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Gastrointestinal microbiology enters the metagenomics era
Abstract
PURPOSE OF REVIEW: Advances in DNA sequence-based technologies now permit genetic analysis of complex microbial populations without the need for prior cultivation. This review summarizes the molecular methods of culture-independent microbiology ('metagenomics') and their recent application to studies of the human gastrointestinal tract in both health and disease. RECENT FINDINGS: Culture-independent metagenomic surveys reveal unprecedented microbial biodiversity in the human intestine. Upwards of 40,000 bacterial species are estimated to comprise the collective gastrointestinal microbiome, most of which have not been characterized by culture. Diverse conditions such as antibiotic-associated diarrhea, Crohn's disease, ulcerative colitis, obesity, and pouchitis have been correlated with large-scale imbalances in gastrointestinal microbiota, or 'dysbiosis'. These findings demonstrate the importance of commensal microorganisms in maintaining gastrointestinal health. SUMMARY: Through technological and conceptual innovations in metagenomics, the complex microbial habitat of the human gastrointestinal tract is now amenable to detailed ecological analysis. Large-scale shifts in gut commensal populations, rather than occurrence of particular microorganisms, are associated with several gastroenterological conditions; redress of these imbalances may ameliorate the conditions.
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Metadata
- Authors
- Frank, D. N., & Pace, N. R.
- Venue
- Current Opinion in Gastroenterology
- Published
- 2008-01
- Volume
- 24
- Issue
- 1
- Pages
- 4-10
- ISSN
- 0267-1379 (ISSN-L)
- OpenAlex
- W1977085329
- Cited by
- 405
- References
- 11
- FWCI
- 19.23
- Type
- journal article
- Language
- en
- Open access
- closed
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