Entwicklung neuer Antiöstrogene vom Typ des 3,3′-Dihydroxy-α,β-diäthylstilbens und ihre Prüfung am DMBA-induzierten, hormonabhängigen Mammacarcinom der SD-Ratte
- 1 June 1980
- journal article
- research article
- Published by Springer Nature in Zeitschrift für Krebsforschung und Klinische Onkologie
- Vol. 97 (2), 167-186
- https://doi.org/10.1007/bf00409903
Abstract
Die Verlagerung der phenolischen OH-Gruppen des Diäthylstilböstrols in die 3,3′-position (trans-3,3′-Dihydroxy-α,β-diäthylstilben, Verb. Nr. III) führt unter Erhaltung der Rezeptoraffinität zu einer starken Abnhme der östrogenen Wirkung. III hemmt in vitro die östradiol-Rezeptor-Wechselbeziehung kompetitiv und antagonisiert in vivo bei der Maus die uterotrope Wirkung des Östrons. In Versuchen am DMBA-induzierten, hormonabhängigen Mammacarcinom der Ratte kommt es, unter III-Einwirkung dosisabhägig zu einer starken Abnahme von Tumorgröße und-zahl, die durch die antiöstrogenen Eigenschaften von III bedingt, ist. Der Austausch der α,β-ständigen Äthylreste in III durch andere Alkylketten führt zu keiner weiteren, Steigerung der antiöstrogenen und tumorhemmenden, Wirkung. The displacement of the phenolic OH-group of diethylstilbestrol into the 3,3′-position (trans-3,3′-dihydroxy-α,β-diethylstilbene compd. III) leads to a strong decrease of the estrogenic effect under conservation of the receptor affinity. In vitro, III inhibits the estradiol-receptor-interaction competitively and, in vivo, antagonises the uterotropic effect of estrone in the mouse. In tests with the DMBA-induced, hormone-dependent mammary carcinoma of the rat a dose-dependent strong decrease of tumor size and yield is achieved under the influence of III, due to the antiestrogenic, properties of III. The replacement of the α,β-bound ethyl groups in III by other alkyl chains leads to no further increase of the antiestrogenic and antitumor activity.Keywords
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