Cyproterone Acetate: I. Microquantity Releasing Device of Cyproterone Acetate and its Failure in Inducing Functional Sterility in Male Rats*
- 1 March 1977
- journal article
- Published by Hindawi Limited in Andrologia
- Vol. 9 (1) , 70-73
- https://doi.org/10.1111/j.1439-0272.1977.tb01264.x
Abstract
Summary Prasad and his coworkers emphasized that microquantities of cyproterone acetate (CPA) when continuously available developed functional sterility in male rats by interfering the epididymal physiology. In our experimental rats either 2 or 3 capsules containing CPA as per the specification of Prasad were implanted subcutaneously and left for 300 and 250 days, respectively. Fertility test was made every month and it was observed that all the experimental animals were able to impregnate female rats throughout the experiment. Excepting the epididymis the weight of testes and other accessory glands did not differ from the controls in the animals which had 2 CPA capsules for 300 days. On the other hand, the animals which received 3 CPA capsules for 250 days showed significant reduction in weight of all the acessory glands including the testes. Zusammenfassung Prasad und Mitarbeiter haben ausdrücklich betont, daß kleinste Mengen von Cyproteronacetat bei kontinuierlicher Gabe eine funktionelle Sterilität bei männlichen Ratten bewirken können; dieser Prozeß soll über eine Beeinflussung der Physiologie des Nebenhodens gehen. Die Autoren haben versucht, diese Ergebnisse zu reproduzieren. In ihren Untersuchungen wurden entweder 2 oder 3 Cyproteronacetathaltige Kapseln (nach Angaben von Prasad et al.) subcutan eingepflanzt und dort für 300 bzw. 250 Tage belassen. Jeden Monat wurden Fertilitätstests vorgenommen; es zeigte sich, daß alle Versuchstiere in der Lage waren, während des gesamten Experimentes weibliche Ratten zu befruchten. Mit Ausnahme des Nebenhodens unterschied sich das Gewicht der Hoden und anderer accessorischer Drüsen bei den Tieren mit 2 Cyproteronacetatkapseln über 300 Tage nicht von den Kontrollgruppen. Andererseits zeigte sich bei den Tieren, die 3 Cyproteronacetatkapseln über 250 Tage erhalten hatten, eine signifikante Verringerung des Gewichtes aller accessorischer Drüsen einschließlich der Hoden.Keywords
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