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Regulation of T-cell immunity by leucocyte immunoglobulin-like receptors: innate immune receptors for self on antigen-presenting cells Anderson KJ; Allen RLImmunology 2009[May]; 127 (1): 8-17Following recognition of microbial patterns, innate immune receptors provide a rapid innate response and trigger antigen-presenting cell maturation to instruct adaptive immune responses. Here we discuss a family of innate immune receptors for self - the leucocyte immunoglobulin-like receptors (LILRs). These LILRs exert powerful inhibitory effects on antigen-presenting cell phenotype and subsequent T-cell responses, and may act to constrain the effects of Toll-like receptor signalling. Despite their broad ligand specificity, differing affinities of LILRs for individual complexes of peptide-major histocompatibility complex can determine the nature of their effect on downstream immune responses. Expression and function of LILRs may be skewed in certain conditions such as cancer or human immunodeficiency virus infection, particularly by ectopic expression of human leucocyte antigen-G, a high-affinity LILR ligand. We discuss the relevance of LILR-mediated immune regulation across a range of scenarios from autoimmunity to transplant medicine, infection and cancer.|Antigen-Presenting Cells/*immunology[MESH]|Autoimmune Diseases/immunology[MESH]|Communicable Diseases/immunology[MESH]|Humans[MESH]|Immune Tolerance/immunology[MESH]|Immunity, Cellular[MESH]|Immunotherapy/methods[MESH]|Neoplasms/immunology[MESH]|Organ Transplantation[MESH]|Receptors, Immunologic/*immunology[MESH]|T-Lymphocytes, Regulatory/*immunology[MESH] |
