title: Alpha tumor necrosis factor contributes to CD8(+) T cell survival in the transition phase.
abstract: Cytokine and costimulation signals determine CD8(+) T cell responses in proliferation phase. In this study, we assessed the potential effect of cytokines and costimulations to CD8(+) T cell survival in transition phase by transferring in vitro ovalbumin (OVA)-pulsed dendritic cell-activated CD8(+) T cells derived from OVA-specific T cell receptor transgenic OT I mice into wild-type C57BL/6 mice or mice with designated gene knockout. We found that deficiency of IL-10, IL-12, IFN-gamma, CD28, CD40, CD80, CD40L, and 41BBL in recipients did not affect CD8(+) T cell survival after adoptive transfer. In contrast, TNF-alpha deficiency in both recipients and donor CD8(+) effector T cells significantly reduced CD8(+) T cell survival. Therefore, our data demonstrate that the host- and T cell-derived TNF-alpha signaling contributes to CD8(+) effector T cell survival and their transition to memory T cells in the transition phase, and may be useful information when designing vaccination.
authors.affiliation: Research Unit, Saskatchewan Cancer Agency, Department of Oncology, University of Saskatchewan, 20 Campus Drive, Saskatoon, Sask., Canada S7N 4H4.
authors.forename: Meiqing
authors.initials: M
authors.lastname: Shi
authors.forename: Zhenmin
authors.initials: Z
authors.lastname: Ye
authors.forename: Keshav Sokke
authors.initials: KS
authors.lastname: Umeshappa
authors.forename: Terence
authors.initials: T
authors.lastname: Moyana
authors.forename: Jim
authors.initials: J
authors.lastname: Xiang
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D015703:Antigens, CD / Q000235:genetics; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology* / Q000637:transplantation; D002470:Cell Survival / Q000276:immunology; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000276:immunology; D016130:Immunophenotyping; D007378:Interleukins / Q000235:genetics; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D010047:Ovalbumin / Q000276:immunology; D015398:Signal Transduction / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000502:physiology*
chemical_list: D015703:Antigens, CD; D007378:Interleukins; D014409:Tumor Necrosis Factor-alpha; D010047:Ovalbumin