Bone metabolism in postmenopausal women who were treated with a gonadotropin-releasing hormone agonist and tibolone

Stefano Palomba, Michele Morelli, Costantino Di Carlo, Roberto Noia, Massimiliano Pellicano, Fulvio Zullo
In: Fertility and Sterility · 2002 · vol. 78(1) , pp. 63–68 · doi:10.1016/s0015-0282(02)03149-7 · PMID:12095492 · W2003380666
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This study investigated the effects of gonadotropin-releasing hormone agonist and tibolone treatment on bone metabolism in postmenopausal women.

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Abstract

ObjectiveTo study the bone metabolism in postmenopausal women who have been treated with gonadotropin-releasing hormone agonist (GnRH-a) and tibolone.DesignProspective, open, controlled clinical trial.SettingDepartment of Gynecology and Obstetrics, University of Catanzaro, Catanzaro, Italy.Patient(s)One hundred twenty perimenopausal women with symptomatic uterine leiomyomas (groups A and B), and 40 healthy control women who underwent a normal spontaneous menopause (group C).Intervention(s)Treatment for 12 months with leuprolide acetate plus tibolone (group A) or hysterectomy with bilateral oophorectomy (group B).Main outcome measure(s)Lumbar spine bone mineral density (BMD) and bone turnover markers at entry into the study, after medical treatment (only group A), and 12 months after discontinuation medical treatment (group A) or after surgery (group B). The same parameters were noted in healthy women before and 12 months after menopause (retrospective control group, group C).Result(s)At the women's entry into the study, no significant difference in BMD and bone turnover markers was detected between groups A and B. In group A, no significant variation in BMD or bone turnover markers was observed 12 months after medical treatment in comparison with baseline. At 12 months after discontinuation of treatment (in women who had achieved menopause) and after surgery, we observed a statistically significant decrease in BMD and in bone turnover markers in both groups in comparison with baseline. At 12 months after they became menopausal, we also observed a statistically significant reduction in BMD and in bone turnover markers in control group C. At the same 12-month follow-up visit, a statistically significant difference in BMD and in bone turnover markers was detected when comparing groups A and B with group C.Conclusion(s)Women previously treated with GnRH-a and tibolone similar to women who are menopausal as a result of surgery, have higher bone loss after menopause.

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