中国神经再生研究(英文版) ›› 2024, Vol. 19 ›› Issue (6): 1375-1384.doi: 10.4103/1673-5374.385843

• 原著:退行性病与再生 • 上一篇    下一篇

TREM-1可介导脑内黑质小胶质细胞和外周中性粒细胞的相互作用

  

  • 出版日期:2024-06-15 发布日期:2023-11-18

TREM-1 mediates interaction between substantia nigra microglia and peripheral neutrophils

Tong Shen1, 2, 3, 4, Guiyun Cui4, Hao Chen4, Long Huang1, 2, 3, Wei Song1, 2, 3, Jie Zu4, Wei Zhang4, Chuanying Xu4, Liguo Dong4, Yongmei Zhang1, 2, 3, *#br#   

  1. 1Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu Province, China; 2Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology, Xuzhou Medical University, Xuzhou, Jiangsu Province, China; 3NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou, Jiangsu Province, China; 4Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
  • Online:2024-06-15 Published:2023-11-18
  • Contact: Yongmei Zhang, PhD, zhangym700@163.com.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, Nos. 82271257 (to YZ) and 82071228 (to YZ), Qing Lan Project (to YZ), Open Competition Grant of Xuzhou Medical University (to YZ) and Postgraduate Research & Practice Innovation Program of Jiangsu Province, No. KYCX21_2705 (to TS).

摘要:

小胶质细胞介导的神经炎症被认为是帕金森病的病理特征之一,而髓系细胞触发受体1(triggering receptor expressed on myeloid cells-1,TREM-1)可以放大固有的免疫反应,对炎症起到关键的调节作用。实验首先发现帕金森病患者血清可溶性TREM-1水平上调,且其水平与疾病严重程度和运动障碍强度呈正相关。而后在1,2,3,6-四氢-1-甲基-4-苯基吡啶诱导的帕金森病小鼠模型中发现,其黑质小胶质细胞中TREM-1表达也出现显著上调,且敲除TREM-1可减轻帕金森病小鼠的运动障碍以及多巴胺能神经元损伤,并减弱了其神经炎症反应以及中性粒细胞侵袭。然后在体外以1-甲基-4-苯基-吡啶诱导BV2小胶质细胞建立体外帕金森病模型,然后以TREM-1抑制肽LP17进行干预,可见可减少多巴胺能神经元凋亡以及中性粒细胞迁移。此外,抑制TREM-1的中性粒细胞可减少脂多糖诱导的多巴胺能神经元凋亡。此外,TREM-1还能通过与SYK相互作用激活下游CARD9/核因子κB促炎通路。因此提示,TREM-1可通过调节小胶质细胞和外周中性粒细胞之间的相互联系,在介导帕金森病多巴胺能神经元损伤中发挥关键的作用。

https://orcid.org/0000-0002-0919-904X (Yong-mei Zhang)

关键词: 帕金森病, 小胶质细胞, 中性粒细胞, 浸润, TREM-1, SYK, 多巴胺能神经元, 神经炎症

Abstract: Microglia-mediated neuroinflammation is considered a pathological feature of Parkinson’s disease. Triggering receptor expressed on myeloid cell-1 (TREM-1) can amplify the inherent immune response, and crucially, regulate inflammation. In this study, we found marked elevation of serum soluble TREM-1 in patients with Parkinson’s disease that positively correlated with Parkinson’s disease severity and dyskinesia. In a mouse model of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Parkinson’s disease, we found that microglial TREM-1 expression also increased in the substantia nigra. Further, TREM-1 knockout alleviated dyskinesia in a mouse model of Parkinson’s disease and reduced dopaminergic neuronal injury. Meanwhile, TREM-1 knockout attenuated the neuroinflammatory response, dopaminergic neuronal injury, and neutrophil migration. Next, we established an in vitro 1-methyl-4-phenyl-pyridine-induced BV2 microglia model of Parkinson’s disease and treated the cells with the TREM-1 inhibitory peptide LP17. We found that LP17 treatment reduced apoptosis of dopaminergic neurons and neutrophil migration. Moreover, inhibition of neutrophil TREM-1 activation diminished dopaminergic neuronal apoptosis induced by lipopolysaccharide. TREM-1 can activate the downstream CARD9/NF-κB proinflammatory pathway via interaction with SYK. These findings suggest that TREM-1 may play a key role in mediating the damage to dopaminergic neurons in Parkinson’s disease by regulating the interaction between microglia and peripheral neutrophils.

Key words: 1-methyl-4-phenylpyridiniumion, dopaminergic neurons, infiltration, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, microglia, neutrophils, neuroinflammation, Parkinson’s disease, SYK, TREM-1