title: Innate immune response and hepatic inflammation.
abstract: Inflammation is a pathogenic component of various types of acute and chronic liver diseases, and it contributes to progressive liver damage and fibrosis. Cells of the innate immune system initiate and maintain hepatic inflammation though mediator production as a result of their activation by pathogen-derived products recognized by pattern recognition receptors. Innate immune cells, particularly dendritic cells, have a pivotal role in sensing pathogens and initiating adaptive immune responses by activation and regulation of T-lymphocyte responses. Although the liver provides a "tolerogenic" immune environment for antigen-specific T-cells, activation of Kupffer cells, recruited macrophages, and inflammatory cells results in production of cytokines and chemokines that can lead to prolonged inflammation, hepatocyte damage, and/or cholestasis. The specificity of Toll-like receptors and the mechanisms of innate immune cell activation are discussed in relation to acute and chronic liver injury including viral, alcoholic, nonalcoholic, and drug-induced hepatitis.
authors.affiliation: Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA. gyongyi.szabo@umassmed.edu
authors.forename: Gyongyi
authors.initials: G
authors.lastname: Szabo
authors.forename: Pranoti
authors.initials: P
authors.lastname: Mandrekar
authors.forename: Angela
authors.initials: A
authors.lastname: Dolganiuc
mesh_terms: D000818:Animals; D016207:Cytokines / Q000378:metabolism; D006801:Humans; D007113:Immunity, Innate / Q000276:immunology*; D007249:Inflammation / Q000276:immunology* / Q000378:metabolism; D008099:Liver / Q000276:immunology / Q000378:metabolism; D008107:Liver Diseases / Q000276:immunology* / Q000378:metabolism; D008954:Models, Biological
chemical_list: D016207:Cytokines