Cited by 821Gut microbiota and healthBioinformatics and Genomic NetworksGenomics and Phylogenetic Studies

Metagenomic systems biology of the human gut microbiome reveals topological shifts associated with obesity and inflammatory bowel disease

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Greenblum, Sharon, Turnbaugh, Peter J., Borenstein, Elhanan·2012·Proceedings of the National Academy of Sciences

Abstract

The human microbiome plays a key role in a wide range of host-related processes and has a profound effect on human health. Comparative analyses of the human microbiome have revealed substantial variation in species and gene composition associated with a variety of disease states but may fall short of providing a comprehensive understanding of the impact of this variation on the community and on the host. Here, we introduce a metagenomic systems biology computational framework, integrating metagenomic data with an in silico systems-level analysis of metabolic networks. Focusing on the gut microbiome, we analyze fecal metagenomic data from 124 unrelated individuals, as well as six monozygotic twin pairs and their mothers, and generate community-level metabolic networks of the microbiome. Placing variations in gene abundance in the context of these networks, we identify both gene-level and network-level topological differences associated with obesity and inflammatory bowel disease (IBD). We show that genes associated with either of these host states tend to be located at the periphery of the metabolic network and are enriched for topologically derived metabolic "inputs." These findings may indicate that lean and obese microbiomes differ primarily in their interface with the host and in the way they interact with host metabolism. We further demonstrate that obese microbiomes are less modular, a hallmark of adaptation to low-diversity environments. We additionally link these topological variations to community species composition. The system-level approach presented here lays the foundation for a unique framework for studying the human microbiome, its organization, and its impact on human health.

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Crossref · 10.1073/pnas.1116053109

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Authors
Greenblum, S., Turnbaugh, P. J., & Borenstein, E.
Affiliations
  • University of Washington (US)
  • Harvard University (US)
  • Santa Fe Institute (US)
Venue
Proceedings of the National Academy of Sciences
Published
2011-12-19
Volume
109
Issue
2
Pages
594-599
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2088209062
Cited by
821
References
54
Citations by year
2026: 14 · 2025: 25 · 2024: 39 · 2023: 40 · 2022: 50 · 2021: 73 · 2020: 79 · 2019: 49 · 2018: 50 · 2017: 79 · 2016: 64 · 2015: 77 · 2014: 80 · 2013: 62 · 2012: 39
FWCI
23.35
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (GM068763)
  • National Human Genome Research Institute (T32HG000035)
  • National Institute of General Medical Sciences (P50GM068763)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
human gut microbiome, obesity, inflammatory bowel disease, microbial metabolic networks, network topology, network modularity, monozygotic twins, host-microbe interactions, microbial community composition, gene abundance
MeSH terms
Feces, Humans, Obesity, Species Specificity, Inflammatory Bowel Diseases, Statistics, Nonparametric, Computational Biology, Databases, Genetic, Gastrointestinal Tract, Systems Biology, Metabolic Networks and Pathways, Metagenome, Metagenomics

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