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. 2017 Nov 14;8:1508. doi: 10.3389/fimmu.2017.01508

Figure 4.

Figure 4

Interleukin-4 (IL-4) deficiency resulted in increased cell death and decreased granzyme expression in regulatory T cells (Tregs). (A) The schematic diagram shows the sorting strategy after culture by labeling Tregs with eFluor 670 cell proliferation dye. Tregs and responder T cells (Tresps) from IL-4 knockout (KO) and WT mice were prepared and cocultured 1:1 for 72 h. The IL-4 neutralization antibody or recombinant IL-4 was supplied as indicated. (B) The effect of anti-IL-4 on the cell death of Tregs and Tresps was determined by PI staining. (C–F) The differences of granzyme A and granzyme B expression levels were compared by real-time RT-PCR in Tregs from IL-4 KO or WT mice with supplementation of IL-4 neutralization antibody or recombinant IL-4. Data are representative of two independent experiments. Results are presented as the mean ± SEM (*p < 0.05, **p < 0.01; and ***p < 0.001).