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  • Title: Effects of transdermal testosterone administration on insulin sensitivity, fat mass and distribution, and markers of inflammation and thrombolysis in human immunodeficiency virus-infected women with mild to moderate weight loss.
    Author: Herbst KL, Calof OM, Hsia SH, Sinha-Hikim I, Woodhouse LJ, Buchanan TA, Bhasin S.
    Journal: Fertil Steril; 2006 Jun; 85(6):1794-802. PubMed ID: 16759927.
    Abstract:
    OBJECTIVE: To determine the effects of raising serum T levels into the high normal female range by transdermal T administration on insulin sensitivity, fat volume, and markers of inflammation and thrombolysis in HIV-infected women with recent weight loss. DESIGN: Placebo-controlled, randomized clinical trial. SETTING: Academic clinical research center. PATIENT(S): Fifty-two HIV-infected, menstruating women with >5% weight loss over the prior 6 months and current T<33 ng/dL. INTERVENTION(S): Placebo or T patches twice weekly for 24 weeks to achieve nominal delivery of 300 microg T daily. MAIN OUTCOME MEASURE(S): Testosterone by liquid chromatography-tandem mass spectrometry, insulin sensitivity by the frequently sampled intravenous glucose tolerance test (FSIVGT), abdominal and thigh fat volumes by magnetic resonance imaging (MRI), and C-reactive protein (CRP) as a measure of inflammation and plasminogen-activated inhibitor-1 (PAI-1) levels as a marker of thrombolysis. RESULT(S): Serum and free T levels significantly increased into the high normal female range in T-treated but not placebo-treated women. Insulin sensitivity by FSIVGT, whole body, thigh SC, and intra-abdominal fat volumes, and CRP and PAI-1 levels did not change significantly in either group and were not significantly different between the two groups. Fasting insulin increased in the placebo group and fell slightly in the T group, resulting in significant differences in change between groups. CONCLUSION(S): Twenty-four weeks of elevation of serum T levels into the high normal female range in HIV-infected women with mild to moderate weight loss by transdermal T patches did not adversely affect insulin sensitivity, whole-body fat mass or regional fat distribution, or markers of inflammation and thrombolysis. More prolonged and larger studies are needed to determine the effects of higher doses of T on body composition and insulin sensitivity in women.
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