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Cytochrome P450 system as potential biomarkers of certain toxicants: comparison between plant and animal models

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Abstract

In present study, we measured the activities of some selected cytochrome P450 isozymes like ethoxyresorufin-o-deethylase (EROD), pentoxyresorufin-o-deethylase (PROD), and N-nitrosodimethylamine demethylase (NDMA-d) treating experimental rats with different environmental toxicants, namely trichloroethylene (TCE), heavy metal mixture, and ethyl alcohol individually or in combination and by exposing the Allium cepa bulbs to increasing concentration of TCE for 48 h. In animal system, NDMA-d activity displayed a remarkable amplification by 4.2-fold in the liver of alcohol ingested rats compared with control animals. TCE intake also resulted in a marked increase of around 3.8-fold and 1.2-fold in rats’ NDMA-d activity in the liver and kidney, respectively. In onion bulbs, an amazing rise in the activity of test enzymes was recorded in a dose-dependent manner. Among the said enzymes, PROD showed maximum increase up to the extent of 22-fold in comparison with control at 20 ppm of TCE exposure, whereas NDMA-d and EROD showed 11- and 9-fold increase in enzymatic activity, respectively, compared with the control. Based on this study, we conclude and advocate that all the selected isozymes of CYP450 system, viz. PROD, NDMA-d, and EROD can act as potent biomarkers in plant system for assessing the TCE pollution.

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Acknowledgments

The authors gratefully acknowledge the research facility provided by KFMRC, King Abdulaziz University, Jeddah, Saudi Arabia and Aligarh Muslim University, Aligarh, India.

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The authors declare that there are no conflicts of interest.

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Correspondence to Masood Ahmad.

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Tabrez, S., Ahmad, M. Cytochrome P450 system as potential biomarkers of certain toxicants: comparison between plant and animal models. Environ Monit Assess 185, 2977–2987 (2013). https://doi.org/10.1007/s10661-012-2765-z

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