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Toxicology and Genetic Toxicology in the New Era of “Toxicogenomics”: Impact of “-omics” Technologies

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Toxicogenomics

Abstract

The unprecedented advances in molecular biology during the last two decades have resulted in a dramatic increase in knowledge about gene structure and function, an immense database of genetic sequence information, and an impressive set of efficient new technologies for monitoring genetic sequences, genetic variation, and global functional gene expression. These advances have led to a new sub-discipline of toxicology: “toxicogenomics”. We define toxicogenomics as “the study of the relationship between the structure and activity of the genome (the cellular complement of genes) and the adverse biological effects of exogenous agents.” This broad definition encompasses most of the variations in the current usage of this term, and in its broadest sense includes studies of the cellular products controlled by the genome (messenger RNAs, proteins, metabolites, etc.). The new “global” methods of measuring families of cellular molecules, such as RNA, proteins, and intermediary metabolites have been termed “-omic” technologies, based on their ability to characterize all, or most, members of a family of molecules in a single analysis. With these new tools, we can now obtain complete assessments of the functional activity of biochemical pathways, and of the structural genetic (sequence) differences among individuals and species, that were previously unattainable. These powerful new methods of high-throughput and multi-endpoint analysis, include gene expression arrays that will soon permit the simultaneous measurement of the expression of all human genes on a single “chip”. Likewise, there are powerful new methods for protein analysis (proteomics: the study of the complement of proteins in the cell) and for analysis of cellular small molecules (metabonomics: the study of the cellular This article has been reproduced from Mutation Research, Vol 499, 2002, pp 13–25, Aardema & MacGregor, by the permission of Elsevier Science, Ltd. metabolites formed and degraded under genetic control). This will likely be extended in the near future to other important classes of biomolecules such as lipids, carbohydrates, etc. These assays provide a general capability for global assessment of many classes of cellular molecules, providing new approaches to assessing functional cellular alterations. These new methods have already facilitated significant advances in our understanding of the molecular responses to cell and tissue damage, and of perturbations in functional cellular systems.

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Authors and Affiliations

  1. The Procter & Gamble Co. Miami Valley Laboratories, P.O. Box 538707, Cincinnati, OH, 45252, USA

    Marilyn J. Aardema

  2. U.S. Food and Drug Administration, National Center for Toxicological Research, 5600 Fishers Lane, Rockville, MD, 20857, USA

    James T. MacGregor

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  1. Marilyn J. Aardema
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Editors and Affiliations

  1. Center for Biological Safety and Research, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan

    Tohru Inoue M.D., Ph.D. (Director) (Director)

  2. Molecular and Investigative Toxicology, Drug Safety Evaluation, Pfizer PGRD, Groton, Connecticut, USA

    William D. Pennie Ph.D. (Director) (Director)

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Aardema, M.J., MacGregor, J.T. (2003). Toxicology and Genetic Toxicology in the New Era of “Toxicogenomics”: Impact of “-omics” Technologies. In: Inoue, T., Pennie, W.D. (eds) Toxicogenomics. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66999-9_22

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  • DOI: https://doi.org/10.1007/978-4-431-66999-9_22

  • Publisher Name: Springer, Tokyo

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