Mammary tumor inhibiting effect of 3,3'-diacetoxy-alpha, beta-dialkylstilbenes and of related stilbene oxides.
3,3'-Diacetoxy-alpha, beta-dialkylstilbenes (alkyl = CH3 to C4H9, 1-4) 3,3'-dihydroxy-alpha, beta-diethylstilbene (5), and their corresponding stilbene oxides (6-10) were synthesized. Compounds 1-10 competitively antagonized in vitro the interaction of [3H]estradiol with its receptor. 3,3'-Diacetoxy-alpha, beta-diethylstilbene (2), 3,3'-diacetoxy-alpha, beta-diethylstilbene oxide (7), and their phenolic analogues (5 and 10) were most effective. Shortening or lengthening the alkyl side chains led to a decrease in receptor affinity. Among the stilbenes and epoxides, those with C2H5 and C3H7 groups (2, 3, 5 and 7, 8, 10) caused the strongest inhibition of the growth of a hormone-dependent postmenopausal human mammary carcinoma serially implanted in nude mice. The strong antitumor activity of 5 and 10 was confirmed by experiments on the 9,10-dimethyl-1,2-benzanthracene-induced, hormone-dependent mammary carcinoma of the Sprague-Dawley rat.
D000477:Alkylating Agents / Q000138:chemical synthesis; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis*; D002417:Cattle; D055598:Chemical Phenomena; D002621:Chemistry; D005260:Female; D066298:In Vitro Techniques; D008297:Male; D008325:Mammary Neoplasms, Experimental / Q000188:drug therapy*; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D051381:Rats; D011919:Rats, Inbred Strains; D011960:Receptors, Estrogen / Q000187:drug effects; D011980:Receptors, Progesterone / Q000187:drug effects; D013267:Stilbenes / Q000138:chemical synthesis* / Q000494:pharmacology; D014590:Uterine Contraction / Q000187:drug effects; D014599:Uterus / Q000254:growth & development
D000477:Alkylating Agents; D000970:Antineoplastic Agents; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D013267:Stilbenes