title: CD8+ T cells responding to influenza infection reach and persist at higher numbers than CD4+ T cells independently of precursor frequency.
abstract: The activation, localization, phenotypic changes, and function of CFSE-labeled naive influenza-specific CD8(+) and CD4(+) T cells following influenza infection were examined. Response of adoptively transferred CD8(+) T cells was seen earliest in draining lymph node. Highly activated cells were found later in the lung, airways, and spleen, were cytolytic, and expressed IFN-gamma upon restimulation. Similar amounts of division at early time points, but higher numbers of CD8(+) T cells, were detected at 9 and 30 days postinfection after cotransfer of CD4(+) and CD8(+) T cells followed by infection. Transfer of much smaller numbers of CD4(+) and CD8(+) T cells led to more extensive expansion but the same difference in final number between the two cell types. These studies demonstrate how CD8(+) and CD4(+) T cells respond to influenza at early time points postinfection and the differential kinetics of antigen-specific CD4(+) and CD8(+) T cells.
authors.affiliation: Trudeau Institute, Saranac Lake, NY 12983, USA.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Powell
authors.forename: Deborah M
authors.initials: DM
authors.lastname: Brown
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Hollenbaugh
authors.forename: Tina
authors.initials: T
authors.lastname: Charbonneau
authors.forename: Roslyn A
authors.initials: RA
authors.lastname: Kemp
authors.forename: Susan L
authors.initials: SL
authors.lastname: Swain
authors.forename: Richard W
authors.initials: RW
authors.lastname: Dutton
mesh_terms: D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D002455:Cell Division / Q000276:immunology; D007371:Interferon-gamma / Q000378:metabolism; D008168:Lung / Q000166:cytology / Q000276:immunology; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D009975:Orthomyxoviridae / Q000276:immunology; D009976:Orthomyxoviridae Infections / Q000276:immunology*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000276:immunology
chemical_list: D011948:Receptors, Antigen, T-Cell; D007371:Interferon-gamma