The efficacy of selective cyclooxygenase 2 inhibitors in the treatment of genital endometriosis

External genital endometriosis is characterized by the processes of angiogenesis, neurogenesis, impaired apoptosis, local inflammation of the tissues, secretion of estradiol, and cell proliferation. In a similar manner, prostaglandin E2 affects  tissues. The safest drugs that overwhelm COX-2 activity and inhibit the expression of prostaglandin E2 are selective COX-2 inhibitors. As a mediator of inflammation, prostaglandin E2 is involved in all inflammatory processes. It induces the expression of local P450 aromatase and the anti-apoptotic gene Bcl-2. E2 also possesses immunosuppressive-mediated activity and inhibits the synthesis of cytokines IFNγ, TNFα, and IL-12, IL-1β-mediated expression of chemokines, the proliferation of T- and B-cells and reduces the cytotoxic activity of NK cells, creating a background of the immunosuppressive characteristic of endometriosis [1–3].

This study included 100 patients of reproductive age (aged 22−35 years) with a confirmed diagnosis of external genital endometriosis of degree II–IV. Fifty patients received 100 mg of celecoxib in monotherapy and in combination with 2 mg of dienoguest. The control group included 50 people receiving monotherapy with 2 mg of dienogest. The effectiveness of therapy was assessed using the visual analog scale (VAS) and on the basis of the dynamics of algodismenorrhea, pain during coitus, clinical examination, and the patient’s subjective assessment of the degree of irritability and severity of depressive syndrome. The effectiveness of the treatment was evaluated according to MRI and ultrasound of the pelvic organs throughout the study. To control for possible complications of the therapy, the patients performed a comprehensive dynamic survey assessing the indicators of general blood analysis and the blood coagulation system. In the group with the combined application of celecoxib and dienoguest, a clinically significant reduction in pain syndrome and a decrease in the degree of irritability and depressive syndrome were noted relative to the control group. No side effects of celecoxib on the body systems were identified throughout the study. Thus, celecoxib can be recommended as a safe and effective combination therapy for endometriosis.