The chemokine receptor CCR2 is critical for protective memory CD8<sup>+</sup> T cell generation following viral infection — ASN Events

The chemokine receptor CCR2 is critical for protective memory CD8+ T cell generation following viral infection (#213)

Kevin Aaron Fenix 1 , Todd Norton 1 , Ervin Kara 1 , Cyril Seillet 2 , Christopher Andoniou 3 , Cameron Bastow 1 , Carly Gregor 1 , Duncan McKenzie 1 , Mohammed Alsharifi 4 , Mariapia Degli-Esposti 3 , Gabrielle Belz 2 , Iain Comerford 1 , Shaun McColl 1
  1. Chemokine Biology Laboratoty, The University of Adelaide, Adelaide, SA, Australia
  2. The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
  3. Centre for Experimental Immunology, Lions Eye Institute, Nedlands, WA, Australia
  4. University of Adelaide, Adelaide, SA, Australia

Memory CD8+ T cells are important for controlling reinfection against intracellular pathogens, yet the migratory signals required for CD8+ T cell memory formation are poorly understood. In this study, we show that the chemokine receptor CCR2 is expressed on CD8+ T cells following influenza A infection. CCR2-deficient antigen-specific CD8+ T cells displayed normal effector cell differentiation and cytokine production but impaired development of memory precursor cells. Furthermore, CCR2-/- CD8+ T cells had reduced proliferation in the late stages of infection. This led to enhanced CD8+ T cell contraction alongside a cell intrinsic defect in the formation of central and tissue-resident memory CD8+ T cells. Consistent with these observations, CCR2-/- memory CD8+ T cells failed to efficiently control secondary infection against intracellular pathogens. These data uncover a novel CCR2-dependent pathway critical for generating memory CD8+ T cells.

 

#ASI2017QLD