过表达IDO不同分子轴调节骨髓间充质干细胞分泌外泌体通过DC及T细胞
1 云南中医药大学(昆明 650000);2 云南省第一人民医院心脏大血管外科(昆明 650000)
网络出版日期: 2022-01-10
基金资助
Exosome secreted by bone marrow mesenchymal stem cells overexpressing IDO regulating DC and T Cells through different molecular axes
目的 探讨过表达吲哚胺 2,3 双加氧酶(IDO)间充质干细胞分泌外泌体(BMSCIDO⁃exosome) 抑制T及DC细胞激活机制。方法 将BMSCIDO⁃exosome与DC、T细胞共培养设立为实验组。检测共培养DC 及 T 细胞内 miR⁃540⁃3p、CD74、CD28、CCL4、p⁃ERK1/2、p⁃NF⁃κB、p⁃AKT表达。验证miRNA⁃540⁃3p与CD74基 因的靶向结合。结果 实验组中 DC 细胞内 miR⁃540⁃3p 表达增高,CD74、p⁃p65 表达降低。T细胞内miR⁃ 540⁃3p表达增高,CD74、p⁃AKT表达降低。miRNA⁃540⁃3p与CD74 可以靶向结合。结论 BMSCIDO⁃exosome 通过 miRNA⁃540⁃3p(+)/CD74(-)/p⁃NF⁃κB 分子轴抑制 DC 细胞的激活。通过miRNA⁃540⁃3p(+)/CD74(-)/ p⁃AKT(-)分子轴抑制T细胞的激活。
关键词:
吲哚胺2
刘星佑 陈鑫昊 黄尹霞 李敏 撒亚莲 贺继刚
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过表达IDO不同分子轴调节骨髓间充质干细胞分泌外泌体通过DC及T细胞
Objective This study aimed to explore the mechanism of exosome secreted by bone mesenchy⁃ mal stem cells overexpressing IDO(BMSCIDO⁃exosome)inhibiting the activation of T and DC cells. Method The experimental group consisted of BMSCIDO⁃exosome was co⁃cultured with DC and T cells. In co⁃cultured DC and T cells,the expression of miR⁃540⁃3p,CD74,CD28,CCL4,p⁃ERK1/2,p⁃NF⁃κB,and p⁃AKT was detected. The targeted binding of miRNA⁃540⁃3p to CD74 gene was also verified. Results In the experimental group,miR⁃540⁃ 3p expression increased in DC cells while CD74 and p⁃p65 expression decreased. MiR⁃540⁃3p expression increased in T cells,while CD74 and p⁃AKT expression decreased. MiRNA⁃540⁃3p has been shown to bind specifically to CD74. Conclusions BMSCIDO⁃exosome could inhibit the activation of DC and T cells through the miRNA⁃540⁃3p (+)/CD74(-)/p⁃NF⁃κB molecular axis and the miRNA⁃540⁃3p(+)/CD74(-)/p⁃AKT(-)molecular axis,respec⁃ tively.
Key words:
indoleamine 2
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