In:
The Journal of Immunology, The American Association of Immunologists, Vol. 178, No. 1_Supplement ( 2007-04-01), p. S34-S34
Abstract:
Intestinal epithelial cells (IECs) provide a primary physical barrier against commensal and pathogenic microorganisms in the gastrointestinal (GI) tract, but the influence of IECs on the regulation of immunity is unknown. Here we show that IEC-intrinsic IKKβ-dependent gene expression is a critical regulator of dendritic cell (DC) and CD4+ T cell responses in the gut. Following infection with the parasite Trichuris, littermate control mice develop pathogen-specific TH2 cytokine responses and eradicate infection while mice with an IEC-specific deletion of IKKβ (IkkbΔIEC mice) fail to do so. Further, IkkbΔIEC mice exhibit exacerbated production of DC-derived IL-12/23p40 and TNF-α, heightened levels of CD4+ T cell-derived IFN-γ and IL-17, and develop severe intestinal inflammation. Blockade of proinflammatory cytokines during Trichuris infection ablates the requirement for IKKβ in IECs to promote CD4+ TH2 cell-dependent immunity, identifying a critical role for IECs in limiting type 1 cytokine production in the GI tract. These results suggest that the balance of IKKβ-dependent gene expression is critical for intestinal immune homeostasis by promoting mucosal immunity and limiting chronic inflammation. This work is funded by the NIH, CCFA and the Irvington Institute.
Type of Medium:
Online Resource
ISSN:
0022-1767
,
1550-6606
DOI:
10.4049/jimmunol.178.Supp.42.4
Language:
English
Publisher:
The American Association of Immunologists
Publication Date:
2007
detail.hit.zdb_id:
1475085-5
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