Immunochemical and catalytic characterization of hepatic microsomal cytochrome P450 in the sperm whale (Physeter macrocephalus)
| Autor: | Anders Goksøyr, Jan P. Boon, Wilma E Lewis |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
Insecticides Chromatography Gas CYP3A Health Toxicology and Mutagenesis Blotting Western Aquatic Science Catalysis Mixed Function Oxygenases Toxaphene chemistry.chemical_compound Cytochrome P-450 Enzyme System Biotransformation Cytochrome P-450 CYP1A2 Sperm whale Cytochrome P-450 CYP3A Cytochrome P-450 CYP1A1 Animals Cells Cultured biology Whales Cytochrome P450 Oxidoreductases N-Demethylating Anatomy biology.organism_classification Sperm Models Chemical Biochemistry chemistry Microsomes Liver Microsome biology.protein Aryl Hydrocarbon Hydroxylases Cytochrome P-450 CYP4A |
| Zdroj: | Aquatic Toxicology. 52:297-309 |
| ISSN: | 0166-445X |
| DOI: | 10.1016/s0166-445x(00)00165-x |
| Popis: | Liver samples from three live-stranded adult male sperm whales, that could be sampled and frozen in liquid nitrogen within 18 h post mortem, provided an opportunity to learn more about the basic properties of their cytochrome P450 (CYP) system. All samples were catalytically active and showed sharp bands of the different CYP enzymes after Western blotting, indicating that degradation of the proteins was negligible. All three sperm whales showed a similar immunochemical CYP pattern: bands of CYP1A1/2, CYP3A and CYP4A were present, but CYP2B1/2 was not detected. Significant biotransformation of the polychlorinated aromatic hydrocarbons 4, 4'-dichlorobiphenyl (CB-15), 2,7-dichlorodibenzodioxin and 1,2,3,4,8-pentadibenzofuran was measured in an in vitro biotransformation assay. In contrast, 3,3',4,4'-tetrachlorobiphenyl (CB-77) and two chlorobornanes (CHB-32 and CHB-62) occurring in the insectide toxaphene(R), were not metabolised. |
| Databáze: | OpenAIRE |
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