Liver lipid peroxidation-related parameters after short-term administration of hexachlorocyclohexane isomers to rats
| Autor: | K Simizu, Silvia Berlanga de Moraes Barros, Virgínia Berlanga Campos Junqueira |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Thiobarbituric acid Glutathione reductase Glucosephosphate Dehydrogenase Toxicology Lipid peroxidation Superoxide dismutase chemistry.chemical_compound Cytochrome P-450 Enzyme System Internal medicine medicine Animals chemistry.chemical_classification Glutathione Peroxidase biology Chemistry Superoxide Glutathione peroxidase Rats Inbred Strains Stereoisomerism General Medicine Thiobarbiturates Rats Glutathione Reductase Endocrinology Liver Biochemistry Enzyme Induction Toxicity Microsomes Liver Microsome biology.protein Lipid Peroxidation Hexachlorocyclohexane |
| Zdroj: | Toxicology Letters. 56:137-144 |
| ISSN: | 0378-4274 |
| DOI: | 10.1016/0378-4274(91)90099-r |
| Popis: | Rats treated with diets containing 20 ppm of alpha- or gamma-hexachlorocyclohexane (HCH) for 15 or 30 days showed increased levels of liver cytochrome P-450 followed by increased production of both thiobarbituric acid reactants by liver homogenates and microsomes and superoxide anion production by liver microsomes. In these animals superoxide dismutase (SOD) activity was also increased. In consequence, the ratio between SOD activity and microsomal superoxide radical (O2-.) production showed a slight increase after 15 days of treatment. However, after 30 days, there was a tendency for this ratio to decrease. Other parameters studied were liver glucose-6-phosphate dehydrogenase, glutathione peroxidase, glutathione reductase and catalase (CAT) activities. Among them, only CAT activity showed a 26% and 38% increase after 15 or 30 days of treatment with the alpha-isomer. It is suggested that when lipid peroxidation is involved in the mechanism of toxicity of a xenobiotic, this parameter can be used to determine the no-observed-effect level. |
| Databáze: | OpenAIRE |
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