Biomarkers for the 21st century: listening to the microbiome

Toxicological Sciences : an Official Journal of the Society of Toxicology
Rodney Reynolds Dietert, Ellen Kovner Silbergeld

Abstract

The field of environmental research has benefited greatly from the concept of biomarkers, which originally expanded our thinking by opening the "black box" between environmental exposures and manifestations of disease and dysfunction in exposed populations, as laid out in a highly influential article published in 1987 by an expert committee convened by the National Research Council. Advances in biomedical research now challenge us to revise this concept to include the microbiome as a critical stage in the progression from exposure to outcome. Incorporating the microbiome into the basic 1987 model can spur new advances and understanding in environmental health. The human microbiome as a whole comprises the majority of cells and genes of the super-organism (host and microbiome). Site-specific microbiomes are the first to encounter xenobiotics, prior to absorption across gut, skin, or respiratory system. A growing literature indicates that these microbial communities may participate in biotransformation and thus constitute a compartment to add to the original biomarker schematic. In addition, these microbiomes interact with the "niche" in which they are located and thus transduce responses to and from the host organism. Incorporat...Continue Reading

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