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  • Title: Glucose metabolism and insulin resistance in women with polycystic ovary syndrome during therapy with oral contraceptives containing cyproterone acetate or desogestrel.
    Author: Cagnacci A, Paoletti AM, Renzi A, Orrù M, Pilloni M, Melis GB, Volpe A.
    Journal: J Clin Endocrinol Metab; 2003 Aug; 88(8):3621-5. PubMed ID: 12915645.
    Abstract:
    Oral contraceptives slightly deteriorate insulin sensitivity. The present study investigated whether they may further unbalance the glucose metabolism of lean women with polycystic ovary syndrome (PCOS). Women with PCOS were assigned to receive for 6 months the biphasic association of 40/30 micro g ethinyl estradiol (EE) and 25/125 micro g desogestrel (DSG; n = 10) or the monophasic association of 35 micro g EE and 2 mg cyproterone acetate (CPA; n = 10). Glucose tolerance was investigated by an oral glucose tolerance test (OGTT). Glucose utilization dependent [insulin sensitivity (SI)] or independent (Sg) of insulin was investigated by the minimal model method applied to a frequently sampled iv glucose tolerance test. EE/DSG increased the response of C peptide to OGTT (1413 +/- 113 vs. 2053 +/- 213 area under the curve; P < 0.009) and the C peptide/insulin ratio (0.085 +/- 0.01 vs. 0.134 +/- 0.01 area under the curve; P < 0.003). It also increased the Sg (0.026 +/- 0.002 vs. 0.034 +/- 0.003; P < 0.04) and decreased the SI (2.40 +/- 0.26 vs. 1.68 +/- 0.27; P < 0.01). EE/CPA did not modify responses to OGTT of glucose, insulin, C peptide, or C peptide/insulin ratio. It did not modify Sg and significantly increased SI (1.47 +/- 0.38 vs. 3.27 +/- 0.48; P < 0.04). The present study indicates that EE/CPA improves SI, whereas EE/DSG impairs SI, but improves insulin clearance. The long-term metabolic effects of these two compounds on women with PCOS require further investigations.
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