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Dichotomous Expression of TNF Superfamily Ligands on Antigen-Presenting Cells Controls Post-priming Anti-viral CD4+ T Cell Immunity.

Immunity | Nov 21, 2017

T cell antigen-presenting cell (APC) interactions early during chronic viral infection are crucial for determining viral set point and disease outcome, but how and when different APC subtypes contribute to these outcomes is unclear. The TNF receptor superfamily (TNFRSF) member GITR is important for CD4+ T cell accumulation and control of chronic lymphocytic choriomeningitis virus (LCMV). We found that type I interferon (IFN-I) induced TNFSF ligands GITRL, 4-1BBL, OX40L, and CD70 predominantly on monocyte-derived APCs and CD80 and CD86 predominantly on classical dendritic cells (cDCs). Mice with hypofunctional GITRL in Lyz2+ cells had decreased LCMV-specific CD4+ T cell accumulation and increased viral load. GITR signals in CD4+ T cells occurred after priming to upregulate OX40, CD25, and chemokine receptor CX3CR1. Thus IFN-I (signal 3) induced a post-priming checkpoint (signal 4) for CD4+ T cell accumulation, revealing a division of labor between cDCs and monocyte-derived APCs in regulating T cell expansion.

Pubmed ID: 29150240 RIS Download

Mesh terms: Animals | Antigen-Presenting Cells | CD27 Ligand | CD4-Positive T-Lymphocytes | CX3C Chemokine Receptor 1 | Dendritic Cells | Female | Glucocorticoid-Induced TNFR-Related Protein | Lymphocytic Choriomeningitis | Membrane Glycoproteins | Mice | Mice, Inbred C57BL | Monocytes | Tumor Necrosis Factors

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Associated grants

  • Agency: CIHR, Id: MOP-123480
  • Agency: CIHR, Id: FDN-143250
  • Agency: CIHR, Id: GSD-134854
  • Agency: CIHR, Id: DOB128604

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