Immunohistochemical Studies in Canine Prostatic Hyperplasia : Effect of Antiandrogen
スポンサーリンク
概要
- 論文の詳細を見る
To investigated spontaneous benign prostatic hyperplasia (BPH) in dog the effect of a synthetic steroidal antiandrogen, chlormadinone acetate (CMA) was studied. Old male beagle dogs (5-8 years old) were divided into following experimental groups: group 1 consisted of BPH controls; group 2 received CMA 0.3mg/kg/day p.o., for 6 months. In group 1 animals, glandular hyperplasia of the prostate was clearly detected. The glandular epithelial cells showed uniformly intense immunostaining for nuclear androgen receptors (AR). AR was also localized in the nuclei of the fibro-muscular cells. Immunoreactivity of 5α-reductase type I was positive in most glandular epithelial cells. The staining was positive in the cytoplasm but not in the nuclei. No fibro-muscular cells were stained. In contrast, CMA produced marked atrophy of the glandular epithelium. The interacinar fibro-muscular stroma was prominent. Furthermore, immunostaining of nuclear AR of both epithelial and stroma cells was remarkably decreased. The intensity of staining for 5α-reductase type I in most glandular epithelial cells also decreased. Interestingly, some basal cells exhibited positive staining for 5α-reductase type I. These results indicate that the uptake of testosterone and/or its androgenic effect on the prostate may be suppressed by CMA. We further speculate that the basal cells produce sufficient dihydrotestosterone to maintain themselves even in the presence of low testosterone levels.
- 東海大学の論文
著者
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Mikami T
Safety Research Department Teikoku Hormone Mfg. Co. Ltd.
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Tagawa Masashi
Safety Research Department Teikoku Hormone Mfg. Co. Ltd.
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NAKAYAMA Takaharu
Safety Res. Dept., Teikoku Hormone Mfg. Co., Ltd., of Kanagawa Pref.
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MURAKOSHI Masanori
Safety Research Department, Teikoku Hormone Mfg. Co., Ltd.
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Ikeda Rie
Safety Research Department Teikoku Hormone Mfg. Co. Ltd.
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Murakoshi M
(present Address)products Strategy Dcpartment Pharma Business Strategy Division Teikoku Hormone Mfg.
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Murakoshi Masanori
Safety Res. Dept. Teikoku Hormone Mfg Co. Ltd.
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Mikami T
Department Of Drug Safety Research Eisai Kawashima Research Laboratories Eisai Co. Ltd.
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Nakayama Takaharu
Medicinal Research Department Teikoku Hormone Mfg. Co. Ltd.
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Nakayama Takaharu
Safety Res. Dept. Teikoku Hormone Mfg. Co. Ltd. Of Kanagawa Pref.
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Natsume Tsugitaka
Teikoku Hormone Mig. Co. Ltd.
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Inada Rie
Safety Research Department Teikoku Hormone Mfg. Co. Ltd.
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Ikada Rie
Safety Research Department Teikoku Hormone Mfg. Co. Ltd.
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Nakayama T
Aska Pharmaceutical Co. Ltd. Research & Development Division
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