Immunomodulatory mechanism of umbilical cord mesenchymal stem cells modified by miR-125b-5p in systemic lupus erythematosus

  • Zhihui WU ,
  • Mingzhi HU ,
  • Qiaoying ZHAO ,
  • Fengfeng LV ,
  • Jingying ZHANG ,
  • Wei ZHANG ,
  • Yongfu WANG ,
  • Xiaolin SUN ,
  • Hui WANG
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  • 1. Central Laboratory, First Affiliated Hospital of Baotou Medical College (Inner Mongolia Key Laboratory of Autoimmunology), Baotou 014010, Inner Mongolia Autonomous Region, China
    2. Department of Rheumatism and Immunology, First Affiliated Hospital of Baotou Medical College, Baotou 014010, Inner Mongolia Autonomous Region, China
SUN Xiaolin, e-mail, yolo_1010@126.com
WANG Hui, e-mail, wanghuier@126.com

Received date: 2021-07-26

  Online published: 2024-10-16

Supported by

Supported by the National Natural Science Foundation of China(81860294);Supported by the National Natural Science Foundation of China(81860295);the Natural Science Foundation of Inner Mongolia(2019MS08055);the Inner Mongolia Autonomous Region Science and Technology Plan Projects(201802089);the Inner Mongolia Autonomous Region Science and Technology Plan Projects(2019GG052)

Copyright

, 2024, All rights reserved, without authorization

Abstract

Objective: To investigate the mechanism of immunomodulatory effects of umbilical cord mesenchymal stem cells (UC-MSCs) modified by miR-125b-5p on systemic lupus erythematosus (SLE). Methods: The expression level of miR-125b-5p was detected by real-time fluorescence quantitative PCR in UC-MSCs and peripheral blood mononuclear cells (PBMCs) from SLE patients and health checkers. Annexin V-FITC/PI apoptosis detection kit was used to detect the effect of miR-125b-5p on apoptosis of UC-MSCs. MRL/lpr mice in each group were injected with UC-MSCs via tail vein, and T-lymphocyte subsets in the spleen of the MRL/lpr mice were detected by flow cytometry after 5 weeks. The expression levels of interleukin (IL)-4 and IL-17A in serum of MRL/lpr mice were detected by ELISA. Hematoxylin-eosin staining was used to observe the pathological manifestations of the lungs and kidneys of the MRL/lpr mice. Results: miR-125b-5p was significantly down-regulated in PBMCs of SLE patients compared with healthy controls (P < 0.01). Compared with the UC-MSCs group, the expression of miR- 125b-5p in UC-MSCs modified by miR-125b-5p group was increased (P < 0.01). The survival rate of UC-MSCs was significantly increased by miR-125b-5p (P < 0.01). Compared with the untreated group of MRL/lpr mice, the expression level of IL-4 in serum was increased (P < 0.05); the expression level of IL-17A was decreased (P < 0.05); the proportion of Th17 cells in the spleen of MRL/lpr mice was decreased (P < 0.05); the inflammatory cells infiltration and micro-thrombosis of lungs and kidneys of MRL/lpr mice were significantly reduced in the UC-MSCs modified by miR-125b-5p treatment group. Conclusion: UC-MSCs modified by miR-125b-5p have immunomodulatory effects on systemic lupus erythematosus.

Cite this article

Zhihui WU , Mingzhi HU , Qiaoying ZHAO , Fengfeng LV , Jingying ZHANG , Wei ZHANG , Yongfu WANG , Xiaolin SUN , Hui WANG . Immunomodulatory mechanism of umbilical cord mesenchymal stem cells modified by miR-125b-5p in systemic lupus erythematosus[J]. Journal of Peking University(Health Sciences), 2024 , 56(5) : 860 -867 . DOI: 10.19723/j.issn.1671-167X.2024.05.017

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