Endometriosis was diagnosed by laparoscopy in 92/106 symptomatic patients. In this group, aromatase expression was detected in the eutopic endometrium of 66/92 patients with endometriosis (72%) and in 13/14 (95%) patients in the symptomatic, endometriosis-free group (P=0.09). Aromatase expression was not detected in any patients from the control group. In the endometriosis group, aromatase expression was detected in the eutopic endometrium of 28/45 patients (62%) with American Society of Reproductive Medicine classification stage 1 of the disease, in 11/14 patients (78%) with stage II, 14/20 patients (70%) with stage III, and in 12/13 patients (92%) with stage IV; however, the difference was only statistically significant between stages I and IV (P=0.04). Conclusion: Aromatase expression in the endometrium was associated with the presence of dysmenorrhea and infertility irrespective of the presence of endometriosis. When endometriosis was present, however, there was a tendency for aromatase expression to be positively correlated with dysmenorrhea severity. © 2012 Maia Jr et al, publisher and licensee Dove Medical Press Ltd.
Maia Jr. H.,CEPARH |
Casoy J.,CEPARH |
Athayde C.,CEPARH |
Valente Filho J.,CEPARH |
European Journal of Contraception and Reproductive Health Care | Year: 2010
Objective: To study Cox-2 expression in relation to bleeding patterns in patients using an oral contraceptive containing 3mg of drospirenone and 30μgof ethinylestradiol (DRSP/EE). Methods: Forty-three patients of reproductive age with symptoms of menorrhagia and dysmenorrhoea, who were submitted to endometrial resection, were enrolled. Twelve patients were in the proliferative phase and the remaining 31 were either currently using DRSP/EE or had discontinued its use four to eight days prior to hysteroscopy. Cox-2 and Ki-67 expression were determined in the endometrium using immunohistochemistry. Results: Cox-2 expression was significantly inhibited in the glandular epithelium of patients who became amenorrhoeic during DRSP/EE use; however, in patients with breakthrough bleeding and in those who had stopped oral contraceptive use, a significant increase occurred in Cox-2 expression in the endometrium. Ki-67 expression decreased significantly during DRSP/EE use, but returned to proliferative phase values four to eight days after discontinuation of treatment. Conclusion: These results suggest that endometrial bleeding during DRSP/EE use is associated with an increase in Cox-2 expression in the endometrium. A similar increase was also seen four to eight days following discontinuation of the oral contraceptive. © 2010 European Society of Contraception and Reproductive Health.
Maia Jr. H.,CEPARH |
Casoy J.,CEPARH |
Correia T.,CEPARH |
Athayde C.,CEPARH |
And 2 more authors.
Gynecological Endocrinology | Year: 2010
The objective of the present study was to determine whether there is an increase in endometrial inflammation associated with the occurrence of breakthrough bleeding in patients using an oral contraceptive in extended regimens. The presence of nuclear factor NF-κB and Cox-2 expression was determined by immunohistochemistry in endometrial samples removed by hysteroscopy from patients with breakthrough bleeding during continuous use of an oral contraceptive containing gestodene. All patients had a history of menorrhagia associated or not with the presence of uterine pathology. The percentage of endometria showing a positive staining reaction for NF-κB in cell nuclei was significantly higher in patients with breakthrough bleeding than in those with amenorrhea. Cox-2 expression in the endometrium was also significantly more frequent in patients with breakthrough bleeding. The occurrence of breakthrough bleeding in patients with uterine pathology using combined oral contraceptives is associated with the activation of endometrial inflammation through the NF-κB pathway. © 2010 Informa UK Ltd.