Cited by 678Gut microbiota and healthMicrobial bioremediation and biosurfactantsHealth, Environment, Cognitive Aging

The gut microbiota: a major player in the toxicity of environmental pollutants?

Open access
Claus, Sandrine P, Guillou, Hervé, Ellero-Simatos, Sandrine·2016·npj Biofilms and Microbiomes

Abstract

Exposure to environmental chemicals has been linked to various health disorders, including obesity, type 2 diabetes, cancer and dysregulation of the immune and reproductive systems, whereas the gastrointestinal microbiota critically contributes to a variety of host metabolic and immune functions. We aimed to evaluate the bidirectional relationship between gut bacteria and environmental pollutants and to assess the toxicological relevance of the bacteria-xenobiotic interplay for the host. We examined studies using isolated bacteria, faecal or caecal suspensions-germ-free or antibiotic-treated animals-as well as animals reassociated with a microbiota exposed to environmental chemicals. The literature indicates that gut microbes have an extensive capacity to metabolise environmental chemicals that can be classified in five core enzymatic families (azoreductases, nitroreductases, β-glucuronidases, sulfatases and β-lyases) unequivocally involved in the metabolism of >30 environmental contaminants. There is clear evidence that bacteria-dependent metabolism of pollutants modulates the toxicity for the host. Conversely, environmental contaminants from various chemical families have been shown to alter the composition and/or the metabolic activity of the gastrointestinal bacteria, which may be an important factor contributing to shape an individual's microbiotype. The physiological consequences of these alterations have not been studied in details but pollutant-induced alterations of the gut bacteria are likely to contribute to their toxicity. In conclusion, there is a body of evidence suggesting that gut microbiota are a major, yet underestimated element that must be considered to fully evaluate the toxicity of environmental contaminants.

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  • The capacity of the gut microbiome to metabolize environmental chemicals is mediated by widely distributed enzymes such as beta-glucuronidases, azoreductases, and nitroreductases.

    “The capacity of the gut microbiome to metabolize environmental chemicals is mediated by enzymes with a wide distribution such as b-glucoronidases, azoreductases, and nitroreductases, which are able to chemically transform a range of agents such as nitrotoluenes, pesticides, polychlorobiphenyls, azo dyes, and metals (Claus et al., 2016).”

    From Gut reactions: Breaking down xenobiotic–microbiome interactions (2019) · cites this paper as Claus et al., 2016

  • Gut microbial enzymes can chemically transform nitrotoluenes, pesticides, polychlorobiphenyls, azo dyes, and metals.

    “The capacity of the gut microbiome to metabolize environmental chemicals is mediated by enzymes with a wide distribution such as b-glucoronidases, azoreductases, and nitroreductases, which are able to chemically transform a range of agents such as nitrotoluenes, pesticides, polychlorobiphenyls, azo dyes, and metals (Claus et al., 2016).”

    From Gut reactions: Breaking down xenobiotic–microbiome interactions (2019) · cites this paper as Claus et al., 2016

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Research works printed but not linked: 2

  1. Letcher, R. J., Klasson-Wehler, E. & Bergman, A. in New Types of Persistent Halogenated Compounds (ed. Paasivirta J.) 315–359 (Springer-Verlag, 2000).
  2. Rowland, I. R. in Role of the Gut Flora in Toxicity and Cancer (ed. Rowland, I. R.) 207–226 (Academic Press, 1988).

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Authors
Claus, S. P., Guillou, H., & Ellero-Simatos, S.
Affiliations
  • University of Reading (GB)
  • Toxicologie Alimentaire (FR)
Venue
npj Biofilms and Microbiomes
Published
2016-05-04
Volume
2
Issue
1
Pages
16003-16003
ISSN
2055-5008 (ISSN-L)
OpenAlex
W2345411160
Cited by
678
References
110
Citations by year
2026: 54 · 2025: 69 · 2024: 80 · 2023: 63 · 2022: 84 · 2021: 94 · 2020: 90 · 2019: 56 · 2018: 54 · 2017: 31 · 2016: 3
FWCI
4.34
Type
journal article
Language
en
Update notices
erratum (2017-06-22)
Open access
Locations
  • npj Biofilms and Microbiomes (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • CentAUR (University of Reading) (acceptedVersion)
  • HAL (submittedVersion, other-oa)
Funders
  • European Commission
  • Institut National de la Recherche Agronomique
  • Conseil Régional Midi-Pyrénées
  • Medical Research Council (MR/M004945/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Health, Environment, Cognitive Aging
Keywords
gut microbiota, environmental pollutants, xenobiotic metabolism, azoreductase, nitroreductase, beta-glucuronidase, sulfatase, beta-lyase, host toxicity, germ-free animals, cecal microbiota

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