Abstract
Alcohol abuse leads to tissue damage including a variety of cancers; however, the molecular mechanisms by which this damage occurs remain to be fully understood. The primary enzymes involved in ethanol metabolism include alcohol dehydrogenase (ADH), cytochrome P450 isoform 2E1, (CYP2E1), catalase (CAT), and aldehyde dehydrogenases (ALDH). Genetic polymorphisms in human genes encoding these enzymes are associated with increased risks of alcohol-related tissue damage, as well as differences in alcohol consumption and dependence. Oxidative stress resulting from ethanol oxidation is one established pathogenic event in alcohol-induced toxicity. Ethanol metabolism generates free radicals, such as reactive oxygen species (ROS) and reactive nitrogen species (RNS), and has been associated with diminished glutathione (GSH) levels as well as changes in other antioxidant mechanisms. In addition, the formation of protein and DNA adducts associated with the accumulation of ethanol-derived aldehydes can adversely affect critical biological functions and thereby promote cellular and tissue pathology. Animal models have proven to be valuable tools for investigating mechanisms underlying pathogenesis caused by alcohol. In this review, we provide a brief discussion on several animal models with genetic defects in alcohol-metabolizing enzymes and GSH-synthesizing enzymes and their relevance to alcohol research.
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Acknowledgements
This work was supported in part by the National Institutes of Health Grants No. R24AA022057, No. R01EY14390, No. T32AA007464, CA148828, and DK095201.
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Heit, C., Dong, H., Chen, Y., Shah, Y.M., Thompson, D.C., Vasiliou, V. (2015). Transgenic Mouse Models for Alcohol Metabolism, Toxicity, and Cancer. In: Vasiliou, V., Zakhari, S., Seitz, H., Hoek, J. (eds) Biological Basis of Alcohol-Induced Cancer. Advances in Experimental Medicine and Biology, vol 815. Springer, Cham. https://doi.org/10.1007/978-3-319-09614-8_22
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DOI: https://doi.org/10.1007/978-3-319-09614-8_22
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