Abstract
Activation of endogenous neural stem cells (NSC) is one of the most potential measures for neural repair after spinal cord injury. However, methods for regulating neural stem cell behavior are still limited. Here, we investigated the effects of nicotinamide riboside promoting the proliferation of endogenous neural stem cells to repair spinal cord injury. Nicotinamide riboside promotes the proliferation of endogenous neural stem cells and regulates their differentiation into neurons. In addition, nicotinamide riboside significantly restored lower limb motor dysfunction caused by spinal cord injury. Nicotinamide riboside plays its role in promoting the proliferation of neural stem cells by activating the Wnt signaling pathway through the LGR5 gene. Knockdown of the LGR5 gene by lentivirus eliminates the effect of nicotinamide riboside on the proliferation of endogenous neural stem cells. In addition, administration of Wnt pathway inhibitors also eliminated the proliferative effect of nicotinamide riboside. Collectively, these findings demonstrate that nicotinamide promotes the proliferation of neural stem cells by targeting the LGR5 gene to activate the Wnt pathway, which provides a new way to repair spinal cord injury.
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Acknowledgements
This work was supported by the National Key Research and Development Project of Stem Cell and Transformation Research (2019YFA0112100); National Natural Science Foundation of China (82102560, 82220108005) Tian** key research and development plan, key projects for science and technology support (19YFZCSY00660); The Scientific Research Program of Tian** Education Commission (2022KJ239). Clinical Research Center of Shandong University (No.2020SDUCRCA008). We thank Translational Medicine Core Facility of Shandong University for consultation and instrument availability that supported this work.
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J.Z., J.S. and N.R. designed the project. J.Z., J.S., Z.Y., Z.L., W.L., H.Z., Y.L. and H.D. performed the experiments. Z.P, N.R, H.Z. and S.F. discussed the results. J.Z, N.R., wrote the manuscript. S.F, N.R and Z.W. revised the manuscript. All authors read and approved the final version of the manuscript.
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The animal study was reviewed and approved by the Ethics Committee of the Institute of Tian** Medical University General Hospital (approval number: IRB2022-DW-46) and performed according to the national guidelines for laboratory animal use and care. All methods were performed in accordance with the relevant guidelines and regulations.
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Zhang, J., Shang, J., Ding, H. et al. Nicotinamide Riboside Promotes the Proliferation of Endogenous Neural Stem Cells to Repair Spinal Cord Injury. Stem Cell Rev and Rep (2024). https://doi.org/10.1007/s12015-024-10747-x
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DOI: https://doi.org/10.1007/s12015-024-10747-x