Inhibition of miR-let-7i Induces DC Immature Cells and Improves Skin Graft Tolerance.

Inhibition of miR-let-7i Induces DC Immature Cells and Improves Skin Graft Tolerance.
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抑制 miR-let-7i 诱导 DC 未成熟细胞并提高植皮耐受性

DOI:
10.1155/2022/8605621
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Chen, Peng
Chen, Peng
中科院分区:
医学4区
文献类型:
--
作者:
Zheng, Zhibin;Yang, Yurou;Liu, Hai;Hu, Mingdao;Chen, Peng

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树突状细胞(DC)启动体内的免疫反应。它们可以刺激T细胞活化、增殖和分化,并最终参与免疫应答和免疫耐受应答。本研究旨在将DC与T细胞共培养,并将miR-let-7i转染的DC皮下注射到恒河猴移植物中,以验证miR-let-7i在同种异体移植免疫耐受中的作用。体外研究发现,诱导DCs成熟后,miR-let-7i的表达上调。miR-let-7i的低表达可抑制DC的成熟,促进T细胞向辅助性T细胞2(Th 2)分化,抑制辅助性T细胞1-(Th 1-)驱动的排斥反应。体内研究也获得了类似的结果,皮下注射转染miR-let-7i抑制剂的DC延长了同种异体皮肤移植的存活时间。因此,我们得出结论,miR-let-7i的抑制抑制DC成熟并提高移植皮肤的耐受性。
Dendritic cells (DC) initiate the immune response in the body. They can stimulate T cell activation, proliferation, and differentiation and ultimately participate in the immune response and the immune tolerance response. The purpose of this study was to coculture DCs and T cells and subcutaneously inject DCs transfected with miR-let-7i into rhesus monkey transplantations to verify the role of miR-let-7i in allograft immune tolerance. In vitro studies found that the expression of miR-let-7i was upregulated after inducing the maturation of DCs. The low expression of miR-let-7i inhibited the maturation of DCs, promoted the differentiation of T cells into T helper T cells 2 (Th2), and inhibited T helper T cell 1- (Th1-) driven rejection. In vivo studies also obtained similar results, and subcutaneous injection of DCs transfected with miR-let-7i inhibitor prolonged the survival time of allogeneic skin transplantation. Therefore, we conclude that inhibition of miR-let-7i inhibits DC maturation and improves the tolerance of grafted skin.
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