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Biomedical subjects

G G Gordon

Publications and source records attributed to G G Gordon.

At least 73 records · Page 4Linked to original sources
PubMed1975

Estrogen metabolism in hyperthyroidism and in cirrhosis of the liver.

Estrogen metabolism was studied in spontaneous hyperthyroidism (Graves disease) and in alcoholic cirrhosis of the liver. The plasma concentration of estradiol-17beta (PCE2) was increased in men with hyperthyroidism. Although the metabolic clearance rate of estradiol-17beta (MCRE2) was reduced, the production rate (PR) of the steroid was increased above normal. The MCRE2 was also decreased in women with hyperthyroidism but the PCE2 and PRE2 was unchanged from normal. The conversion ratio of estradiol-17beta (CRE2E1) was increased in both hyperthyroid men and women. The PCE2 was significantly increased in men with cirrhosis of the liver. The MCRE2 was normal and this resulted in an increase in the PRE2 in this disorder. The CRE2E1 was significantly higher than normal. The plasma concentration of estrone (E1) was elevated in men with both disorders.

Adult↗
PubMed1975

Conversion of androgens to estrogens in cirrhosis of the liver.

The contribution, by peripheral conversion, of androstenedione and testosterone to the circulating estrogens was determined in men with cirrhosis of the liver. The conversion ratio of androstenedione to estrone, estradiol and testosterone and the conversion ratio of testosterone to estrone (but not estradiol) and androstenedione were significantly increased. The plasma concentrations of androstenedione and testosterone were increased and decreased respectively; the mean plasma concentration of androstenedione being similar to that found in normal women. The metabolic clearance rate of androstenedione was not altered in cirrhosis although the metabolic clearance rate of testosterone was decreased. The production rate of androstenedione was elevated while that of testosterone was reduced. The instantaneous contribution of plasma androstenedione to estrone and estradiol was increased in cirrhosis as was the contribution of testosterone to estrone (but not to estradiol). Thus the increased estradiol levels in cirrhosis result, in large part, from increased peripheral conversion from the androgens. The percent contribution of plasma testosterone to plasma androstenedione was decreased although the absolute amount derived by conversion was normal. The percent contribution of plasma androstenedione to plasma testosterone was increased sevenfold in cirrhosis. The fraction of the daily androstenedione production derived from the plasma testosterone pool was not significantly altered. However, a significant fraction of the daily production rate of testosterone was derived from androstenedione. Thus, 15% of the circulating testosterone is not secreted but is derived by peripheral conversion from androstenedione. Normal levels of gonadotropins were found in cirrhosis.

Adult↗