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Although androgen ablation has been the standard treatment for metastatic prostate cancer for > 50 years, our study shows that androgen supplementation therapy may be beneficial for treatment of certain types of human prostate cancer and that the use of 5 alpha-reductase inhibitors, such as finasteride or anti-androgens, in the general treatment of metastatic prostate cancer may require careful assessment.. Inhibition by androgens and stimulation by finasteride.When the human prostate cancer cell line, LNCaP 104-S, the growth of which is stimulated by physiological levels of androgen, is cultured in androgen-depleted medium for > estradiol 2mg side effects
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100 passages, the cells, now called
estradiol
LNCaP 104-R2, are proliferatively repressed by low concentrations of androgens. Prostatic volume was determined in six subjects by endorectal ultrasound scans. TP treatment of mice with LNCaP 104-R2 tumors reduced tumor androgen receptor and c-myc mRNA levels but increased
estradiol
prostate-specific antigen in serum- and prostate-specific antigen mRNA in tumors.
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LNCaP 104-R2 cells formed tumors in castrated male athymic nude mice. The decrease in the androstenedione to testosterone and estrone to estradiol ratios observed after hCG treatment, however, strongly suggests increased activity of the 17-ketosteroid reductase
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enzyme and an improvement of the testicular capacity for testosterone production.
Testosterone propionate (TP) treatment prevented LNCaP 104-R2 tumor growth and caused regression of established tumors in these mice. 187 /-
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26 pmol/L) was also
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noted, whereas androstanediol glucoronide (33.3 /- 6.4 vs. No changes in basal or stimulated levels of gonadotropin were observed. 26.3 /- 1.7 nmol/L) and a decrease in dihydrotestosterone (DHT) levels (1.45 /- 0.41 vs.
Within 1 week after
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TP implantation, LNCaP 104-R2 tumors exhibited massive necrosis with severe hemorrhage. 35.5 nmol/L) that could be explained, at least in part, by the reduction of testosterone metabolism
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resulting from the blockage induced by Finasteride ( Propecia ). 10.7 /-
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4.5 pmol) and PSA (1.6 /- 0.6 vs. 5 alpha-Dihydrotestosterone, but not 5 beta-dihydrotestosterone, 17 beta-estradiol, or medroxyprogesterone acetate, also inhibited LNCaP 104-R2 tumor growth. Finasteride treatment resulted in an improvement in the male pattern baldness and prostatic shrinkage that was associated with an increase in serum testosterone levels (17.2 /- 2.5 vs. Patients were evaluated symptoms wellbutrin overdose
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every 3
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months. Such a tumor-suppressive effect was not observed with tumors derived from LNCaP 104-S cells or androgen receptor-negative human prostate cancer PC-3 cells.
0.38 /- 0.10 nmol/L),
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causing a marked increase in that testosterone/DHT ratio. Human prostate tumor growth in athymic mice. There was a significant increase in the testosterone response to hCG during Finasteride ( Propecia ) therapy (delta. A significant increase in the serum levels of androstenedione (3.67 /- 0.49 vs. Serum gonadotropin, prostate-specific
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antigen (PSA), and sex hormone levels were determined basally and periodically during the treatment period. Three weeks later, these tumors sho fibrosis with infiltration of chronic
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inflammatory cells and scattered carcinoma cells exhibiting degeneration. 7.05 /- 0.70 nmol/L) and estradiol (132 /- 44 vs. Removal of TP or implantation
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of finasteride, a 5 alpha-reductase inhibitor, in nude mice bearing TP implants resulted in the regrowth of LNCaP 104-R2 tumors.
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Effect of Finasteride ( Propecia ) on human testicular steroidogenesis.We studied the testicular function and some androgen-mediated events in 22 males (16-30 years of age) with male pattern baldness that was treated with Finasteride ( Propecia
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ramipril generic ) (10 mg once daily) for 2 years. 0.4 /- 0.1 ng/ml) were significantly decreased. Fourteen subjects underwent gonadal stimulation with human chorionic gonadotropin (hCG), and the gonadotropin response
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to gonadotropin releasing hormone (GnRH) was determined in eight subjects, prior to and after 2 years of therapy.