Microbial-gut interactions in health and disease. Interactions between dendritic cells and bacteria in the regulation of intestinal immunity
- PMID: 15123068
- DOI: 10.1016/j.bpg.2003.10.004
Microbial-gut interactions in health and disease. Interactions between dendritic cells and bacteria in the regulation of intestinal immunity
Abstract
Dendritic cells (DCs) are immunoregulatory antigen-presenting cells. DCs can be potent activators of naïve T cells and influence the generation and homing of effector lymphocytes; they can also induce regulatory mechanisms and maintain non-responsiveness. In part, these different outcomes are influenced by exposure of the DC to microbial products. The regulatory role of DCs is of particular importance at mucosal surfaces such as the intestine, where the immune system exists in intimate association with the external antigenic environment. Much of what we know about DCs has come from studies on the cells outside the gastrointestinal tract but information about gut DCs and their contribution to the specialized immune environment of the gut is now emerging. Here, we review current knowledge on gut DCs, suggest models for interactions between DCs and the commensal microflora in health and disease, and discuss gut DCs as targets for probiotic therapies.
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