Requirement of high-affinity IL-2-IL-2R interaction for T cell anergy induction.
Incomplete T cell antigen receptor-mediated signaling induces an unresponsive state known as anergy. Previously, we had shown that anergy can be induced in antigen-primed but not naive T cells. In this report, we found that in vitro primed T cells from IL-2R alpha-deficient mice were resistant to anergy induction in contrast to comparably treated wild-type T cells. This resistance persisted even after proliferation of IL-2R alpha chain-deficient CD4 T cells with high-dose IL-2-IL-2R beta gamma chains interaction. Thus, antigen activation, and/or progression through cell cycle are not sufficient to induce anergy susceptibility in T cells. The high-affinity IL-2-IL-2R interaction appears to play a critical role in this process.
Hayashi
Robert J
RJ
Department of Pathology and Immunology, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO 63110, USA.
Kanagawa
Osami
O
D000818:Animals; D015551:Autoimmunity / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D017635:Clonal Anergy / Q000276:immunology / Q000502:physiology*; D005434:Flow Cytometry; D007376:Interleukin-2 / Q000276:immunology* / Q000378:metabolism; D053645:Interleukin-2 Receptor alpha Subunit; D008213:Lymphocyte Activation; D051379:Mice; D008822:Mice, Transgenic; D015375:Receptors, Interleukin-2 / Q000172:deficiency / Q000235:genetics / Q000276:immunology* / Q000378:metabolism
C508018:Il2ra protein, mouse; D007376:Interleukin-2; D053645:Interleukin-2 Receptor alpha Subunit; D015375:Receptors, Interleukin-2