title: Cutting edge: profound defect in T cell responses in TNF receptor-associated factor 2 dominant negative mice.
abstract: TNFR-associated factor 2 (TRAF2) is an adapter protein that links several members of the TNFR family to downstream signaling pathways. Mice expressing a dominant negative form of TRAF2 in their lymphoid cells (TRAF2.DN mice) have a profound defect in T cell responses to allogeneic APC. In contrast, APC from wild-type or TRAF2.DN mice show an equivalent level of stimulation in a MLR. Ab production and class switch are unimpaired in TRAF2.DN mice. Thus, defects in the TRAF.DN mice appear to be limited to T cells. TRAF2.DN mice demonstrate an impaired T cell response to influenza virus, including decreased secondary expansion of IFN-gamma-secreting T cells as well as a decrease in CTL activity. CD4 T cell production of IL-2 was also dramatically impaired in TRAF2.DN mice. These studies suggest an essential role of TRAF2-linked receptors in secondary CD4 and CD8 T cell responses and have important implications for transplantation.
authors.affiliation: Department of Immunology, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Cannons
authors.forename: Edward M
authors.initials: EM
authors.lastname: Bertram
authors.forename: Tania H
authors.initials: TH
authors.lastname: Watts
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000235:genetics; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic / Q000235:genetics; D007117:Immunization, Secondary; D007156:Immunologic Memory / Q000235:genetics; D009980:Influenza A virus / Q000276:immunology; D008213:Lymphocyte Activation / Q000235:genetics; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D009976:Orthomyxoviridae Infections / Q000235:genetics / Q000276:immunology; D011506:Proteins / Q000235:genetics*; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics / Q000378:metabolism*; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism; D047992:TNF Receptor-Associated Factor 2
chemical_list: D011506:Proteins; D018124:Receptors, Tumor Necrosis Factor; D047992:TNF Receptor-Associated Factor 2