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Transplantation of olfactory mucosa mesenchymal stromal cells repairs spinal cord injury by inducing microglial polarization

Study design Animal studies Objectives To evaluate the therapeutic effect of olfactory mucosa mesenchymal stem cell (OM-MSCs) transplantation in mice with spinal cord injury (SCI) and to explore the mechanism by which OM-MSCs inhibit neuroinflammation and improve SCI. Setting Xiangya Hospital, Centr...

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Bibliographic Details
Published in:Spinal cord 2024-08, Vol.62 (8), p.429-439
Main Authors: Wang, Xin, Hong, Chun-Gu, Duan, Ran, Pang, Zhi-Lin, Zhang, Min-Na, Xie, Hui, Liu, Zheng-Zhao
Format: Article
Language:English
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Summary:Study design Animal studies Objectives To evaluate the therapeutic effect of olfactory mucosa mesenchymal stem cell (OM-MSCs) transplantation in mice with spinal cord injury (SCI) and to explore the mechanism by which OM-MSCs inhibit neuroinflammation and improve SCI. Setting Xiangya Hospital, Central South University; Affiliated Hospital of Guangdong Medical University. Methods Mice (C57BL/6, female, 6-week-old) were randomly divided into sham, SCI, and SCI + OM-MSC groups. The SCI mouse model was generated using Allen’s method. OM-MSCs were immediately delivered to the lateral ventricle after SCI using stereotaxic brain injections. One day prior to injury and on days 1, 5, 7, 14, 21, and 28 post-injury, the Basso Mouse Scale and Rivlin inclined plate tests were performed. Inflammation and microglial polarization were evaluated using histological staining, immunofluorescence, and qRT-PCR. Results OM-MSCs originating from the neuroectoderm have great potential in the management of SCI owing to their immunomodulatory effects. OM-MSCs administration improved motor function, alleviated inflammation, promoted the transformation of the M1 phenotype of microglia into the M2 phenotype, facilitated axonal regeneration, and relieved spinal cord injury in SCI mice. Conclusions OM-MSCs reduced the level of inflammation in the spinal cord tissue, protected neurons, and repaired spinal cord injury by regulating the M1/M2 polarization of microglia.
ISSN:1362-4393
1476-5624
1476-5624
DOI:10.1038/s41393-024-01004-6