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androstenedione/tumori dojke
Veza se sprema u međuspremnik
Page 1 od 502 rezultati
Reliability of immunoradiometric assays for sex-hormone binding globulin, androstenedione, 17-Beta estradiol and tumor-markers cea and cb15.3 to assess the biological response of megestrol-acetate treatment in patients with advanced breast-cancer.
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This study evaluated the effect of megestrol acetate administration on the serological assessment of some sex steroid hormones in women with advanced hormone-sensitive breast cancer. The serum levels of 17-beta estradiol, androstenedione and sex hormone binding globulin (SHBG) were measured by means
Ability of lymphocytes infiltrating breast-cancer tissue to convert androstenedione.
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Lymphocytes were isolated from 43 surgical samples of breast cancer after tumor enzyme digestion and Ficoll/Verographine procedure. In all, 23 specimens from lymphocytic-tissue infiltrates were analyzed (in some cases, material from 2 or 3 patients was combined). The ability of tumor-infiltrating
ANN-QSAR model for virtual screening of androstenedione C-skeleton containing phytomolecules and analogues for cytotoxic activity against human breast cancer cell line MCF-7.
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The present study deals with the development of an artificial neural network based quantitative structure activity relationship (QSAR) model for virtual screening of active compounds which contain androstenedione carbonskeleton or their similar skeleton at the core. An empirical data modeling (with
Aromatisation of androstenedione by human breast cancer tissue: correlation with hormone receptor activity and possible biologic significance.
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The conversion of 1 beta [3H] androstenedione to estrone in the presence of NADPH by breast cancer homogenates was assessed in tumors from 35 subjects together with estrogen and progesterone receptor concentration. Breast cancers from post menopausal women had significantly higher aromatase activity
Serum concentrations of estrone, androstenedione, testosterone and sex-hormone-binding globulin in postmenopausal women with breast cancer and in age-matched controls.
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The concentrations of estrone (E1), androstenedione (A), testosterone (T) and sex-hormone-binding globulin (SHBG) in the serum were determined in 122 postmenopausal women, unselected with respect to age and stage of disease and with a newly diagnosed breast cancer. The results were compared with
Failure of breast cancer cells in long-term culture to aromatize androstenedione.
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The ability of breast cancer cells in long-term tissue culture to aromatize androstenedione to estrone and estradiol was examined. (3H) androstenedione (1.1 x 10(-7)M) was incubated with 9 cell lines of human breast cancer and one line derived from a dimethylbenz(a)anthracene induced rat mammary
Effect of treatment with 4-hydroxyandrostenedione on the peripheral conversion of androstenedione to estrone and in vitro tumor aromatase activity in postmenopausal women with breast cancer.
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The effect of treatment with the aromatase inhibitor, 4-hydroxyandrostenedione (4-OHA) on the peripheral conversion of androstenedione to estrone has been examined in eight postmenopausal women with advanced breast cancer. Before treatment conversion of androstenedione to estrone ([p]AEIBB) ranged
Inhibition of aromatase activity in MCF-7aro human breast cancer cells by the natural androgens testosterone and androstenedione.
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BACKGROUND
The human breast contains all the enzymes responsible for local bioformation of estradiol (E2). Two principal pathways are implicated in the last steps of E2 formation: the 'aromatase' which transforms androgens into estrogens, and the 'sulfatase' which converts estrogen sulfates into
Inhibition of peripheral aromatization of androstenedione to estrone in postmenopausal women with breast cancer using delta 1-testololactone.
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To determine if delta 1-testololactone can inhibit the peripheral aromatization of androstenedione (delta), nine postmenopausal women with metastatic breast cancer were studied before and after 2 weeks of therapy with 250 mg of the drug, given every 6 h by mouth. The conversion ratio of delta to
Androstenedione and testosterone in ovarian venous and peripheral plasma during ovariectomy for breast cancer.
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Plasma dehydroepiandrosterone sulfate, androstenedione and cortisol, and urinary free cortisol excretion in breast cancer.
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Plasma androstenedione levels in women with breast cancer.
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[Conversion of androstenedione in the lymphocytes infiltrating the breast tumor tissue].
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AIB1:ERα transcriptional activity is selectively enhanced in aromatase inhibitor-resistant breast cancer cells.
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OBJECTIVE
The use of aromatase inhibitors (AI) in the treatment of estrogen receptor (ER)-positive, postmenopausal breast cancer has proven efficacy. However, inappropriate activation of ER target genes has been implicated in the development of resistant tumors. The ER coactivator protein AIB1 has
Aromatase inhibitors: new endocrine treatment of breast cancer.
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Estrogens are involved in numerous physiological processes and have crucial roles in certain disease states such as mammary carcinoma. Estradiol, the most potent endogenous estrogen, is biosynthesized from androgens by the cytochrome P450 enzyme complex called aromatase. Aromatase is found in breast
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