Type 2 immunity-dependent reduction of segmented filamentous bacteria in mice infected with the helminthic parasite Nippostrongylus brasiliensis. Issue 1 (December 2015)

• Record Type: Journal Article
• Authors: Fricke, W.; Song, Yang; Wang, An-Jiang; Smith, Allen; Grinchuk, Viktoriya; Pei, Chenlin; Ma, Bing; Lu, Nonghua; Urban, Joseph; Shea-Donohue, Terez; Zhao, Aiping
• Is Part Of: Microbiome. Volume 3:Issue 1(2015)
• Page Start: 1
• Page End: 12
• Publication Date: 2015-12
• Subjects: Helminth parasite -- Nippostrongylus brasiliensis -- Type 2 immunity -- IL-13 -- STAT6 -- Antimicrobial peptides -- Segmented filamentous bacteria -- IL-17 -- Microbiota; Microbiology -- Periodicals; Microorganisms -- Periodicals; Medical microbiology -- Periodicals; Soil microbiology -- Periodicals; Microbiological Phenomena -- Periodicals; Environmental Microbiology -- Periodicals; Medical microbiology; Microbiology; Microorganisms; Soil microbiology; Periodicals; Electronic journals; 579.17
• DOI: 10.1186/s40168-015-0103-8
• Languages: English
• ISSNs: 2049-2618

Abstract

Abstract Background Dynamic interactions between the host and gastrointestinal microbiota play an important role for local and systemic immune homeostasis. Helminthic parasites modulate the host immune response, resulting in protection against autoimmune disease but also increased susceptibility to pathogen infection. The underlying mechanisms remain largely unknown. Results We showed that the type 2 immune response to entericNippostrongylus brasiliensis infection in mice was associated with altered intestinal mucin and AMP expression and shifts in microbiota composition. Most strikingly, infection reduced concentrations of intestinal segmented filamentous bacteria (SFB), known inducers of T helper 17 cells, and IL-17-associated gene expression. Infected mice deficient in IL-13 or STAT6 did not reduce SFB or IL-17, and exogenous IL-25 replicated the effects of parasite infection in wild type mice. Conclusions Our data show that parasite infection acts through host type 2 immunity to reduce intestinal SFB and expression of IL-17, providing an example of a microbiota-dependent immune modulation by parasites.