title: Organ-specific regulation of the CD8 T cell response to Listeria monocytogenes infection.
abstract: The intestinal mucosal CD8 T cell response to infection with Listeria monocytogenes was measured using MHC class I tetramers and was compared with the response in peripheral blood, secondary lymphoid tissue, and liver. To assess the vaccination potential of Listeria and to analyze responses in C57BL/6 mouse strains, a recombinant Listeria expressing OVA (rLM-ova) was generated. The response peaked at 9 days postinfection with a much larger fraction of the intestinal mucosa and liver CD8 T cell pool OVA specific, as compared with the spleen. However, these differences were not linked to bacterial titers in each site. The higher responses in lamina propria and liver resulted in a larger CD8 memory population in these tissues. Furthermore, the level of memory induced was dependent on infectious dose and inversely correlated with the magnitude of the recall response after oral challenge. Recall responses in the tissues were most robust in the lamina propria and liver, and reactivated Ag-specific T cells produced IFN-gamma. Infection of CD40- or MHC class II-deficient mice induced poor CD8 T cell responses in the intestinal mucosa, but only partially reduced responses in the spleen and liver. Overall, the results point to novel pathways of tissue-specific regulation of primary and memory antimicrobial CD8 T cell responses.
authors.affiliation: Division of Rheumatic Diseases, University of Connecticut Health Center, Farmington, CT 06030, USA.
authors.forename: C
authors.initials: C
authors.lastname: Pope
authors.forename: S K
authors.initials: SK
authors.lastname: Kim
authors.forename: A
authors.initials: A
authors.lastname: Marzo
authors.forename: D
authors.initials: D
authors.lastname: Masopust
authors.forename: K
authors.initials: K
authors.lastname: Williams
authors.forename: J
authors.initials: J
authors.lastname: Jiang
authors.forename: H
authors.initials: H
authors.lastname: Shen
authors.forename: L
authors.initials: L
authors.lastname: Lefrançois
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001428:Bacterial Vaccines / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism; D019013:CD40 Antigens / Q000096:biosynthesis; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000382:microbiology*; D004306:Dose-Response Relationship, Immunologic; D004527:Egg Proteins / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D007117:Immunization, Secondary; D016056:Immunodominant Epitopes / Q000276:immunology; D007156:Immunologic Memory / Q000235:genetics; D007413:Intestinal Mucosa / Q000276:immunology / Q000382:microbiology; D008089:Listeria monocytogenes / Q000235:genetics / Q000276:immunology; D008088:Listeriosis / Q000097:blood / Q000276:immunology* / Q000382:microbiology; D008099:Liver / Q000276:immunology / Q000382:microbiology; D008213:Lymphocyte Activation / Q000235:genetics; D008221:Lymphoid Tissue / Q000276:immunology / Q000382:microbiology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D009928:Organ Specificity / Q000276:immunology; D010047:Ovalbumin / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology; D010446:Peptide Fragments; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D019013:CD40 Antigens; D004527:Egg Proteins; D018984:Epitopes, T-Lymphocyte; D016056:Immunodominant Epitopes; C110366:OVA-8; D010446:Peptide Fragments; D014614:Vaccines, Synthetic; D010047:Ovalbumin