Figure 2.

Expression of co-stimulated molecules on CXCR5⁺ CD8⁺ memory T cells from tonsils, lymph nodes and PBMCs. Upon stimulation with CD3/CD28 dynabeads for 8 h, the expression of CD40L and ICOS on CXCR5⁺ and CXCR5⁻ CD8⁺ memory T cells from tonsils, lymph nodes and PBMCs was detected by flow cytometry (A,B). The data are representative of thirteen or fifteen independent experiments, and were analyzed by two-tailed unpaired t-test (C). Error bar denote s.e.m. *P < 0.05, **P < 0.01, and ***P < 0.001. ns, no significance.