title: The differential clastogenicity of Solvent Yellow 14 and FD & C Yellow No. 6 in vivo in the rodent micronucleus test (observations on species and tissue specificity).
abstract: Solvent Yellow 14 is carcinogenic in rats, inducing neoplastic nodules of the liver, but is non-carcinogenic in mice. The present paper shows that Solvent Yellow 14 induces micronuclei in the bone marrow of rats after a single oral dose of 250 mg/kg and above. In mice, however, there was no increased incidence of micronuclei after single oral doses of up to 2000 mg/kg Solvent Yellow 14, thus reflecting the species specific carcinogenic effect of the compound. The structurally related azo dye FD & C Yellow No. 6 is noncarcinogenic to rats and mice and gave a negative result in both rat and mouse bone marrow micronucleus tests after a single oral dose of up to 2000 mg/kg. The rat bone marrow micronucleus test is therefore capable of discrimination between the carcinogenic and the non-carcinogenic azo dye. A negative result was obtained for Solvent Yellow 14 in an in vivo liver unscheduled DNA synthesis assay after oral doses up to 1000 mg/kg. This result demonstrates the inability of the two in vivo assays used to predict target organ specificity seen in the cancer bioassay.
authors.affiliation: Genetic and Reproductive Toxicology Department, Glaxo Group Research Ltd, Herts, UK.
authors.forename: C
authors.initials: C
authors.lastname: Westmoreland
authors.forename: D G
authors.initials: DG
authors.lastname: Gatehouse
mesh_terms: D000818:Animals; D001391:Azo Compounds / Q000633:toxicity*; D001853:Bone Marrow; D008099:Liver; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D015162:Micronucleus Tests; D009284:Naphthols / Q000633:toxicity*; D009928:Organ Specificity; D051381:Rats; D011919:Rats, Inbred Strains; D013045:Species Specificity
chemical_list: D001391:Azo Compounds; D009284:Naphthols; C024336:1-phenylazo-2-naphthol; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt