Blimp-1 expression is enhanced in both si-tolerant T cells and CD3/CD155-ligated T cells. Blimp-1 expression is enhanced in both si-tolerant T cells and.

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Blimp-1 expression is enhanced in both si-tolerant T cells and CD3/CD155-ligated T cells. Blimp-1 expression is enhanced in both si-tolerant T cells and CD3/CD155-ligated T cells. (A) Heat map shows representative inhibitory surface molecule genes and transcription factors that are differentially expressed in activated T cells stimulated by CD3/CD155 ligation or CD3 single ligation (upper left and lower left). Right panels show representative inhibitory surface molecule genes (shown in Fig. 3B) and transcription factors that are differentially expressed in activated T cells (Activate T) and induced tolerant T cells (Si-tolerant). (B) Left, Prdm-1 mRNA expression was increased in CD3/CD155-ligated T cells. CD4+ naive T cells were stimulated by cross-linking for 48 h with anti-CD3 plus anti-CD155 or anti-CD3 plus control Ab. Right, Prdm-1 mRNA expression was also enhanced insi-tolerant T cells. Ac-N represents naive T cells under conventional culture with OVA stimulation for 24 h. Data are representative of three individual experiments with three mice (left) or four mice (right). (C) Left, Il-2 mRNA expression was increased in CD3/CD155-ligated T cells. Right, Il-2 mRNA expression was increased in si-tolerant T cells. (D) Prdm-1 mRNA expression was also increased in CD3/CD155-ligated T cells in TIGIT KO mice. The CD4+ naive T cells of WT or TIGIT KO mice were stimulated by double cross-linking of CD3 and CD155 or CD3 and control rat IgG for 48 h. (E) CD155-mediated signaling representing TIGIT. Prdm-1 expression was higher in WT stimulated T cells in coculture with WT CD3/CD155-ligated T cells than that with KO T cells. Upper, CD4 T cells from WT or TIGIT KO mice spleen were stimulated by CD3/CD155 ligation for 48 h. Then, these CD4+ T cells were cocultured in anti-CD3–coated plates with WT CD4+ naive T cells from GFP-Tg mice, which can be distinguished from pre-CD3/CD155–ligated T cells. After 48-h coculture, mRNA expressions of GFP+CD4+ T cells from each coculture group were examined. WT mix and KO mix show coculture with WT CD3/CD155-ligated T cells or KO ones, respectively. Lower, Tigit, Il-2 and Prdm-1 mRNA expressions in activated WT T cells cocultured with CD3/CD155-ligated T cells from WT or TIGIT KO mice. The graph is shown as mean ± SEM of three mice. Data are representative of two (D and E) or three (B and C) independent experiments with three mice per experiment. *p < 0.05,**p < 0.01, ***p < 0.001, unpaired Student t test, two-tailed (B and C), Tukey test (D and E). N.S., not significant. Naoko Negishi et al. ImmunoHorizons 2018;2:338-348 Copyright © 2018 The Authors