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Mucosal immunology is the study of immune system responses that occur at mucosal membranes of the intestines, the urogenital tract, and the respiratory system. [1] The mucous membranes are in constant contact with microorganisms , food, and inhaled antigens . [ 2 ]
Mucosal Immunology is the official publication of the Society for Mucosal Immunology (SMI). It aims to provide a forum for both basic and clinical scientists to discuss all aspects of immunity and inflammation involving mucosal tissues. The journal reflects the interests of scientists studying gastrointestinal, pulmonary, nasopharyngeal, oral ...
The mucosa-associated lymphoid tissue (MALT), also called mucosa-associated lymphatic tissue, is a diffuse system of small concentrations of lymphoid tissue found in various submucosal membrane sites of the body, such as the gastrointestinal tract, nasopharynx, thyroid, breast, lung, salivary glands, eye, and skin.
Gut-associated lymphoid tissue (GALT) [1] is a component of the mucosa-associated lymphoid tissue (MALT) which works in the immune system to protect the body from invasion in the gut. Owing to its physiological function in food absorption, the mucosal surface is thin and acts as a permeable barrier to the interior of the body.
Mucosal-associated invariant T cells (MAIT cells) make up a subset of T cells in the immune system that display innate, effector-like qualities. [ 1 ] [ 2 ] In humans, MAIT cells are found in the blood, liver, lungs, and mucosa , defending against microbial activity and infection. [ 1 ]
The intestinal mucosal barrier is a heterogeneous entity composed of physical, biochemical, and immune elements elaborated by the intestinal mucosa. The central component is the intestinal epithelial layer, which provides physical separation between the lumen and the body.
Innate lymphoid cells (ILCs) are the most recently discovered family of innate immune cells, derived from common lymphoid progenitors (CLPs). In response to pathogenic tissue damage, ILCs contribute to immunity via the secretion of signalling molecules, and the regulation of both innate and adaptive immune cells.
These antibodies are released into the gut mucosa, salivary glands, and lymph nodes. However, in females that are lactating, M cells recognize antigen and IgA is directed from the gut to the mammary gland. IgA traveling from the gut to breast milk supply is controlled by hormones, chemokines, and cytokines.