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    Effect of androgen replacement therapy on atherosclerotic risk markers in young-to-middle-aged men with idiopathic hypogonadotropic hypogonadism
    (Wiley, 2015) Dogan, Bercem Aycicek; Karakilic, Ersen; Tuna, Mazhar Muslum; Arduc, Ayse; Berker, Dilek; Gueler, Serdar
    ObjectiveIdiopathic hypogonadotropic hypogonadism is a rare disorder. This study evaluated the effect of androgen replacement therapy on atherosclerotic risk markers in young-to-middle-aged men with this disorder. Design and methodsForty-three male patients aged 30 (range: 24-39years) who were newly diagnosed with idiopathic hypogonadotropic hypogonadism and 20 age-, sex- and weight-matched controls (range: 26-39years) were included in the study. Androgen replacement therapy was given according to the Algorithm of Testosterone Therapy in Adult Men with Androgen Deficiency Syndromes (2010; Journal of Clinical Endocrinology and Metabolism, 95, 2536). The patients were assessed at a pretreatment visit and 3 and 6months after the treatment. Inflammatory markers and lipid parameters were evaluated. Endothelial function was assessed with brachial flow-mediated dilation of a brachial artery and high-resolution ultrasonography of the carotid intima-media thickness. ResultsThe carotid intima-media thickness (P<0001) was higher and the brachial flow-mediated diameter (P=0002) was lower in patients with idiopathic hypogonadotropic hypogonadism compared to the control subjects at the pretreatment visit. There was a negative correlation between the total testosterone level and carotid intima-media thickness (r=-0556, P=<0001). The carotid intima-media thickness and per cent flow-mediated diameter were significantly improved in the patient group 6months after the androgen replacement therapy (P=0002 and 0026, respectively). ConclusionsThis study indicated that low total testosterone levels can be considered a significant marker of atherosclerosis in patients with idiopathic hypogonadotropic hypogonadism and that androgen replacement therapy significantly reduces atherosclerotic risk markers in these patients after 6months.