Journal
EMBO REPORTS
Volume 14, Issue 4, Pages 319-327Publisher
WILEY
DOI: 10.1038/embor.2013.27
Keywords
intestinal inflammation; dysbiosis; anaerobic respiration; Enterobacteriaceae
Categories
Funding
- Public Health Service [AI044170, AI076246, AI096528, AI060555]
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Our intestine is host to a large microbial community (microbiota) that educates the immune system and confers niche protection. Profiling of the gut-associated microbial community reveals a dominance of obligate anaerobic bacteria in healthy individuals. However, intestinal inflammation is associated with a disturbance of the microbiota-known as dysbiosis-that often includes an increased prevalence of facultative anaerobic bacteria. This group contains potentially harmful bacterial species, the bloom of which can further exacerbate inflammation. Here, we review the mechanisms that generate changes in the microbial community structure during inflammation. One emerging concept is that electron acceptors generated as by-products of the host inflammatory response feed facultative anaerobic bacteria selectively, thereby increasing their prevalence within the community. This new paradigm has broad implications for understanding dysbiosis during gut inflammation and identifies potential targets for intervention strategies.
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