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- W2156836019 abstract "Chlormadinone acetate and finasteride are androgen suppressive agents clinically used for benign prostatic hyperplasia but their mechanism for inducing prostatic atrophy differs. We investigated the effect of these androgen suppressive agents on prostatic histology and apoptosis using the spontaneous canine benign prostatic hyperplasia model.Animals were treated with oral chlormadinone acetate or finasteride for 25 weeks. The prostatic volumes were analyzed every 5 weeks. Prostatic androgen and estrogen concentrations, histological composition and apoptosis were determined at the end of treatment. Apoptosis was measured by in situ labeling of 3' hydroxy ends of the DNA breaks using the terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labeling method.There was a similar volume reduction effect with 0.3 mg./kg. chlormadinone acetate daily and 1 mg./kg. finasteride daily. Chlormadinone acetate decreased testosterone and dihydrotestosterone but finasteride decreased only dihydrotestosterone in the prostate gland. The concentration ratio of estradiol-to-total androgen in the prostate was significantly increased in finasteride treated canines. Chlormadinone acetate and finasteride decreased the epithelial and stromal components. The extent of apoptosis observed in the prostate was significantly higher in the chlormadinone acetate group compared to that of the control and finasteride groups.Although a similar effect of chlormadinone acetate and finasteride was observed in the induction of prostatic regression and composition of the histological components, the sustained increase in apoptosis was observed only in chlormadinone acetate treated canines. We suggest that different intraprostatic endocrine environments created by chlormadinone acetate or finasteride, which have different intraprostatic testosterone levels and estradiol-to-androgen ratios, may be responsible for the different outcomes in the extent of apoptosis." @default.
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- W2156836019 date "2001-01-01" @default.
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- W2156836019 title "COMPARISON OF HISTOLOGICAL COMPOSITIONS AND APOPTOSIS IN CANINE SPONTANEOUS BENIGN PROSTATIC HYPERPLASIA TREATED WITH ANDROGEN SUPPRESSIVE AGENTS CHLORMADINONE ACETATE AND FINASTERIDE" @default.
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- W2156836019 doi "https://doi.org/10.1097/00005392-200101000-00081" @default.
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