[PDF][PDF] Expeditious recruitment of circulating memory CD8 T cells to the liver facilitates control of malaria

MN Lefebvre, FA Surette, SM Anthony, R Vijay… - Cell reports, 2021 - cell.com
MN Lefebvre, FA Surette, SM Anthony, R Vijay, IJ Jensen, LL Pewe, LS Hancox…
Cell reports, 2021cell.com
Circulating memory CD8 T cell trafficking and protective capacity during liver-stage malaria
infection remains undefined. We find that effector memory CD8 T cells (Tem) infiltrate the
liver within 6 hours after malarial or bacterial infections and mediate pathogen clearance.
Tem recruitment coincides with rapid transcriptional upregulation of inflammatory genes in
Plasmodium-infected livers. Recruitment requires CD8 T cell-intrinsic LFA-1 expression and
the presence of liver phagocytes. Rapid Tem liver infiltration is distinct from recruitment to …
Summary
Circulating memory CD8 T cell trafficking and protective capacity during liver-stage malaria infection remains undefined. We find that effector memory CD8 T cells (Tem) infiltrate the liver within 6 hours after malarial or bacterial infections and mediate pathogen clearance. Tem recruitment coincides with rapid transcriptional upregulation of inflammatory genes in Plasmodium-infected livers. Recruitment requires CD8 T cell-intrinsic LFA-1 expression and the presence of liver phagocytes. Rapid Tem liver infiltration is distinct from recruitment to other non-lymphoid tissues in that it occurs both in the absence of liver tissue resident memory "sensing-and-alarm" function and ∼42 hours earlier than in lung infection by influenza virus. These data demonstrate relevance for Tem in protection against malaria and provide generalizable mechanistic insights germane to control of liver infections.
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