MyD88 signalling in colonic mononuclear phagocytes drives colitis in IL-10-deficient mice
Commensal bacterial sensing by Toll-like receptors is critical for maintaining intestinal homeostasis, but can lead to colitis in the absence of interleukin-10. Although Toll-like receptors are expressed in multiple cell types in the colon, the cell type(s) responsible for the development of colitis...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group,
2014-09-03T14:37:29Z.
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| Subjects: | |
| Online Access: | Get fulltext |
| Summary: | Commensal bacterial sensing by Toll-like receptors is critical for maintaining intestinal homeostasis, but can lead to colitis in the absence of interleukin-10. Although Toll-like receptors are expressed in multiple cell types in the colon, the cell type(s) responsible for the development of colitis are currently unknown. Here we generated mice that are selectively deficient in MyD88 in various cellular compartments in an interleukin-10[superscript −/−] setting. Although epithelial expression of MyD88 was dispensable, MyD88 expression in the mononuclear phagocyte compartment was required for colitis development. Specifically, phenotypically distinct populations of colonic mononuclear phagocytes expressed high levels of interleukin-1β, interleukin-23 and interleukin-6, and promoted T-helper 17 responses in the absence of interleukin-10. Thus, gut bacterial sensing through MyD88 in mononuclear phagocytes drives inflammatory bowel disease when unopposed by interleukin-10. Howard Hughes Medical Institute National Institutes of Health (U.S.) (NIH grant DK071754) National Institutes of Health (U.S.) (NIH grant AI046688) National Institutes of Health (U.S.) (NIH grant AI055502) National Institutes of Health (U.S.) (NIH grant RO1OD011141) National Institutes of Health (U.S.) (Training grant) National Cancer Institute (U.S.) (Irvington Fellowship) |
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