Cited by 1,880Gut microbiota and healthOral microbiology and periodontitis researchGastrointestinal motility and disorders

Human gut microbiota in obesity and after gastric bypass

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Zhang, Husen, DiBaise, John K., Zuccolo, Andrea, Kudrna, Dave, Braidotti, Michele, Yu, Yeisoo, Parameswaran, Prathap, Crowell, Michael D. +3 more·2009·Proceedings of the National Academy of Sciences

Abstract

Recent evidence suggests that the microbial community in the human intestine may play an important role in the pathogenesis of obesity. We examined 184,094 sequences of microbial 16S rRNA genes from PCR amplicons by using the 454 pyrosequencing technology to compare the microbial community structures of 9 individuals, 3 in each of the categories of normal weight, morbidly obese, and post-gastric-bypass surgery. Phylogenetic analysis demonstrated that although the Bacteria in the human intestinal community were highly diverse, they fell mainly into 6 bacterial divisions that had distinct differences in the 3 study groups. Specifically, Firmicutes were dominant in normal-weight and obese individuals but significantly decreased in post-gastric-bypass individuals, who had a proportional increase of Gammaproteobacteria. Numbers of the H(2)-producing Prevotellaceae were highly enriched in the obese individuals. Unlike the highly diverse Bacteria, the Archaea comprised mainly members of the order Methanobacteriales, which are H(2)-oxidizing methanogens. Using real-time PCR, we detected significantly higher numbers of H(2)-utilizing methanogenic Archaea in obese individuals than in normal-weight or post-gastric-bypass individuals. The coexistence of H(2)-producing bacteria with relatively high numbers of H(2)-utilizing methanogenic Archaea in the gastrointestinal tract of obese individuals leads to the hypothesis that interspecies H(2) transfer between bacterial and archaeal species is an important mechanism for increasing energy uptake by the human large intestine in obese persons. The large bacterial population shift seen in the post-gastric-bypass individuals may reflect the double impact of the gut alteration caused by the surgical procedure and the consequent changes in food ingestion and digestion.

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  1. [32]Lane DJ. In: Modern Microbiological Methods. Stackebrandt E, Goodfellow M, editors. Chichester, UK: Wiley; 1991. pp. 115–175. [Google Scholar]

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Authors
Zhang, H., DiBaise, J. K., Zuccolo, A., Kudrna, D., Braidotti, M., Yu, Y., Parameswaran, P., Crowell, M. D., Wing, R., Rittmann, B. E., & Krajmalnik-Brown, R.
Affiliations
  • Arizona State University (US)
  • Mayo Clinic in Arizona (US)
  • University of Arizona (US)
  • Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, Tempe, AZ 85287;
Venue
Proceedings of the National Academy of Sciences
Published
2009-02-17
Volume
106
Issue
7
Pages
2365-2370
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2084793748
Cited by
1,880
References
38
Citations by year
2026: 23 · 2025: 66 · 2024: 66 · 2023: 100 · 2022: 113 · 2021: 115 · 2020: 159 · 2019: 138 · 2018: 136 · 2017: 138 · 2016: 151 · 2015: 141 · 2014: 116 · 2013: 128 · 2012: 104
FWCI
38.56
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutional Research Information System (Sant'Anna School of Advanced Studies) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
gut microbiota, obesity, morbid obesity, gastric bypass, bariatric surgery, Firmicutes, Gammaproteobacteria, Prevotellaceae, hydrogen-producing bacteria, Methanobacteriales, interspecies hydrogen transfer, energy metabolism, microbial community structure, 16S rRNA gene sequencing
MeSH terms
Adult, Archaea, Female, Humans, Intestinal Mucosa, Intestines, Male, Middle Aged, Models, Biological, Molecular Sequence Data, Obesity, Postoperative Complications, RNA, Ribosomal, 16S, Gastric Bypass, Body Mass Index, Sequence Analysis, DNA

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