title: 2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone (BHT quinone methide): an active metabolite of BHT causing haemorrhages in rats.
abstract: Male Sprague-Dawley rats and male ICR mice, species respectively susceptible and resistant to the haemorrhagic effect of butylated hydroxytoluene (BHT), were administered BHT quinone methide (2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone) orally; 24 or 48 h later the plasma concentrations of blood coagulation factors II (prothrombin), VII, IX and X were determined. BHT quinone methide caused a decrease in factors II, VII, IX and X in a dose-dependent manner after 48 h, while a similar dose of BHT did not. Haemorrhages in epididymis or thymus were found in BHT quinone methide-treated rats. These findings may support the belief that BHT quinone methide is an active metabolite which disturbs the vitamin K redox cycle in BHT-induced haemorrhage.
authors.affiliation: Department of Toxicology, Tokyo Metropolitan Research Laboratory of Public Health, Japan.
authors.forename: O
authors.initials: O
authors.lastname: Takahashi
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004822:Epididymis / Q000187:drug effects; D006470:Hemorrhage / Q000139:chemically induced*; D008297:Male; D051379:Mice; D011809:Quinones / Q000633:toxicity*; D051381:Rats; D011919:Rats, Inbred Strains; D013950:Thymus Gland / Q000187:drug effects
chemical_list: D011809:Quinones; C024709:2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone