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ERCs can suppress CD4+ T and CD8+ T cell populations through PD-L1. The proportion of CD4+ T and CD8+ T cells was detected by using FACS in different groups. A. Dot plots of CD4+ T and CD8+ T cells in vivo. B. Percentage of CD4+ T and CD8+ T cells in vivo (n=8 per group) and in vitro (n=6 per group). ERCs indicated ERCs-treated group. *ERCs indicated anti-PD-L1 antibody pretreated ERCs treatment. *P<0.05.
