Abstract

Macrophage/microglia polarization acts as an important part in regulating inflammatory responses in spinal cord injury (SCI). However, the regulation of inflammation of Schwann cell-derived exosomes (SCDEs) for SCI repair is still unclear. Therefore, we intend to find out the effect of SCDEs on regulating the inflammation related to macrophage polarization during the recovery of SCI. Firstly, the thesis demonstrated that SCDEs could attenuate the LPS- inflammation in BMDMs by suppressing M1 polarization and stimulating M2 polarization. Similarly, SCDEs improved functional recovery of female Wistar rats of the SCI contusion model according to BBB (Basso, Beattie, and Bresnahan) score, electrophysiological assay, and the gait analysis system of CatWalk XT. Moreover, MFG-E8 was verified as the main component of SCDEs to improve the inflammatory response by proteomic sequencing and lentiviral transfection. Improvement of the inflammatory microenvironment also inhibited neuronal apoptosis. The knockout of MFG-E8 in SCs can reverse the anti-inflammatory effects of SCDEs treatment. The SOCS3/STAT3 signaling pathway was identified to participate in upregulating M2 polarization induced by MFG-E8. In conclusion, our findings will enrich the mechanism of SCDEs in repairing SCI and provide potential applications and new insights for the clinical translation of SCDEs treatment for SCI.

Details

Title
Schwann cell-derived exosomes containing MFG-E8 modify macrophage/microglial polarization for attenuating inflammation via the SOCS3/STAT3 pathway after spinal cord injury
Author
Ren, Jie 1 ; Zhu, Bin 1 ; Gu, Guangjin 1 ; Zhang, Wencan 2 ; Li, Junjin 1 ; Wang, Hongda 1 ; Wang, Min 3 ; Song, Xiaomeng 1 ; Wei, Zhijian 4 ; Feng, Shiqing 4   VIAFID ORCID Logo 

1  Tianjin Medical University General Hospital, National Spinal Cord Injury International Cooperation Base, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin, China (GRID:grid.412645.0) (ISNI:0000 0004 1757 9434) 
2  Shandong University, Department of Orthopedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopedics, Advanced Medical Research Institute, Jinan, China (GRID:grid.27255.37) (ISNI:0000 0004 1761 1174) 
3  Tianjin Medical University General Hospital, Tianjin Key Laboratory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Tianjin, China (GRID:grid.412645.0) (ISNI:0000 0004 1757 9434) 
4  Tianjin Medical University General Hospital, National Spinal Cord Injury International Cooperation Base, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin, China (GRID:grid.412645.0) (ISNI:0000 0004 1757 9434); Shandong University, Department of Orthopedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopedics, Advanced Medical Research Institute, Jinan, China (GRID:grid.27255.37) (ISNI:0000 0004 1761 1174) 
Pages
70
Publication year
2023
Publication date
Jan 2023
Publisher
Springer Nature B.V.
e-ISSN
20414889
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41419-023-05607-4
ProQuest document ID
2770823780
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.