title: Autophagy and its role in MHC-mediated antigen presentation.
abstract: Intracellular degradation by autophagy plays a role in the maintenance of cellular homeostasis under normal conditions and during periods of cellular stress. Autophagy has also been implicated in several other cellular processes including immune recognition and responsiveness. More specifically, autophagy has been identified as a route by which cytoplasmic and nuclear Ag are delivered to MHC class II molecules for presentation to CD4(+) T cells. Autophagy has also recently been implicated in MHC class I cross-presentation of tumor Ag and the activation of CD8(+) T cells. This review discusses the role of autophagy in modulating MHC class I and class II Ag presentation as well as its implication in regulating autoimmunity and tolerance, tumor immunity, and host defense against intracellular pathogens.
authors.affiliation: Department of Microbiology and Immunology and the Walther Oncology Center, Indiana University School of Medicine and the Walther Cancer Institute, Indianapolis, IN 46202, USA.
authors.forename: Victoria L
authors.initials: VL
authors.lastname: Crotzer
authors.forename: Janice S
authors.initials: JS
authors.lastname: Blum
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000276:immunology*; D001343:Autophagy / Q000276:immunology*; D015395:Histocompatibility Antigens Class I / Q000276:immunology* / Q000378:metabolism*; D000949:Histocompatibility Antigens Class II / Q000276:immunology* / Q000378:metabolism*; D006801:Humans; D018832:Molecular Chaperones / Q000276:immunology / Q000378:metabolism
chemical_list: D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D018832:Molecular Chaperones