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Wando Mount Pleasant Library
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Plasmacytoid dendritic cells mediate the tolerogenic effect of CD8+regulatory T cells in a rat tolerant liver transplantation model.
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- Author(s): Li, Han (AUTHOR); Zhou, Lin (AUTHOR); Jia, Ya-nan (AUTHOR); Wang, Ruo-ling (AUTHOR); Zhu, Ji-qiao (AUTHOR); Zhang, Xin-xue (AUTHOR); Xu, Wen-li (AUTHOR); Liu, Shao-yan (AUTHOR); He, Qiang (AUTHOR); Li, Xian-liang (AUTHOR)
- Source:
Transplant Immunology. Feb2022, Vol. 70, pN.PAG-N.PAG. 1p. - Source:
- Additional Information
- Subject Terms:
- Abstract: Tolerance is more easily induced in liver transplant models than in other organs; CD8+CD45RClowregulatory T cells (Tregs) have been shown to induce tolerance in heart allografts. Whether CD8+CD45RClowTregs could induce tolerance in a liver transplant model and how dendritic cells (DCs) mediate the CD8+CD45RClowTregs effect remains to be investigated. A rat liver transplantation model was established and used to test tolerance and acute rejection compared to control groups. Liver function and histopathological changes of allograft were examined by enzyme-linked immunosorbent assay (ELISA) and haematoxylin and eosin (H&E) staining, respectively. The distribution and proportion of CD8+CD45RClowTregs and plasmacytoid dendritic cells (pDCs) in the allografts and spleen were determined using flow cytometry. Cytokine secretion levels were determined using ELISA and real-time quantitative PCR (qRT-PCR). The rat liver transplantation model was well established, with a success rate of 93.3% (28/30). The mean survival time of the tolerant and acute-rejection rats were 156 and 14 days, respectively. The proportions of CD8+CD45RClowTegs were higher in the allografts of tolerant rats than in those of acute-rejection rats (33.1 ± 4.3 and 12.4 ± 4.6, respectively; P = 0.04). Significant accumulation of pDCs was observed in tolerant liver graft rats compared to that in acute-rejection rats (1.46 ± 0.23 and 0.80 ± 0.20, respectively; P = 0.02). Importantly, CD8+CD45RClowTregs were positively associated with the frequency of pDCs (P = 0.001, r2 = 0.775). The protein and mRNA expression of IL-10 and TGF-β in the allograft group were increased, possibly being responsible for tolerance induction. CD8+CD45RClowT cells interact with pDCs through the induction of IL-10 and TGF-β expression and are responsible for inducing immune tolerance in rat liver transplantation. • Immune tolerance induction is of great significance to transplant recipients. • CD8+Tregs have a powerful function of inducing immune tolerance. • CD8+Tregs induce the rat liver transplantation tolerance by interacting with pDCs. • CD8+CD45RClowTregs and pDCs are therapeutic potential in anti-transplant rejection. [ABSTRACT FROM AUTHOR]
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