PMID: 29755892May 15, 2018Paper

Regional control of regulatory immune cells in the intestine

Current Pathobiology Reports
Tina L MorhardtNobuhiko Kamada

Abstract

The intestine contains the largest compartment of immune regulatory cells which include T regulatory cells and IL-10 producing macrophages. These cell populations serve to restrain unnecessary immune responses of the intestine, which may lead to the pathogenesis of Crohn's disease or food allergy. This review discusses the recent findings pertaining to the functional regulation of these cells which may provide insight into novel therapies. Both T regulatory cells and macrophages are regulated in microbiota-dependent and microbiota-independent manners, i.e., dietary antigens. Often, this is specific to regional specialization and environment in small intestine vs. colon. These immune regulatory cells are largely regulated by microbiota in the colon, whereas in the small intestine, the microbiota has less affect, as seen in germ-free mice studies. Targeting these cells in their specific compartments may direct future treatment modalities for inflammatory bowel disease as ulcerative colitis and Crohn's are vastly different diseases.

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