Increased estrogen 2-hydroxylation in obese women using oral indole-3-carbinol.
Mots clés
Abstrait
OBJECTIVE
To investigate whether the dietary phytochemical, indole-3-carbinol (13C), influences the level of estradiol 2-hydroxylation in obese women.
METHODS
A clinical intervention study involving the ingestion of purified 13C, 400 mg, for two months.
METHODS
Five healthy, overweight, premenopausal women (age: 35-47 y, body mass index (BMI): 27-53 kg/m2).
METHODS
Two estrogen metabolites, 2-hydroxyestrone (2OHE1) and estriol (E3), were measured by radioimmunoassay in untimed overnight urine samples, before and after ingestion of 13C.
RESULTS
The ratio of urinary estrogens, 2OHE1/E3, was significantly increased in obese women following 13C, reflecting induction of 2-hydroxylation in these women.
CONCLUSIONS
Obese premenopausal women experience increased estrogen 2-hydroxylation in response to the dietary agent, 13C, similar to non-obese women. This response to 13C may result in a hormonal milieu that helps reduce estrogen-dependent cancer risk.
