International Immunology Advance Access originally published online on March 28, 2006
International Immunology 2006 18(5):797-806; doi:10.1093/intimm/dxl016
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LIGHT is dispensable for CD4+ and CD8+ T cell and antibody responses to influenza A virus in mice
1 Department of Immunology, Room 5263, Medical Sciences Building, University of Toronto, Toronto, ON M5S 1A8, Canada
2 Institut für Medizinische Mikrobiologie, Universitätsklinikum der Heinrich-Heine-Universität, Düsseldorf, Germany
3 Present address: Department of Microbiology and Immunology, Sir Charles Tupper Medical Building, Dalhousie University, Halifax, NS B3H 4H7, Canada
Correspondence to: T. H. Watts; E-mail: tania.watts{at}utoronto.ca
The tumor necrosis factor family ligands, LIGHT (lymphotoxin like, exhibits inducible expression and competes with HSV glycoprotein D for HVEM, a receptor expressed by T lymphocytes), 4-1BBL and CD70, are found in the same gene cluster on mouse chromosome 17. Although the roles of 4-1BB–4-1BBL and CD27–CD70 interactions in anti-viral T cell responses have been well established, the role of LIGHT in T cell activation/expansion in vivo is less clear. Under conditions that were previously employed to demonstrate a role for 4-1BBL in CD8+ T cell memory, wild-type and LIGHT–/– mice were infected with influenza A virus and primary and memory/recall responses were measured at various time points thereafter. Neither primary expansion nor memory/recall CD8+ T cell responses were affected by the absence of LIGHT, as measured up to 2 months post-infection. CD4+ T cell responses were also unaffected by LIGHT deficiency. Furthermore, we found that LIGHT played no role in the induction of influenza-specific IgG1 and IgG2a serum antibodies. Taken together, these data suggest that LIGHT is dispensable for the acquired immune response to influenza virus in mice with no effect on the induction, maintenance or reactivation of CD8+ T cell memory.
Keywords: co-stimulation, influenza, knockout mice, LIGHT, memory T cells
Transmitting editor: K. Okumura
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