Aflatoxin B1 metabolism and DNA binding in isolated hepatocytes from rainbow trout (Salmo gairdneri)
- 1 January 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Carcinogenesis: Integrative Cancer Research
- Vol. 3 (5), 511-518
- https://doi.org/10.1093/carcin/3.5.511
Abstract
The World Health Organisation (WHO) has recently recommended the use of a simple in vitro test (Nitrosation Assay Procedure, NAP) to allow the ranking of orally administered drugs. It was suggested that the ranking of drugs should be carried out on a reactivity scale, according to their ability to nitrosate in the presence of high concentrations of nitrite at low pH (3–4). The present study was undertaken to investigate the effect of adding the concentration of nitrite recommended for the NAP Test (40 mM) to normal fasting human gastric juice. The data dearly demonstrate that such treatment results in the formation of derivatives with specific mutagenic activity for the bacterium Salmonella typhi-murium TA1537. This strain was recommended for use in the NAP Test. Although the NAP Test may be valid for its original purpose, in the absence of more physiologically relevant data it is invalid for use as a final arbiter in risk-benefit assessments. The possible formation of mutagenic species as a result of the nitrosation of natural gastric secretions should be considered when any risk-benefit assessment is made.This publication has 25 references indexed in Scilit:
- Metabolism of aflatoxin B1 in cultured mouse hepatocytes: Comparison with rat and effects of cyclohexene oxide and diethyl maleateToxicology and Applied Pharmacology, 1979
- Glutathione Depletion in Isolated Hepatocytes: Its Relation to Lipid Peroxidation and Cell DamageActa Pharmacologica et Toxicologica, 1979
- Genetic Differences in the Metabolic Activation of Benzo[a]Pyrene in MicePharmacology, 1979
- Gluconeogenesis by isolated hepatocytes from rainbow trout Salmo gairdneriComparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1979
- Aflatoxin B1 Induction of Hepatocellular Carcinoma in the Embryos of Rainbow Trout (Salmo gairdneri)234JNCI Journal of the National Cancer Institute, 1978
- A Correlation between Glutathione Levels and Cellular Damage in Isolated HepatocytesEuropean Journal of Biochemistry, 1977
- COMPARATIVE INVITRO METABOLISM OF AFLATOXICOL BY LIVER PREPARATIONS FROM ANIMALS AND HUMANS1977
- A fluorometric method for determination of oxidized and reduced glutathione in tissuesAnalytical Biochemistry, 1976
- A study of the conditions and mechanism of the diphenylamine reaction for the colorimetric estimation of deoxyribonucleic acidBiochemical Journal, 1956
- PROTEIN MEASUREMENT WITH THE FOLIN PHENOL REAGENTJournal of Biological Chemistry, 1951