CD27+ expression correlates with robust Ag-specific responses to M

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CD27+ expression correlates with robust Ag-specific responses to M CD27+ expression correlates with robust Ag-specific responses to M. bovis. CD27+ expression correlates with robust Ag-specific responses to M. bovis. Approximately 8 wk after virulent M. bovis infection, PBMCs (5 × 106 cells/ml) were labeled with CellTrace Violet and restimulated in vitro for 6 d in the presence or absence of PPD-b, ESAT-6/CFP-10 or left unstimulated. Cells were then labeled with anti-bovine CD4 or γδ TCR, and CD27. CellTrace dilution (proliferative responses) and CD27 cell surface expression was determined for (A) γδ T cells and (B) CD4 T cells (Supplemental Fig. 2). Data are presented as means ± SEM and are representative of one independent experiment.; n = 10. p values indicate differences between CellTrace dim and positive fractions for the respective T cell subset (i.e., comparisons between black and gray bars for each graph) as follows. *p < 0.05, **p < 0.01, ***p < 0.001, as determined by Student t test. Mariana Guerra-Maupome et al. ImmunoHorizons 2019;3:208-218 Copyright © 2019 The Authors