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Alcohol Induced Alterations to the Human Fecal VOC Metabolome

Author

Listed:
  • Robin D Couch
  • Allyson Dailey
  • Fatima Zaidi
  • Karl Navarro
  • Christopher B Forsyth
  • Ece Mutlu
  • Phillip A Engen
  • Ali Keshavarzian

Abstract

Studies have shown that excessive alcohol consumption impacts the intestinal microbiota composition, causing disruption of homeostasis (dysbiosis). However, this observed change is not indicative of the dysbiotic intestinal microbiota function that could result in the production of injurious and toxic products. Thus, knowledge of the effects of alcohol on the intestinal microbiota function and their metabolites is warranted, in order to better understand the role of the intestinal microbiota in alcohol associated organ failure. Here, we report the results of a differential metabolomic analysis comparing volatile organic compounds (VOC) detected in the stool of alcoholics and non-alcoholic healthy controls. We performed the analysis with fecal samples collected after passage as well as with samples collected directly from the sigmoid lumen. Regardless of the approach to fecal collection, we found a stool VOC metabolomic signature in alcoholics that is different from healthy controls. The most notable metabolite alterations in the alcoholic samples include: (1) an elevation in the oxidative stress biomarker tetradecane; (2) a decrease in five fatty alcohols with anti-oxidant property; (3) a decrease in the short chain fatty acids propionate and isobutyrate, important in maintaining intestinal epithelial cell health and barrier integrity; (4) a decrease in alcohol consumption natural suppressant caryophyllene; (5) a decrease in natural product and hepatic steatosis attenuator camphene; and (6) decreased dimethyl disulfide and dimethyl trisulfide, microbial products of decomposition. Our results showed that intestinal microbiota function is altered in alcoholics which might promote alcohol associated pathologies.

Suggested Citation

  • Robin D Couch & Allyson Dailey & Fatima Zaidi & Karl Navarro & Christopher B Forsyth & Ece Mutlu & Phillip A Engen & Ali Keshavarzian, 2015. "Alcohol Induced Alterations to the Human Fecal VOC Metabolome," PLOS ONE, Public Library of Science, vol. 10(3), pages 1-24, March.
    • Handle: RePEc:plo:pone00:0119362
    DOI: 10.1371/journal.pone.0119362
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    References listed on IDEAS

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    1. Lawrence A. David & Corinne F. Maurice & Rachel N. Carmody & David B. Gootenberg & Julie E. Button & Benjamin E. Wolfe & Alisha V. Ling & A. Sloan Devlin & Yug Varma & Michael A. Fischbach & Sudha B. , 2014. "Diet rapidly and reproducibly alters the human gut microbiome," Nature, Nature, vol. 505(7484), pages 559-563, January.
    2. Robin D Couch & Karl Navarro & Masoumeh Sikaroodi & Pat Gillevet & Christopher B Forsyth & Ece Mutlu & Phillip A Engen & Ali Keshavarzian, 2013. "The Approach to Sample Acquisition and Its Impact on the Derived Human Fecal Microbiome and VOC Metabolome," PLOS ONE, Public Library of Science, vol. 8(11), pages 1-1, November.
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    1. Gregory E Miller & Phillip A Engen & Patrick M Gillevet & Maliha Shaikh & Masoumeh Sikaroodi & Christopher B Forsyth & Ece Mutlu & Ali Keshavarzian, 2016. "Lower Neighborhood Socioeconomic Status Associated with Reduced Diversity of the Colonic Microbiota in Healthy Adults," PLOS ONE, Public Library of Science, vol. 11(2), pages 1-17, February.

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