title: Thirteen-week toxicity study of d-alpha-tocopheryl acetate (vitamin E) in Fischer 344 rats.
abstract: A 13-wk study was conducted by administering d-alpha-tocopheryl acetate (vitamin E) in corn oil by gavage to groups of ten male and ten female Fischer 344 rats at doses of 0, 125, 500 or 2000 mg/kg body weight daily for 13 wk. The dose of corn oil given was 3.5 ml/kg. Additional groups of ten males and ten females were included and served as untreated controls. Deaths occurred only in males at 2000 mg/kg. Vitamin E dosing had no effect on body weight or food consumption. The liver-to-body weight ratio of females at 2000 mg/kg was significantly increased. In males, high levels of vitamin E (2000 mg/kg) caused prolongation of both prothrombin and activated partial thromboplastin (APTT) times, reticulocytosis and a decrease in haematocrit values and haemoglobin concentrations. APTT was also lengthened in females at this dose level. High levels (2000 mg/kg) caused haemorrhagic diathesis in both males and females and increased medullary erythropoiesis in the spleen of one male. Vitamin E at all doses tested caused interstitial inflammation and adenomatous hyperplasia of the lung. The above findings indicate that vitamin E administration in excessive amounts is potentially toxic.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001769:Blood / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D005260:Female; D008171:Lung Diseases / Q000139:chemically induced / Q000473:pathology; D008297:Male; D009929:Organ Size / Q000187:drug effects; D051381:Rats; D011916:Rats, Inbred F344; D014810:Vitamin E / Q000633:toxicity*
chemical_list: D014810:Vitamin E