Endocrine and metabolic effects of insulin sensitizers in the treatment of patients with polycystic ovary syndrome and hyperinsulinaemia

We evaluated 16 women with polycystic ovary syndrome (PCOS) and 67 controls, aged 18-34 years. All subjects had an oral glucose tolerance test (OGTT), showing a normal response. They were subdivided into 2 groups (normoinsulinaemic, hyperinsulinaemic) undergoing 7 days of octreotide treatment. This caused modifications in body mass index, waist-hip ratio and blood pressure. No modifications were observed in basal luteinizing hormone (LH), follicle-stimulating hormone, androgens, 17alpha-hydroxyprogesterone, oestradiol, sex-hormone-binding globulin (SHBG), prolactin and cortisol serum concentrations in normoinsulinaemic patients. A significant decrease in the concentration of LH, androgens, and a significant increase in SHBG were observed in the hyperinsulinaemic patients. In hyperinsulinaemic patients, the treatment restored a regular insulinaemic response to an OGTT. No modifications of glycaemic response were detected in normoinsulinaemic ones. In hyperinsulinaemic patients, a decompensation of the glycaemic response was observed. Several agents (insulin sensitizers) decrease insulin secretion and androgen concentration. They could be considered an approachable long-term therapy for hyperinsulinaemic hyperandrogenic patients. In the next few years the pharmacotherapy for PCOS could be greatly expanded, allowing some patients, such as hyperinsulinaemic ones, to be treated with insulin sensitizers.