title: The impact of extracellular acidosis on dendritic cell function.
abstract: Dendritic cells (DCs) are the most efficient antigen-presenting cells. They are activated in the periphery by conserved pathogen molecules and by inflammatory mediators produced by a variety of cell types in response to danger signals. It is widely appreciated that inflammatory responses in peripheral tissues are usually associated with the development of acidic microenvironments. Surprisingly, there are relatively few studies directed to analyze the effect of extracellular acidosis on the immune response. We focus on the influence of extracellular acidosis on the function of immature DCs. The results presented here show that acidosis activates DCs. It increases the acquisition of extracellular antigens for MHC class I-restricted presentation and the ability of antigen-pulsed DCs to induce both specific CD8+ CTL and B-cell responses. These findings may have important implications to our understanding of the mechanisms through which DCs sense the presence of infection or inflammation in nonlymphoid tissues.
authors.affiliation: Institute of Hematologic Research, National Academy of Medicine, Department of Microbiology, Buenos Aires University School of Medicine, Buenos Aires, Argentina.
authors.forename: Mónica Elba
authors.initials: ME
authors.lastname: Vermeulen
authors.forename: Romina
authors.initials: R
authors.lastname: Gamberale
authors.forename: Analía Silvina
authors.initials: AS
authors.lastname: Trevani
authors.forename: Diego
authors.initials: D
authors.lastname: Martínez
authors.forename: Ana
authors.initials: A
authors.lastname: Ceballos
authors.forename: Juan
authors.initials: J
authors.lastname: Sabatte
authors.forename: Mirta
authors.initials: M
authors.lastname: Giordano
authors.forename: Jorge Raúl
authors.initials: JR
authors.lastname: Geffner
mesh_terms: D000138:Acidosis / Q000378:metabolism*; D000818:Animals; D017951:Antigen Presentation / Q000276:immunology; D000941:Antigens / Q000276:immunology; D002465:Cell Movement / Q000276:immunology; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D007249:Inflammation / Q000378:metabolism; D008221:Lymphoid Tissue / Q000166:cytology / Q000276:immunology; D008565:Membrane Proteins / Q000276:immunology; D009369:Neoplasms / Q000378:metabolism; D010873:Pinocytosis / Q000276:immunology; D011946:Receptors, Antigen / Q000276:immunology
chemical_list: D000941:Antigens; D008565:Membrane Proteins; D011946:Receptors, Antigen