Figure 1. A proportion of natural CD25⁺ from patients, but not healthy donors, can sustain or up-regulate CD25 expression following in vitro HCV peptide stimulation.

(A) The CFSE-CD25⁺/CD25⁻ co-cultures were stimulated with the HCV peptide pool and analysed on day 5, gating on lymphocytes. The number in the upper right corner indicates the percentage of CD25⁺ cells within the total CFSE⁺ population. (Representative data of N = 5 patients and N = 4 healthy donors). (B) Summary of data from all donors. P value was calculated using student T test.