To determine whether insulin sensitizing drugs would improve ovulation and T levels in women with polycystic ovary syndrome (PCOS), without clinical or biochemical criteria indicating insulin resistance and whether th...To determine whether insulin sensitizing drugs would improve ovulation and T levels in women with polycystic ovary syndrome (PCOS), without clinical or biochemical criteria indicating insulin resistance and whether the combination of two distinct insulin sensitizing drugs would be of any benefit over either drug alone. Randomized controlled double blind trial. A referral center in Caracas, Venezuela. One hundred twentyeight nonobese PCOS women with normal indices of insulin sensitivity that is, normal glucose tolerance, fasting insulin, peak insulin during an oral glucose tolerance test (OGTT), and fasting glucose to insulin ratio. Twenty eight women were lost to follow up initially and did not receive any intervention. One hundred women received twice daily one of the following for 6 months: metformin (850 mg), rosiglitazone (4 mg), combination of both drugs, or at least one placebo. Frequencies of ovulation and serum free T after 6 months. Frequencies of ovulation were higher after treatment with an insulin sensitizing drug (ovulations per subject in 6 months: metformin, 3.3; rosiglitazone, 2.4; and combination, 3.4) than with placebo (0.4). Ovulatory frequencies increased significantly more with metformin than rosiglitazone, and the combination was not more potent. After treatment, serum free- T levels were comparable among all active treatment groups (metformin: 2.34 pg/mL, rosiglitazone: 3.06 pg/mL, and combination: 2.39 pg/mL) and were significantly lower than in the placebo group (7.26 pg/mL). Compared with placebo, fasting insulin levels, area under the insulin curve during OGTT, the homeostatic model assessment of insulin sensitivity, and OGTT derived insulin sensitivity index improved significantly after metformin or combination therapies but not after rosiglitazone. These findings suggest that insulin sensitizing drugs increase ovulatory frequency and ameliorate hyperandrogenemia, even in nonobese women with PCOS who appear to have normal insulin sensitivity.展开更多
文摘To determine whether insulin sensitizing drugs would improve ovulation and T levels in women with polycystic ovary syndrome (PCOS), without clinical or biochemical criteria indicating insulin resistance and whether the combination of two distinct insulin sensitizing drugs would be of any benefit over either drug alone. Randomized controlled double blind trial. A referral center in Caracas, Venezuela. One hundred twentyeight nonobese PCOS women with normal indices of insulin sensitivity that is, normal glucose tolerance, fasting insulin, peak insulin during an oral glucose tolerance test (OGTT), and fasting glucose to insulin ratio. Twenty eight women were lost to follow up initially and did not receive any intervention. One hundred women received twice daily one of the following for 6 months: metformin (850 mg), rosiglitazone (4 mg), combination of both drugs, or at least one placebo. Frequencies of ovulation and serum free T after 6 months. Frequencies of ovulation were higher after treatment with an insulin sensitizing drug (ovulations per subject in 6 months: metformin, 3.3; rosiglitazone, 2.4; and combination, 3.4) than with placebo (0.4). Ovulatory frequencies increased significantly more with metformin than rosiglitazone, and the combination was not more potent. After treatment, serum free- T levels were comparable among all active treatment groups (metformin: 2.34 pg/mL, rosiglitazone: 3.06 pg/mL, and combination: 2.39 pg/mL) and were significantly lower than in the placebo group (7.26 pg/mL). Compared with placebo, fasting insulin levels, area under the insulin curve during OGTT, the homeostatic model assessment of insulin sensitivity, and OGTT derived insulin sensitivity index improved significantly after metformin or combination therapies but not after rosiglitazone. These findings suggest that insulin sensitizing drugs increase ovulatory frequency and ameliorate hyperandrogenemia, even in nonobese women with PCOS who appear to have normal insulin sensitivity.
