Single cell multi-omics reveals early elevated function and multiple fates within human progenitor exhausted CD8+ T cells
Luciani, F.; Samir, J.; Leung, P.; Kedzierska, K.; Nguyen, T.; Lloyd, A.; Cai, C.; Bull, R.; Keoshkerian, E.; Eltahla, A.; Peters, T.; Gaudieri, S.; Gupta, M.; Adikari, T.; Louie, R.; Rizzetto, S.; Van der Byl, W.; Rasoli, M.; Palgen, J.-L.
Show abstract
T-cell exhaustion is a hallmark of hepatitis C virus (HCV) infection and limits protective immunity in chronic viral infections and cancer. Limited knowledge exists of the initial viral and immune dynamics that characterise exhaustion in humans. We studied longitudinal blood samples from a unique cohort of subjects with primary infection using single cell multi-omics to identify the functions and phenotypes of HCV-specific CD8+ T cells. Early elevated IFN-{gamma} response against the transmitted virus was associated with the rate of immune escape, larger clonal expansion, and early onset of exhaustion. Irrespective of disease outcome we discovered progenitors of early-exhaustion with intermediate expression of PD-1. Intra clonal analysis revealed distinct trajectories with multiple fates suggesting evolutionary plasticity of precursor cells. These findings challenge current paradigm on the contribution of CD8+ T cells to HCV disease outcome and provide data for future studies on T-cell differentiation in human infections. One sentence summaryProgenitors of T-cell exhaustion in acute HCV infection
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