title: [Acute or subacute toxicity of 2,3,4,7,8-pentachlorodibenzofuran and 1,2,3,4,7,8-hexachlorodibenzofuran to rats in non-lethal dose].
abstract: Two isomers of polychlorinated dibenzofurans, 2,3,4,7,8-pentachlorodibenzofuran or 1,2,3,4,7,8-hexachlorodibenzofuran, both of which are present in the yusho patients, were subcutaneously administered to rats in a single non-lethal dose to examine acute or subacute toxicity. Maximal inhibition of increase in body weight and decrease in daily locomotor activity were observed in the rats treated with 370 micrograms/kg of these compounds at 3 to 4 weeks after treatment, especially with 2,3,4,7,8-pentachlorodibenzofuran. Histopathologically, hypertrophy of the liver and atrophy of the thymus were noted at 4 weeks after treatment with this dose, while bile duct hyperplasia in the liver was observed at 40 weeks after treatment with 250 micrograms/kg of these compounds.
authors.forename: M
authors.initials: M
authors.lastname: Nishizumi
mesh_terms: D000818:Animals; D001572:Benzofurans / Q000008:administration & dosage / Q000633:toxicity*; D001835:Body Weight / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D008099:Liver / Q000187:drug effects*; D008297:Male; D009043:Motor Activity / Q000187:drug effects*; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors
chemical_list: D001572:Benzofurans; C051412:1,2,3,4,7,8-hexachlorodibenzofuran; C038890:2,3,4,7,8-pentachlorodibenzofuran