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17 alpha hydroxyprogesterone/рак
Линкът е запазен в клипборда
Страница 1 от 22 резултата
Effects of high-dose ketoconazole and dexamethasone on ACTH-stimulated adrenal steroidogenesis in orchiectomized prostatic cancer patients.
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The effects of high-dose ketoconazole (i.e. 400 mg every 8 h) therapy on adrenal steroidogenesis were investigated in 7 patients with advanced prostatic cancer who no longer responded to orchiectomy. An ACTH challenge was performed before and on days 14 and 28 of high-dose ketoconazole treatment.
Response of a mucinous ovarian tumor of borderline malignancy to human chorionic gonadotropin.
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Plasma and urinary steroid hormones were measured before and after an injection of human chorionic gonadotropin (hCG) to a postmenopausal woman with a mucinous ovarian tumor of borderline malignancy. Hormones were also measured in blood from a vein draining the tumor, and circulating gonadotropins
Effects of high dose ketoconazole therapy on the main plasma testicular and adrenal steroids in previously untreated prostatic cancer patients.
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In vitro, ketoconazole has been shown to block testicular and adrenal 17,20-lyase, which converts progestins to androgens. At higher concentrations, it also inhibits 11 beta-hydroxylase, 20,22-desmolase and 17 alpha-hydroxylase. To determine the differential hormonal effects of a 2-week ketoconazole
Multivariate analysis of plasma hormones in patients with metastatic prostate cancer receiving combined LHRH-analog and antiandrogen therapy.
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The following hormones, the plasma protein SHBG, and the tumor markers prostatic acid phosphatase (PAP) and prostate-specific antigen (PSA) were assayed at 18 time-points over 1 month during a double-blind randomized study in 36 stage D2 cancer patients receiving either "buserelin+placebo" or
In an in-vitro model using human fetal membranes, 17-α hydroxyprogesterone caproate is not an optimal progestogen for inhibition of fetal membrane weakening.
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The progestogen 17-α hydroxyprogesterone caproate (17-OHPC) is 1 of only 2 agents recommended for clinical use in the prevention of spontaneous preterm delivery, and studies of its efficacy have been conflicting. We have developed an in-vitro model to study the fetal membrane weakening process that
Sex steroid biosynthesis enzymes in ovarian sex-cord stromal tumors.
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Previous studies on neoplastic and hyperplastic ovarian lesions using paraffin-embedded material have demonstrated immunolocalization of sex steroid biosynthetic enzymes (SSBEs): P-450 side chain cleavage (P-450 SCC), which converts cholesterol to pregnenolone; 3 beta-hydroxysteroid dehydrogenase (3
[Clinico-morphological changes during treatment of endometrial cancer with progestins].
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The results of the complex clinico-morphological study of the effect of 17-a-hydroxyprogesterone-caproate are reported in 71 patients aged from 37 to 75. Stage I was noted in 17 patients, stage II--in 51, stage III--in 3. A total dosage was 5,0; 10,0; 20,0 and 30,0 for the course of treatment.
Vorozole (R83842) in the treatment of postmenopausal advanced breast cancer: relationship of serum levels of vorozole and clinical results (a study of the EORTC Breast Cancer Cooperative Group).
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The new non-steroidal aromatase inhibitor vorozole (R83842) was administered orally at a single daily dose of 2.5 mg to 27 postmenopausal women with advanced breast cancer in a phase II trial as second-line endocrine treatment. The observed objective response rate of 30% and good tolerability of the
Evaluation of cortisone-heparin and cortisone-maltose tetrapalmitate therapies against rodent tumors. I. Biological studies.
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The antitumor activity of either cortisone-heparin or cortisone-maltose tetrapalmitate combination or both was tested against two animal tumor models. The first model was orthotopically implanted bladder tumor established in syngeneic Fisher 344 rats. Shrinkage and growth arrest of the tumors were
[Progestogen therapy in the treatment of endometrial cancer--clinical results and mechanism of steroid action].
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The use of medroxyprogesterone acetate (MPA) in therapy of patients with endometrial cancer has been recently examined by the Japan Gynecological Cancer Treatment Group. The response rate of oral MPA was 23.6% (13/55 evaluables) and the average period up to the onset of response was 15.2 weeks (4-28
Letrozole. A review of its use in postmenopausal women with advanced breast cancer.
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Letrozole is an oral reversible nonsteroidal aromatase inhibitor. Clinical tracer studies show that it inhibits peripheral aromatase by over 98% and suppresses blood and urinary estrogen levels by over 95% after 2 weeks of treatment in postmenopausal women. Letrozole also significantly inhibits
Steroid hormone profiles in women treated with aminoglutethimide for metastatic carcinoma of the breast.
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Recent evidence suggests that aminoglutethimide (AG), a known inhibitor of adrenal steroidogenesis, is a potent blocker of aromatase and thus of estrogen production. These properties of AG have been exploited clinically to reduce the biosynthesis of adrenal estrogen precursors and extraglandular
Effects of the aromatase inhibiting delta 1,4-bisnorcholadienic acid on the steroid biosynthesis in the human ovary in vitro.
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Compounds capable of limiting oestrogen production may be useful for controlling fertility and growth of oestrogen-dependent tumors. To examine the direct effects of the aromatase inhibiting delta 1,4-bisnorcholadienic acid on the ovarian biosynthesis of steroids, tissue slices obtained from two
Effects of progestational agents in treatment of endometrial carcinoma.
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Progestational agents induced an objective response in 11.2% of 155 patients with advanced primary or recurrent endometrial carcinoma. Response rates decreased with decreasing tumor differentiation from 40% with Broders grade 1 lesions to 17.5, 2.4, and 0%, respectively, with grades 2, 3, and 4. 17
Progesterone 16 alpha-hydroxylase activity is catalyzed by human cytochrome P450 17 alpha-hydroxylase.
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Progesterone and pregnenolone are metabolized to 17 alpha-hydroxysteroids by a cytochrome P450-dependent 17 alpha-hydroxylase (P450c17). The same enzyme can also catalyze the removal of the side-chain of these 17 alpha-hydroxylated steroids to yield androstenedione and dehydroepiandrosterone,
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