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Donor BMSC-derived small extracellular vesicles relieve acute rejection post-renal allograft through transmitting Loc108349490 to dendritic cells
Aging Cell ( IF 8.0 ) Pub Date : 2021-09-09 , DOI: 10.1111/acel.13461
Zhi-Gang Wang 1 , Hong-En Xu 2 , Fu-Min Cheng 1 , Jie Zhang 1 , Yong-Hua Feng 1 , Dan-Hua Liu 2 , Wen-Jun Shang 1 , Gui-Wen Feng 1
Affiliation  

Bone marrow-derived mesenchymal stem cell (BMSC)-derived small extracellular vesicles (sEVs) are potent candidates for the suppression of acute rejection post-renal allograft and have been reported to halt dendritic cells (DCs) maturation. However, whether BMSC-derived sEVs mitigate acute rejection post-renal allograft by targeting DCs is still unclear. In this study, donor BMSC-derived sEVs (sEVs) relieved the inflammatory response and suppressed mature DCs (mDCs) location in kidney grafts, and increased regulatory T (Treg) cell population in the spleens of the rats that underwent kidney allograft. In lipopolysaccharide (LPS)-stimulated immature DCs (imDCs), sEVs suppressed the maturation and migration of DCs and inactivated toll-like receptor 4 (TLR4) signaling. Compared with LPS-treated imDCs, imDCs treated with LPS+sEVs promoted CD4+T cells differentiated toward Treg cells. Subsequently, we found that Loc108349490, a long non-coding RNA (lncRNA) abundant in sEVs, mediated the inhibitory effect of sEVs on DC maturation and migration by promoting TLR4 ubiquitination. In rats that underwent an allograft, Loc108349490 deficiency weakened the therapeutic effect of sEVs on acute rejection. The present study firstly found that sEVs alleviated acute rejection post-renal allograft by transferring lncRNA to DCs and screened out the functional lncRNA loaded in sEVs was Loc108349490.

中文翻译:


供体 BMSC 来源的小细胞外囊泡通过将 Loc108349490 传输至树突状细胞来缓解肾同种异体移植后的急性排斥反应



骨髓间充质干细胞 (BMSC) 衍生的小细胞外囊泡 (sEV) 是抑制肾同种异体移植后急性排斥反应的有效候选者,据报道可以阻止树突状细胞 (DC) 成熟。然而,BMSC 衍生的 sEV 是否通过靶向 DC 来减轻同种异体肾移植后的急性排斥反应仍不清楚。在这项研究中,供体 BMSC 衍生的 sEV (sEV) 缓解了肾移植物中的炎症反应并抑制了成熟 DC (mDC) 的定位,并增加了接受同种异体肾移植的大鼠脾脏中的调节性 T (Treg) 细胞群。在脂多糖 (LPS) 刺激的未成熟 DC (imDC) 中,sEV 抑制 DC 的成熟和迁移,并灭活 Toll 样受体 4 (TLR4) 信号传导。与LPS处理的imDC相比,LPS+sEV处理的imDC促进CD4 + T细胞向Treg细胞分化。随后,我们发现Loc108349490,一种在sEV中丰富的长非编码RNA(lncRNA),通过促进TLR4泛素化介导sEV对DC成熟和迁移的抑制作用。在接受同种异体移植的大鼠中,Loc108349490 缺陷削弱了 sEV 对急性排斥反应的治疗作用。本研究首次发现sEVs通过将lncRNA转移至DC来减轻同种异体肾移植后的急性排斥反应,并筛选出sEVs中加载的功能性lncRNA为Loc108349490。
更新日期:2021-10-17
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