中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (3): 821-835.doi: 10.4103/NRR.NRR-D-23-01446

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

重复创伤性脑损伤诱导补体相关炎症可损害海马齿状回的长期神经发生

  

  • 出版日期:2025-03-15 发布日期:2024-06-26
  • 基金资助:
    山西省基础研究计划项目(20210302124277),山西白求恩医院科学基金项目(2021YJ13)

Repetitive traumatic brain injury–induced complement C1–related inflammation impairs long-term hippocampal neurogenesis

Jing Wang1, 2, Bing Zhang3, 4, Lanfang Li3, 4, Xiaomei Tang3, 4, Jinyu Zeng3, 4, Yige Song3, 4, Chao Xu5, Kai Zhao1, Guoqiang Liu6, Youming Lu3, 4, Xinyan Li3, 4, 7, *, Kai Shu1, *   

  1. 1Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China; 2Department of Neurosurgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China; 3Department of Pathophysiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China; 4Institute for Brain Research, Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, Hubei Province, China; 5Department of Graduate Student, Chongqing Medical University, Chongqing, China; 6Department of Basic Medicine, School of Medical Science, Hubei University for Nationalities, Enshi, Hubei Province, China; 7Department of Anatomy, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
  • Online:2025-03-15 Published:2024-06-26
  • Contact: Kai Shu, MD, PhD, kshu@tjh.tjmu.edu.cn; Xinyan Li, MD, PhD, lixinyan1026@163.com.
  • Supported by:
    This work was supported by the Fundamental Research Program of Shanxi Province of China, No. 20210302124277 and the Science Foundation of Shanxi Bethune Hospital, No. 2021YJ13 (both to JW).

摘要:

重复创伤性脑损伤会影响海马齿状回中成年神经发生,从而导致远期认知障碍。然而,这种神经发生障碍的机制仍不清楚。实验建立了实验性重复创伤性脑损伤雄性小鼠模型,并对损伤后海马齿状回的神经发生进行了长期评估。结果发现,重复创伤性脑损伤后远期抑制神经干细胞增殖和发育,延缓神经元成熟,并降低神经元树突和棘突复杂性,这一发现很可能与异常神经网络的形成和空间记忆检索障碍相吻合。此外,在神经发生微环境中,重复创伤性脑损伤后神经炎症反应增强,补体C1q水平升高,C1qBP 的表达降低,经典Wnt/b-catenin信号受到抑制。C1抑制剂则可逆转上述重复创伤性脑损伤引起的神经发生的长期损害,并改善神经功能。上述结果表明,重复创伤性脑损伤诱导的C1相关炎症可损害海马齿状回的长期神经发生,并导致持续的空间记忆检索障碍。

https://orcid.org/0000-0002-7275-7315 (Kai Shu); https://orcid.org/0000-0001-5770-8315 (Xinyan Li)

关键词: 创伤性脑损伤, 神经发生, 神经干细胞, 海马, 齿状回, 补体C1, 神经炎症, 神经元, 树突, 神经功能

Abstract: Repetitive traumatic brain injury impacts adult neurogenesis in the hippocampal dentate gyrus, leading to long-term cognitive impairment. However, the mechanism underlying this neurogenesis impairment remains unknown. In this study, we established a male mouse model of repetitive traumatic brain injury and performed long-term evaluation of neurogenesis of the hippocampal dentate gyrus after repetitive traumatic brain injury. Our results showed that repetitive traumatic brain injury inhibited neural stem cell proliferation and development, delayed neuronal maturation, and reduced the complexity of neuronal dendrites and spines. Mice with repetitive traumatic brain injuryalso showed deficits in spatial memory retrieval. Moreover, following repetitive traumatic brain injury, neuroinflammation was enhanced in the neurogenesis microenvironment where C1q levels were increased, C1q binding protein levels were decreased, and canonical Wnt/β-catenin signaling was downregulated. An inhibitor of C1 reversed the long-term impairment of neurogenesis induced by repetitive traumatic brain injury and improved neurological function. These findings suggest that repetitive traumatic brain injury–induced C1-related inflammation impairs long-term neurogenesis in the dentate gyrus and contributes to spatial memory retrieval dysfunction.

Key words: complement C1, dendrite, dentate gyrus, hippocampus, neural stem cell, neurogenesis, neuroinflammation, neurological function, neuron, traumatic brain injury