Effect of eugenol on the genotoxicity of established mutagens in the liver

The influence of in vivo treatment with eugenol on established mutagens was studied to determine whether eugenol has antigenotoxic potential. The effects of eugenol in rats was investigated in the unscheduled DNA synthesis (UDS) assay with established mutagens and the Salmonella typhimurium mutagenicity assay. In addition, the effect of in vitro...

Safety evaluation of β-glucanase derived from Trichoderma reesei: Summary of toxicological data

Barlican, a β-glucanase enzyme obtained from Trichoderma reesei, was produced by a fermentation process and subjected to a series of toxicological tests to document its safety for use as a feed additive. The enzyme product was examined for general oral toxicity, inhalation toxicity, irritation to eye and skin, skin sensitization and mutagenic...

Zoönosen als volksgezond-heidprobleem [Zoonoses as a public health problem]

Zoonoses can be defined as infectious diseases that are transmitted from vertebrate animals to man under natural conditions. Applying this definition, a review is presented of zoonoses, occurring in the Netherlands. Data about this group of infectious diseases were collected from public health and veterinary data sources. From the results of the...

Influence of retinoids on the mutagenicity of cigarette-smoke condensate in Salmonella typhimurium TA98

The effects of 3 different retinoids (all-trans-retinol, all-trans-retinoic acid, and all-trans-retinyl acetate) on the mutagenic activity of cigarette-smoke condensate were investigated in Salmonella typhimurium TA98. Neither an enhancing nor an inhibitory effect of the retinoids on the mutagenicity of cigarette-smoke condensate was observed....

In vivo effects of toxic and detoxified endotoxin alone or in combination with muramyl dipeptide on lymphoid and non-lymphoid cells in the spleen of Meth A sarcoma-bearing mice

Chemicals/CAS: Acetylmuramyl-Alanyl-Isoglutamine, 53678-77-6; Acid Phosphatase, EC 3.1.3.2; Antigens, Surface; Antigens, Thy-1; carboxylesterase, EC 3.1.1.1; Carboxylic Ester Hydrolases, EC 3.1.1; Endotoxins; Immunoglobulins, Surface.

Mutagenicity of urine and faeces after treatment of rats with known genotoxins

Effects of amounts and type of agar on the number of spontaneous revertants in the Ames test

It has been shown that the spontaneous revertants in the Ames test can depend on the amount and type of bottom agar on the plates. The most clear-cut effect was found with his G46 strains, carrying the ??uvrB mutation, and with the new hisG428 strain, TA102. Evidence of mutagenic impurities in agar has been found. Chemicals/CAS: agar, 9002-18-0;...

Prophage induction and mutagenicity of a series of anti-tumour platinum(II) and platinum(IV) co-ordination complexes

Eleven platinum compounds with nitrogen donor ligands, previously tested for anti-tumour activity were studied for induction of prophage lambda and for mutagenicity in the Ames assay, with various strains of Salmonella. The compounds included cis and trans isomers of Pt(II) and Pt(IV) complexes and were tested with and without metabolic...

The mutagenicity of isoniazid in salmonella and its effects on DNA repair and synthesis in human fibroblasts

A commercial sample of the tuberculostatic drug isoniazid (INH) was found to have a weak mutagenic activity towards Salmonella typhimurium strains TA100 and TA1535. The addition of a rat or mouse liver homogenate to the test system decreased the mutagenic effect of INH. Hydrazine, an impurity of the INH sample, was also weakly mutagenic in...

The mutagenicity of isoniazid in salmonella and its effects on DNA repair and synthesis in human fibroblasts

Chemicals/CAS: hydrazine, 10217-52-4, 13775-80-9, 18500-32-8, 302-01-2, 7803-57-8; isoniazid, 54-85-3, 62229-51-0, 65979-32-0; manganese, 16397-91-4, 7439-96-5

Further studies on mobilization of CFUs

Mobilization of CFUs from haemopoietic tissues into circulation was studied after injection of different bacterial lipopolysaccharides (LPS), zymosan, phytohaemagglutinin (PHA), concanavalin A (Con A), trypsin and di-isopropyl-fluorophosphate-inhibited trypsin. All bacterial LPS used gave an increase of CFUs in the peripheral blood at 1 h after...

Effect of bacterial lipopolysaccharide on proliferation of CFU-S

Chemicals/CAS: Lipopolysaccharides

Mutagenicity screening: General principles and minimal criteria. Report of a committee of the European Environmental Mutagen Society

A statement of general principles and minimal criteria for the screening of chemicals for potential mutagenicity in man that may be used as guidelines for regulatory agencies and industrial organisations. To make clear the potentialities and current limitations of short-term mutagenicity testing for the prediction of genetic and carcinogenic...

Mutagenicity testing of urine from vinylchloride (VCM) treated rats using the salmonella test system

Chemicals/CAS: soybean oil, 8001-22-7; vinyl chloride, 75-01-4

Use of reagent-inpregnated ('Patho-Tec') test papers in the identification of enterobacteriaceae and similar bacteria

A comparative examination of Patho-Tec reagent-impregnated paper strips and the corresponding classical biochemical tests for the identification of Enterobacteriaceae was made. Patho-Tec papers appeared to be reliable for the cytochrome-oxidase and phenylalanine-deaminase tests. The urease test papers gave false negative reactions in Citrobacter...