Estrogen production and metabolism in normal postmenopausal women and postmenopausal women with breast or endometrial cancer.
The metabolic clearance rates of estradiol in postmenopausal women with breast cancer (1269 +/- 370 1/24 hr, mean +/- S.D.) or endometrial cancer (1320 +/- 238 1/24 hr) were significantly higher than in normal postmenopausal women (922 +/- 238 1/24 hr). The metabolic clearance rates of estrone were elevated in women with endometrial cancer (2012 +/- 749 1/24 hr) or with conditions associated with an increased risk for breast or endometrial cancer (1830 +/- 413 1/24 hr) compared with values for normal postmenopausal women (1321 +/- 301 1/24 hr). The production rate of estradiol was only increased in women with breast cancer. Significant correlations were found between subjects' percentage of ideal body wt and the metabolic clearance rates of estrone and estradiol and also the production rate of estrone. The increased clearance rates may reflect differences in either the binding of estrogens to plasma proteins or the tissue metabolism of estrogens in cancer patients.
D000368:Aged; D001835:Body Weight; D001943:Breast Neoplasms / Q000378:metabolism*; D004714:Endometrial Hyperplasia / Q000378:metabolism; D004958:Estradiol / Q000378:metabolism*; D004970:Estrone / Q000378:metabolism*; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D014594:Uterine Neoplasms / Q000378:metabolism*
D004970:Estrone; D004958:Estradiol