Abstract
To investigate the relationship between hypogonadism and altered amino acid metabolism in patients with liver cirrhosis, we measured the basal levels of plasma testosterone, estradiol, and free amino acids, plus urinary 3-methylhistidine excretion, in 16 control and 19 cirrhotic patients. The concentration of plasma testosterone correlated significantly with that of plasma branched-chain amino acids, and inversely with urinary 3-methylhistidine excretion. This suggests that hypogonadism causes a disturbance in amino acid metabolism at least partly related to an augmented muscle protein turnover.
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