antigen-presenting cells

antigen-presenting cells
Antigen-presenting cells (APCs) are cells that take in protein antigens, process them, and present antigen fragments to B-cells and T-cells in conjunction with class II MHC molecules so that the cells are activated. Macrophages, B-cells, dendritic cells, and Langerhans cells may act as APCs.

Microbiology. . 2009.

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  • antigen-presenting cell — n any of various cells (as a macrophage or a B cell) that take up and process an antigen into a form that when displayed at the cell surface in combination with a molecule of the major histocompatibility complex is recognized by and serves to… …   Medical dictionary

  • antigen presenting cell — A cell that carries on its surface antigen bound to MCH Class I or Class II molecules, and presents the antigen in this context to T cells. Includes macrophages, endothelium, dendritic cells and Langerhans cells of the skin. See also MHC… …   Dictionary of molecular biology

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  • Antigen presentation — is a process in the body s immune system by which macrophages, dendritic cells and other cell types capture antigens and then enable their recognition by T cells. NOTOC The basis of adaptive immunity lies in the capacity of immune cells to… …   Wikipedia

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