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Concentration Effect of Estrogen Receptor-${\alpha}$ Selective Agonist on the Morphology of Reproductive Organs of the Male Mice  

Han, Ji-Yeon (Department of Biology, College of Bio-industry Science, Sunchon National University)
Cho, Young-Kuk (Department of Clinical Pathology, Seokang University)
Cho, Hyun-Wook (Department of Biology, College of Bio-industry Science, Sunchon National University)
Publication Information
Applied Microscopy / v.41, no.1, 2011 , pp. 37-45 More about this Journal
Abstract
Known as a female hormone, estrogen, has an effect on the male reproductive organs. The estrogen has to combine with the estrogen receptor to communicate a signal. Propyl pyrazole triol (PPT) is an estrogen receptor alpha selective agonist with a 410-, or 1,000-fold relative binding affinity for estrogen receptor alpha versus estrogen receptor beta. In this study, adult male mice were treated weekly with subcutaneously injections of PPT (0.01 mg, 0.1 mg, 1mg and 4 mg) suspended in castor oil (as control) for 8 weeks and observed histologically changes in testis, efferent ductule and epididymis. In the high concentrations of PPT 4 mg treatment group, a remarkable reduction was observed in the weight of the body, testis and epididymis. Microscopic examination revealed a reduction in seminiferous tubular diameter of the testis, and epithelial cell height of the epididymis in treated group during the experiment. In addition, as the diameter of the efferent ductule increased gradually, the height of epithelial cells was decreased. PPT 4 mg treatment group caused inhibition of spermatogenesis due to atrophied germinal epithelium in the testis, and decrease of adipocyte size attached to the epididymis. Sperm was not observed in the caudal epididymis of PPT 4 mg treated group. In conclusion, the injection of high concentrations of PPT into adult male mice induced physiological changes, such as an inhibition of spermatogenesis, and also histological changes within the reproductive organs.
Keywords
Estrogen receptor agonist; Testis; Efferent ductule; Epididymis; Fertility; Mouse;
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