Dendritic cells in gut-associated lymphoid tissue (GALT DCs)

Dendritic cells in gut-associated lymphoid tissue (GALT) are specialized antigen-presenting cells essential for maintaining intestinal homeostasis (Nature Reviews Immunology, 2008). They are strategically located in the lamina propria, Peyer's patches, and mesenteric lymph nodes to sample antigens from the gut lumen (Frontiers in Immunology, 2017). These cells are unique in their ability to balance the induction of protective immunity against pathogens with tolerance toward commensal bacteria and food antigens. A key subset, CD103+ dendritic cells, promotes the differentiation of Foxp3+ regulatory T cells via the production of retinoic acid and TGF-beta (Journal of Clinical Investigation, 2013). In pathological states like Crohn's disease and ulcerative colitis, the tolerogenic function of GALT dendritic cells is often compromised, leading to aberrant inflammatory responses (Gastroenterology, 2015). Therapeutic strategies often focus on modulating the recruitment or activation of these cells to restore the gut's immune balance. While not a single molecule, they express specific receptors like CCR7 and integrins that are targeted by modern biologics to control leukocyte trafficking. Understanding the heterogeneity of GALT dendritic cells is crucial for developing site-specific treatments for mucosal inflammatory disorders (Immunity, 2016).

Other names

Gut-associated lymphoid tissue dendritic cellsIntestinal dendritic cellsMucosal dendritic cellsGALT-resident dendritic cells

Modulation of mucosal immune homeostasis, induction of regulatory T-cell differentiation, and regulation of leukocyte trafficking to gut-associated lymphoid tissues.