Peripheral blood mononuclear cells were isolated from patients prior to,
during, and post treatment, and assessed for immune composition and function by
20-color flow cytometry. A) Proliferation of proliferating CD8 and
CD4 T effector cells was analyzed by Ki-67 expression B) Percentage
of exhausted PD-1+ LAG-3+ CD8 T cells. C,D)
Arginase expression was measured in C) immune suppressive PMN and
Mo myeloid-derived suppressor cells, and in D) dendritic cells and
monocyte-derived dendritic cells. E) Percent of dendritic cells and
monocyte-derived dendritic cells expressing PD-L1 was also measured. ns, not
significant; *, P < 0.05; **, P
< 0.01; ***, P < 0.001; ****, P
< 0.0001 by two-way ANOVA (Sidak’s multiple comparisons test)