Journal article

High expression of CD38 and MHC class II on CD8 T cells during severe influenza disease reflects bystander activation and trogocytosis

Xiaoxiao Jia, Brendon Chua, Liyen Loh, Marios Koutsakos, Lukasz Kedzierski, Moshe Olshanski, William Heath, Jianqing Xu, Zhongfang Wang, Katherine Kedzierska

Cold Spring Harbor Laboratory | Published : 2021

Abstract

Although co-expression of CD38 and HLA-DR on CD8 + T cells reflects activation during influenza, SARS-CoV-2, Dengue, Ebola and HIV-1 viral infections, high and prolonged CD38 + HLA-DR + expression can be associated with severe and fatal disease outcomes. As the expression of CD38 + HLA-DR + is poorly understood, we used mouse models of influenza A/H7N9, A/H3N2 and A/H1N1 infection to investigate the mechanisms underpinning CD38 + MHC-II + phenotype on CD8 + T-cells. Our analysis of influenza-specific immunodominant D b NP 366 +CD8 + T-cell responses showed that CD38 + MHC-II + co-expression was detected on both virus-specific and bystander CD8 + T-cells, with increased numbers of both CD38 +..

View full abstract