中国神经再生研究(英文版) ›› 2026, Vol. 21 ›› Issue (9): 4297-4310.doi: 10.4103/NRR.NRR-D-24-01153

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

低强度聚焦超声介导的创伤性脑损伤血管生成和神经发生的机制

  

  • 出版日期:2026-09-15 发布日期:2026-05-21
  • 基金资助:
    国家自然科学基金(82472604,82160437),江西省自然科学基金重点项目(20232ACB206012),江西省临床重点研究中心(20212BCG74005)

Mechanism by which low-intensity focused ultrasound promotes angiogenesis and neurogenesis after traumatic brain injury in a rat model via the OXA/MAPK signaling pathway

Bingkai Ren1, 2, 3, 4, #, Junwei Kang4, #, Peng Yao1, 2, 3, #, Lianghua Huang1, 2, 3, Yan Wang1, 2, 3, Yang Bai1, 2, 3, *, Zhen Feng1, 2, 3, *   

  1. 1Affiliated Rehabilitation Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi Province, China; 
    2Rehabilitation Medicine Clinical Research Center of Jiangxi Province, Nanchang, Jiangxi Province, China; 
    3Key Laboratory of Jiangxi Provincial Health Commission for DOC Rehabilitation, Nanchang, Jiangxi Province, China; 
    4Department of Rehabilitation Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
  • Online:2026-09-15 Published:2026-05-21
  • Contact: Zhen Feng, MS, fengzhen@email.ncu.edu.cn; Yang Bai, MS, baiyang_nanchang@163.com.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, Nos. 82472604, 82160437; Key Research and Development Fund Project in Jiangxi Province, No. 20232ACB206012; and a grant from Rehabilitation Medicine Clinical Medical Research Center of Jiangxi Province, No. 20212BCG74005 (all to ZF).

摘要:

低强度聚焦超声是超声波的一种形式,其主要依靠空化和机械效应发挥作用,具有无创、短暂、耐受良好的特点。既往研究已证实低强度聚焦超声能改减轻创伤性脑损伤后神经炎症,并发挥神经保护作用。但其是否也具有诱导脑血管生成和神经发生作用及其机制,尚不明确。此次临床前研究以受控皮质撞击装置诱导建立大鼠创伤性脑损伤模型,而后针对损伤区域进行连续14d的低强度聚焦超声。结果显示低强度聚焦超声可有效减轻创伤性脑损伤大鼠的脑水肿以及血脑屏障损伤,进而改善其神经功能。进一步研究显示,低强度聚焦超声可显著上调Orexin-A/Orexin-A受体1的表达,且腹腔注射Orexin-A受体1抑制剂SB334867可抑制低强度聚焦超声的神经功能保护作用。而后的转录组测序发现低强度聚焦超声还可激活MAPK信号通路。最后在肿瘤坏死因子α构建体外细胞损伤模型中发现,低强度聚焦超声可促进内皮细胞迁移、血管生成、海马神经元迁移和生长,且MAPK信号通路重要因子ERK1/2的抑制剂LY3214996能抑制上述作用。因此实验结果表明,低强度聚焦超声可通过调控Orexin-A/Orexin-A受体1的表达,激活MAPK信号通路,进而发挥促进血管新生,神经再生和改善创伤性脑损伤神经功能的作用。


https://orcid.org/0000-0003-2201-7797 (Zhen Feng); 

https://orcid.org/0000-0002-1935-0612 (Yang Bai)

关键词: 低强度聚焦超声, 创伤性脑损伤, 神经修复, 神经功能, 血管生成, 神经发生, 血脑屏障, 食欲素A, 食欲素A受体1, MAPK信号通路

Abstract: Low-intensity focused ultrasound is a type of ultrasound that primarily relies on cavitation and mechanical effects. It is non-invasive, transient, and well tolerated. Previous studies have confirmed that low-intensity focused ultrasound can reduce neuroinflammation after traumatic brain injury and exert neuroprotective effects. However, whether it can also induce angiogenesis and neurogenesis in the brain, as well as the underlying mechanisms, remains unclear. In this preclinical study, a rat model of traumatic brain injury was established using a controlled cortical impact device. The rats were then received 14 days of low-intensity focused ultrasound treatment targeting the thalamus. The results showed that low-intensity focused ultrasound effectively reduced cerebral edema and mitigated blood–brain barrier damage in rats with traumatic brain injury, leading to improved neurological function. Further investigation showed that low-intensity focused ultrasound significantly un-regulated Orexin-A/Orexin-A receptor 1 expression, and intraperitoneal administration of the Orexin-A receptor 1 inhibitor SB334867 prevented the neuroprotective effects of low-intensity focused ultrasound. Subsequent transcriptome sequencing revealed that low-intensity focused ultrasound activated the MAPK signaling pathway. Finally, in an in vitro cell injury model created using tumor necrosis factor-alpha, low-intensity focused ultrasound enhanced endothelial cell migration, stimulated angiogenesis, and supported hippocampal neuron migration and growth. Moreover, the MAPK signaling pathway inhibitor LY3214996 suppressed these effects. Taken together, our findings suggest that low-intensity focused ultrasound enhances angiogenesis and neurogenesis and improves neurological function following traumatic brain injury by regulating the expression of Orexin-A/Orexin-A receptor 1, which activates the MAPK signaling pathway. 

Key words: angiogenesis, blood–brain barrier, low-intensity focused ultrasound, MAPK signaling pathway, nerve repair, neurogenesis, neurological function, orexin-A, OX1R, traumatic brain injury