Chapter 41

The Mitochondrial Exposome

Douglas I. Walker

Douglas I. Walker

Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, Emory University, Atlanta, GA, USA

Department of Civil and Environmental Engineering, Tufts University, Medford, MA, USA

HERCULES Exposome Research Center, Department of Environmental Health, Rollins School of Public Health, Atlanta, GA, USA

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Kurt D. Pennell

Kurt D. Pennell

Department of Civil and Environmental Engineering, Tufts University, Medford, MA, USA

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Dean P. Jones

Dean P. Jones

Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, Emory University, Atlanta, GA, USA

HERCULES Exposome Research Center, Department of Environmental Health, Rollins School of Public Health, Atlanta, GA, USA

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First published: 23 February 2018

Summary

The human exposome is typically defined in terms of systemic exposures, with the goal of developing tools and techniques for measuring exposures for an individual. Phenotyping of the mitochondrial exposome can be used for hazard identification by surveying populations for the occurrence of exposures, and prevalence can be used to prioritize toxicity. Mitochondria are recognized as secondary toxicological targets for many common environmental pollutants, including naturally occurring exogenous chemicals, environmental chemicals, and pharmaceuticals. High-throughput screening (HTS) assays for testing mitochondrial toxicity enable screening and prioritization of a large number of environmental pollutants. High-resolution metabolomics (HRM) of the mitochondria isolates was performed using liquid chromatography with high-resolution mass spectrometry (HRMS). Applying HRM to study isolated human mitochondria has the potential to provide new insight into the chemical burden arising from exposure to environmental chemicals and to identify potential toxicological targets.

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