title: Characterization of human CD8+ T cells reactive with Mycobacterium tuberculosis-infected antigen-presenting cells.
abstract: Previous studies in murine models, including those using the beta2 microglobulin knockout mouse, have suggested an important role for CD8+ T cells in host defense to Mycobacterium tuberculosis (Mtb). At present, little is understood about these cells in the human immune response to tuberculosis. This report demonstrates the existence of human Mtb-reactive CD8+ T cells. These cells are present preferentially in persons infected with Mtb and produce interferon gamma in response to stimulation with Mtb-infected target cells. Recognition of Mtb-infected cells by these CD8+ T cells is restricted neither by the major histocompatibility complex (MHC) class I A, B, or C alleles nor by CD1, although it is inhibited by anti-MHC class I antibody. The Mtb-specific CD8+ T cells recognize an antigen which is generated in the proteasome, but which does not require transport through the Golgi-ER. The data suggest the possible use of nonpolymorphic MHC class Ib antigen presenting structures other than CD1.
authors.affiliation: Division of Pulmonary & Critical Care Medicine, University of Washington, Seattle, Washington 98104, USA. dml@u.washington.edu
authors.forename: D M
authors.initials: DM
authors.lastname: Lewinsohn
authors.forename: M R
authors.initials: MR
authors.lastname: Alderson
authors.forename: A L
authors.initials: AL
authors.lastname: Briden
authors.forename: S R
authors.initials: SR
authors.lastname: Riddell
authors.forename: S G
authors.initials: SG
authors.lastname: Reed
authors.forename: K H
authors.initials: KH
authors.lastname: Grabstein
mesh_terms: D000111:Acetylcysteine / Q000031:analogs & derivatives / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D017951:Antigen Presentation / Q000187:drug effects; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000382:microbiology; D002738:Chloroquine / Q000494:pharmacology; D015853:Cysteine Proteinase Inhibitors / Q000494:pharmacology; D006801:Humans; D008211:Lymphocyte Cooperation; D051379:Mice; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000276:immunology*; D014376:Tuberculosis / Q000276:immunology
chemical_list: D015853:Cysteine Proteinase Inhibitors; C067713:lactacystin; D002738:Chloroquine; D000111:Acetylcysteine