中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (1): 213-218.doi: 10.4103/1673-5374.343885

• 原著:神经再生技术 • 上一篇    下一篇

多系分化持续应激细胞通过调节体外M1/M2小胶质细胞减轻神经炎症反应

  

  • 出版日期:2023-01-15 发布日期:2022-06-17
  • 基金资助:

    国自然青年项目(81501610);无锡市科技局课题(N20202030N20192025江苏省研究生科研与实践创新计划(KYCX20_1960

Muse cells decrease the neuroinflammatory response by modulating the proportion of M1 and M2 microglia in vitro

Xin-Yao Yin1, Chen-Chun Wang1, Pan Du1, Xue-Song Wang2, Yi-Chi Lu1, Yun-Wei Sun1, Yue-Hui Sun1, Yi-Man Hu1, Xue Chen1, *   

  1. 1Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu Province, China; 2Department of Orthopedics, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu Province, China
  • Online:2023-01-15 Published:2022-06-17
  • Contact: Xue Chen, PhD, snow@jiangnan.edu.cn.
  • Supported by:
    The study was supported by the National Natural Science Foundation of China, No. 81501610 (to XC); a grant for Development of Science and Technology of Wuxi, Nos. N20202030 (to XC), N20192025 (to XSW); Postgraduate Research & Practice Innovation Program of Jiangsu Province, No. KYCX20_1960 (to XYY).

摘要:

神经炎症的存在一直是阻碍中枢神经系统(CNS)修复的一个主要问题。在以往关于中枢神经系统损伤治疗的研究中,人们发现干细胞移植是一种非常有前景的方法;然而,选择一种既能促进中枢神经组织再生又能改善微环境的种子细胞仍是一个难题。实验从骨髓间充质干细胞(BMSCs)中分离出了多系分化持续应激细胞Muse细胞。通过将Muse细胞与脂多糖(LPS)刺激的小胶质细胞共同培养,在体外探索了Muse细胞的抗炎作用和机制。结果显示,Muse细胞能有效降低小胶质细胞中肿瘤坏死因子α和白细胞介素1β的转录和分泌水平,并提高肿瘤坏死因子β的转录水平,同时伴有白细胞介素10的分泌增加。此外,在炎症环境下,Muse细胞比骨髓间充质干细胞更有效地降低了M1小胶质细胞的比例和提高M2小胶质细胞的表达。实验还发现,Muse细胞可以抑制TLR4、MyD88的蛋白表达以及小胶质细胞中p65,IκBα和p38的磷酸化蛋白表达。因此,Muse细胞的抗神经炎症作用可能是通过抑制小胶质细胞中的TLR4/MyD88/NF-κB和p38 MAPK信号通路实现的。这些结果阐明了Muse细胞在中枢神经系统疾病中应用的功能和分子基础,并为种子细胞的选择提供了启示。

https://orcid.org/0000-0003-4766-232X (Xue Chen)

Abstract: Neuroinflammation hinders repair of the central nervous system (CNS). Stem cell transplantation is a very promising approach for treatment of CNS injuries. However, it is difficult to select seed cells that can both facilitate nerve regeneration and improve the microenvironment in the CNS. In this study, we isolated multilineage-differentiating stress-enduring (Muse) cells from bone marrow mesenchymal stem cells. We explored the anti-inflammatory effect and mechanism of Muse cells in vitro by coculture of Muse cells with lipopolysaccharide-stimulated microglia. Our results showed that Muse cells effectively reduced the transcription and secretion of tumor necrosis factor α and interleukin-1β and increased the expression of transforming growth factor-β and interleukin-10 in microglia. In addition, Muse cells decreased the number of M1 microglia and increased the proportion of M2 microglia in an inflammatory environment more effectively than bone marrow mesenchymal stem cells. We also show that Muse cells inhibited the protein expression of toll-like receptor 4 (TLR4) and myeloid differentiation primary response protein (MyD88) and inhibited the expression of the phosphorylated forms of transcription factor p65, nuclear factor (NF)-κB inhibitor alpha, and p38 mitogen-activated protein kinase (MAPK) in microglia. Therefore, we suggest Muse cells cause antineuroinflammatory effects by inhibition of the TLR4/MyD88/NF-κB and p38 MAPK signaling pathways in microglia. Our results shed light on the function of Muse cells in relation to CNS diseases and provide insight into the selection of seed cells.

Key words: bone marrow mesenchymal stem cells, central nervous system, lipopolysaccharide, multilineage-differentiating stress-enduring cells, neuroinflammation, microglia, signaling pathway