Living reference work entry
CD69 was first described as the activation antigen expressed on natural killer (NK) cells and T lymphocytes upon in vitro stimulation with interleukin (IL)-2 (Lanier et al. 1988). Consecutive work demonstrated that CD69 expression does not depend on the nature of a specific stimulus as many different classes of molecules, such as concanavalin A, anti-CD3 antibody, phorbol myristate acetate (PMA), type I interferons (IFN), lipopolysaccharide, etc., can induce the expression of CD69. CD69 is a type II transmembrane protein belonging to the superfamily of the C-type lectins (CLEC) based on the presence of a conserved extracellular C-type lectin domain (CTLD, Fig. 1). CD69 also belongs to the family of NK cell receptors because the CD69gene locus is located within the NK cell receptor gene cluster, which is in humans located on chromosome 12 and in mice on chromosome 6. CD69 is a product of a single...
KeywordsNatural Killer Cell Treg Cell Phorbol Myristate Acetate S1P1 Receptor Th17 Cell Differentiation
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