Objective: To study the endocrinologic and metabolic effects of metformin in combination with compound cyproterone acetate (CPA) on patients with polycystic ovarian syndrome (PCOS).
Methods: A prospective study involved total 45 PCOS patients as group A and 20 non-PCOS infertility patients as control (group B). Complete baseline work-up including body mass index (BMI), waist/hip ratio (WHR), ferriman-Gallwey score (FGS), gonadotrophin, testosterone (T), sex hormone-binding globulin (SHBG), dehydroepiandrosterone sulfate (Ds), insulin (FI) and glucose tolerance test, were performed in all patients. Patients in group A were treated with CPA alone (group A1), metformin alone (group A2) or combination of CPA with metformin (group A3), respectively by randomization. At the end of 12-week therapy, subjects were re-evaluated and above parameters were measured.
Results: Women in group A had significant increases in BMI, WHR, FGS, luteinizing hormone (LH), T, FI, insulin resistance, and significantly decrease in high-density lipoprotein (HDL)-C comparing with the control group (P < 0.01). No significant difference among A1, A2 and A3 was found at baseline. LH, T, free testosterone (FT) were significant decreased from (13.9 +/- 5.9) IU/L, (2.1 +/- 0.8) nmol/L and (2.8 +/- 2.3) nmol/L respectively to (5.8 +/- 2.2) IU/L, (1.2 +/- 0.4) nmol/L and (0.8 +/- 0.5) nmol/L respectively and SHBG was significant increased from (99 +/- 42) nmol/L to (187 +/- 64) nmol/L in group A3, when compared with LH, T and FT from (13.8 +/- 7.6) IU/L, (2.2 +/- 1.1) nmol/L and (2.5 +/- 1.9) nmol/L respectively to (11.8 +/- 6.5) IU/L, (1.8 +/- 0.8) nmol/L and (1.7 +/- 1.0) nmol/L respectively and SHBG from (99 +/- 40) nmol/L to (120 +/- 51) nmol/L in group A2 (P < 0.05 approximately 0.001). HDL-C were significantly increased from (1.5 +/- 0.3) mmol/L to (1.8 +/- 0.3) mmol/L in group A3 comparing with HDL-C from (1.5 +/- 0.4) mmol/L to (1.6 +/- 0.4) mmol/L in group A1 (P < 0.001).
Conclusions: The PCOS patients treated with metformin in combination with compound cyproterone acetate may be more effective in inhibiting hyperandrogen and hypersecretion of LH than metformin alone and more obvious in improving lipid profiles than CPA alone.
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