Fig. 6

HPVnegVSCC are infiltrated with activated and Tbet-expressing CD4+ and CD8+ T cells and Tregs. PBMC of healthy controls (nā=ā12) and PBMC (nĀ =ā34) and freshly dispersed tumors (nĀ =ā6) of HPVnegVSCC patients were analyzed by 13-parameter flow cytometry analysis. Scatter plots with bars displaying (a) frequencies of total Foxp3+ Tregs (left) and proliferating (Ki67+; middle) and Foxp3hi activated Tregs (Foxp3hi aTregs; right) within CD3+ T cells and (b) frequencies of Tbet+ (top), Tim-3+ (middle) and Lag-3+ (bottom) cells within the CD8+ (left), non-Treg CD4+ (middle) and Foxp3+ Treg (right) T cell populations. (*pĀ <ā0.05, **pĀ <ā0.01, ***pĀ <ā0.001 and ****pĀ <ā0.0001)