Abstract
The presence of multiple forms of the cytochrome P450 was demonstrated enzymatically in camel tissues using a variety of isoenzyme specific substrates and immunochemically using isoenzyme specific antibodies. The maximum catalytic activity using xenobiotics as substrate was observed in the liver followed by the kidney. However, lauric acid hydroxylation was found to be higher in the kidney than in any other tissues. Camel liver microsomal monooxygenase activity using aniline, aminopyrene, ethoxycoumarin, ethoxyresorufin and benzo(a)pyrene as substrates was comparable with those of rat and human livers. The activity of the enzymes in extrahepatic tissues of the camel was comparable with those of the rat extrahepatic tissues. The maximum expression of P450 protein was seen in the camel liver and kidney while the brain and intestine exhibited relatively low levels of expression. P450 expression in camel tissues appeared to be higher than in rat tissues. Immunohistochemical staining of P450 in the camel liver, kidney and brain confirmed the higher expression of P450 enzyme proteins in the liver and kidney as compared to other extrahepatic tissues. The maximum expression of P450 in the liver was observed in hepatocytes around the central vein and in the kidney it was observed in the proximal tubules. These results demonstrate that the multiple forms of P450s are differentially expressed in camel tissues and that the relative levels of expression are comparable with those of rat and human tissues. These observations may be important in understanding the differential susceptibility of camel tissues to the toxic/therapeutic effects of xenobiotics/drugs and environmental pollution.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Comparative Biochemistry and Physiology. Part C: Comparative Pharmacology and Toxicology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
