17 hydroxyprogesterone/рак на гърдата

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Multiple actions of synthetic 'progestins' on the growth of ZR-75-1 human breast cancer cells: an in vitro model for the simultaneous assay of androgen, progestin, estrogen, and glucocorticoid agonistic and antagonistic activities of steroids.

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This study was designed to assess the multiple steroid receptor mediated activities of a series of synthetic 'progestins' on breast cancer cell growth, using the human ZR-75-1 cell line which possesses functional estrogen (ER), androgen (AR), and glucocorticoid (GR) receptors as well as progesterone

An endocrine and pharmacokinetic study of four oral doses of formestane in postmenopausal breast cancer patients.

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43 postmenopausal breast cancer patients were treated orally with the aromatase inhibitor formestane (4-hydroxyandrostenedione) at daily doses of 62.5, 125, 250 or 500 mg for 4 weeks followed by 250 mg daily for a further 4 weeks. For some patients, 62.5 mg did not suppress serum oestradiol levels

Potency and selectivity of the non-steroidal aromatase inhibitor CGS 16949A in postmenopausal breast cancer patients.

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A selective inhibitor of aromatase is widely sought for the treatment of postmenopausal women with breast cancer. CGS 16949A has been shown to be a highly selective, potent inhibitor of aromatase in vitro. Its potency as an oestrogen suppressant and its selectivity were examined by treating 24

Sex hormones in postmenopausal women with breast cancer on tamoxifen.

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In 42 postmenopausal women with breast cancer aged 48-85 (mean age 62.4) years, the blood sex hormone levels were measured before and after 6 months of tamoxifen administration (20 mg daily). Follicle-stimulating hormone and luteinizing hormone levels decreased after tamoxifen administration (p <

Endocrine changes with the aromatase inhibitor fadrozole hydrochloride in breast cancer.

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Fadrozole hydrochloride is a potent aromatase inhibitor with proven clinical effectiveness. However, its optimal dose and its effects on serum aldosterone levels/electrolyte balance have been disputed. To resolve these issues, a double-blind randomised endocrine study of three doses of fadrozole

Biological activity of anastrozole in postmenopausal patients with advanced breast cancer: effects on estrogens and bone metabolism.

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BACKGROUND To study the short-term biological effect of anastrozole on serum estrogens, androgens, 17-hydroxyprogesterone (17OH-PGR), gonadotrophins, sex hormone binding globulin (SHBG) and bone metabolism markers. METHODS Thirty-four consecutive patients with advanced breast cancer received

Adrenal function in early and metastatic breast cancer: dexamethasone suppression of plasma cortisol.

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Plasma cortisol, 17-hydroxyprogesterone (17-OH-P), progesterone, FSH, LH and prolactin were determined by RIA, in 14 cancer patients without metastases aged between 40 and 74 years (6 cases of breast cancer: T123, N01, M0 and 8 with other forms of cancer). The cancer patients were investigated: (A)

Androgen levels during adjuvant endocrine therapy in postmenopausal breast cancer patients.

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OBJECTIVE To investigate plasma steroid hormone levels in postmenopausal breast cancer patients with and without adjuvant endocrine therapy and in healthy postmenopausal women. METHODS Steroid hormone levels in postmenopausal breast cancer patients treated with aromatase inhibitors (n = 32) were

The effect of the aromatase inhibitor, rogletimide (pyridoglutethimide), on guinea pig adrenal cell steroidogenesis and placental microsomal aromatase activity: comparison with aminoglutethimide and CGS 16949A.

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A dispersed guinea pig adrenal system has been used to study the effect of the aromatase inhibitor rogletimide (RGL) on adrenal steroidogenesis. The ACTH-stimulated release of cortisol, 17-hydroxyprogesterone (17-OHP) and androstenedione (A) was measured following exposure of adrenal cells to RGL,

Effect of an investigational CYP17A1 inhibitor, orteronel (TAK-700), on estrogen- and corticoid-synthesis pathways in hypophysectomized female rats and on the serum estradiol levels in female cynomolgus monkeys.

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Orteronel (TAK-700) is an investigational, non-steroidal inhibitor of CYP17A1 with preferential inhibition of 17,20-lyase in NCI-H295 cells. Estrogen is synthesized from androgen by aromatase activity, and the effect of orteronel on estrogen synthesis was therefore evaluated. First, it was confirmed

Mechanism of dissociation of cortisol and adrenal androgen secretion after removal of adrenocortical adenoma in patients with Cushing's syndrome.

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We investigated the mechanism of dissociation of cortisol and dehydroepiandrosterone sulfate (DHEA-S) secretion by the adrenal glands after the removal of an adrenal gland containing an adrenocortical adenoma in a patient with Cushing's syndrome. After removal of the adrenocortical adenoma, the

Determination of naturally occurring progestogens in bovine milk as their oxime derivatives using high performance liquid chromatography-electrospray ionization-tandem mass spectrometry.

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BACKGROUND Hormones and hormone-like substances which are present in the environment have been repeatedly accused of being the cause of most endocrine disruption. However, the possible role of endogenous hormones in food of animal origin deserves to be discussed as well. The relation between steroid

Phase I and endocrine study of exemestane (FCE 24304), a new aromatase inhibitor, in postmenopausal women.

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Aromatase inhibitors are a useful therapeutic option in the management of endocrine-dependent advanced breast cancer. A single-dose administration of exemestane (FCE 24304; 6-methylenandrosta-1,4-diene-3,17-dione), a new irreversible aromatase inhibitor, was investigated in 29 healthy postmenopausal

Hormone Levels in Pregnancy and Subsequent Risk of Maternal Breast and Ovarian Cancer: A Systematic Review.

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Some maternal hormone levels in pregnancy are associated with a higher risk of breast and ovarian cancer. This study systematically assessed the association between blood hormone levels measured in pregnancy and future risk of these cancers.Two reviewers

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