miR-143 Regulates Memory T Cell Differentiation by Reprogramming T Cell Metabolism

The Journal of Immunology : Official Journal of the American Association of Immunologists
Tengfei ZhangYi Zhang

Abstract

MicroRNAs are an important regulator for T cell immune response. In this study, we aimed to identify microRNAs with the potential to regulate T cell differentiation. The influence of miR-143 on differentiation and function of CD8+ T cells from healthy donors were detected, and it was found that miR-143 overexpression could significantly increase the differentiation of central memory T (Tcm) CD8+ cells, decrease cell apoptosis, and increase proinflammatory cytokine secretion. Furthermore, the specific killing of HER2-CAR T cells against esophageal cancer cell line TE-7 was enhanced by miR-143 overexpression. Glucose transporter 1 (Glut-1) was identified as the critical target gene of miR-143 in the role of T cell regulation. By inhibition Glut-1, miR-143 inhibited glucose uptake and glycolysis in T cell to regulated T cell differentiation. Tcm cell populations were also suppressed in parallel with the downregulation of miR-143 in tumor tissues from 13 patients with esophagus cancer. IDO and its metabolite kynurenine in the tumor microenvironment were screened as an upstream regulator of miR-143. IDO small interfering RNA significantly increased the expression of miR-143 and Tcm cell population. In conclusion, our results show th...Continue Reading

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