alexa Induction of protective IgA by intestinal dendritic cells carrying commensal bacteria.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Macpherson AJ, Uhr T, Macpherson AJ, Uhr T, Macpherson AJ, Uhr T, Macpherson AJ, Uhr T

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Abstract The enormous number of commensal bacteria in the lower intestine of vertebrates share abundant molecular patterns used for innate immune recognition of pathogenic bacteria. We show that, even though commensals are rapidly killed by macrophages, intestinal dendritic cells (DCs) can retain small numbers of live commensals for several days. This allows DCs to selectively induce IgA, which helps protect against mucosal penetration by commensals. The commensal-loaded DCs are restricted to the mucosal immune compartment by the mesenteric lymph nodes, which ensures that immune responses to commensal bacteria are induced locally, without potentially damaging systemic immune responses. This article was published in Science and referenced in Journal of Clinical Toxicology

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