Figure 4. Regulatory T cells (Treg) in the peripheral blood and phenotype of dendritic cells.
(a) Treg were defined as CD4+CD39+CD25+ cells by flow cytometry, which are regularly identified as a defined population. (b) Percentages of CD4+CD39+CD25+ Treg in the peripheral blood of patients (n=16) before and after vaccination. Wilcoxon paired signed-rank test **p = 0.006. (c) Absolute numbers of CD4+CD39+CD25+ Treg in the peripheral blood of patients (n=16) before and after vaccination. Wilcoxon paired signed-rank test **p = 0.005. (d) The frequency of Treg in the peripheral circulation inversely correlates to the absolute number of CD4+ T cells (R2 = −0.6, p < 0.01). Upper and lower lines denote 95% confidence interval.