Hepatic uptake of sex steroids in men with alcoholic cirrhosis.
We attempted to determine to what extent the degree of liver function impairment might affect the hepatic uptake and, as a consequence, alter the systemic plasma levels of endogenous sex steroids in male patients with alcoholic cirrhosis. The plasma levels and hepatic uptake of the steroids dehydroepiandrosterone, androstenedione, testosterone, dihydrotestosterone, estrone, estradiol, progesterone, and 17-hydroxyprogesterone were assessed. Systemic plasma levels of testosterone and dehydroepiandrosterone were significantly (p less than 0.05) reduced, whereas those of androstenedione, estrone, and estradiol were significantly (p less than 0.05) elevated in men with alcoholic cirrhosis when compared to controls. Sex hormone binding globulin levels were also significantly elevated (p less than 0.01). The hepatic uptake of sex steroids depended on the degree of liver function impairment as shown by the linear significant relationship between their hepatic extractions and that of indocyanine green (r = 0.74-0.92, p less than 0.05; except for dihydrotestosterone, r = 0.17, not significant). In addition, the hepatic uptake of sex steroids depended on the binding affinity to sex hormone binding globulin. The higher the affinity for sex hormone binding globulin, the lower the hepatic uptake influenced by liver function impairment. It was estimated that hepatic clearances accounted for only 20%-50% of the metabolic clearance of sex steroids. No significant relationship between plasma levels of sex steroids and their hepatic clearance was found. We show here that in alcoholic cirrhosis the extent of hepatic uptake of sex steroids depends partly on the degree of liver function impairment and partly on the degree to which they are bound to sex hormone binding globulin. Production rate or peripheral metabolism, or both, rather than hepatic uptake alone may account for the altered circulating levels of sex steroids.
D000328:Adult; D012739:Gonadal Steroid Hormones / Q000378:metabolism*; D006801:Humans; D007208:Indocyanine Green; D008099:Liver / Q000378:metabolism*; D008104:Liver Cirrhosis, Alcoholic / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D012738:Sex Hormone-Binding Globulin / Q000378:metabolism*
D012739:Gonadal Steroid Hormones; D012738:Sex Hormone-Binding Globulin; D007208:Indocyanine Green