中国神经再生研究(英文版) ›› 2022, Vol. 17 ›› Issue (9): 2058-2063.doi: 10.4103/1673-5374.335158

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

低强度经颅聚焦超声刺激保护脑缺血后血脑屏障的完整性

  

  • 出版日期:2022-09-15 发布日期:2022-03-08

Transcranial focused ultrasound stimulation reduces vasogenic edema after middle cerebral artery occlusion in mice

Li-Dong Deng1, Lin Qi1, Qian Suo1, Sheng-Ju Wu1, Muyassar Mamtilahun1, Ru-Bing Shi1, Ze Liu1, Jun-Feng Sun1, Yao-Hui Tang1, Zhi-Jun Zhang1, Guo-Yuan Yang1, 2, *, Ji-Xian Wang1, *   

  1. 1Department of Rehabilitation Medicine, Ruijin Hospital, School of Medicine, and Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; 2Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
  • Online:2022-09-15 Published:2022-03-08
  • Contact: Guo-Yuan Yang, MD, PhD, gyyang0626@163.com; Ji-Xian Wang, MD, PhD, wangjixian6@163.com.
  • Supported by:
    1Department of Rehabilitation Medicine, Ruijin Hospital, School of Medicine, and Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; 2Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China

摘要:

血脑屏障的破坏是诱发急性缺血性脑卒中血管性水肿和神经细胞死亡的关键。经颅聚焦超声刺激对缺血性脑卒中显示出神经调节和神经保护作用;然而,在缺血性脑卒中急性期,经颅聚焦超声刺激是否能减轻血脑屏障的破坏仍是未知数。为此,实验应用低强度和低频率(0.5 MHz)的经颅聚焦超声刺激干预大脑中动脉闭塞模型小鼠。结果发现,闭塞后2,4或8h,经颅聚焦超声刺激减小了水肿体积,改善了小鼠的神经行为表现,增强紧密连接蛋白1的表达,减少IgG的渗漏,并减少了缺血大脑中炎症因子肿瘤坏死因子α和基质金属蛋白酶9(减少紧密连接的降解)的分泌。这些结果表明,经颅聚焦超声刺激为保护缺血性脑卒中后血脑屏障的完整性提供了一个新的治疗策略。

https://orcid.org/0000-0003-4194-8175 (Guo-Yuan Yang); https://orcid.org/0000-0002-3660-3175 (Ji-Xian Wang)

Abstract: Blood-brain barrier (BBB) disruption underlies the vasogenic edema and neuronal cell death induced by acute ischemic stroke. Reducing this disruption has therapeutic potential. Transcranial focused ultrasound stimulation has shown neuromodulatory and neuroprotective effects in various brain diseases including ischemic stroke. Ultrasound stimulation can reduce inflammation and promote angiogenesis and neural circuit remodeling. However, its effect on the BBB in the acute phase of ischemic stroke is unknown. In this study of mice subjected to middle cerebral artery occlusion for 90 minutes, low-intensity low-frequency (0.5 MHz) transcranial focused ultrasound stimulation was applied 2, 4, and 8 hours after occlusion. Ultrasound stimulation reduced edema volume, improved neurobehavioral outcomes, improved BBB integrity (enhanced tight junction protein ZO-1 expression and reduced IgG leakage), and reduced secretion of the inflammatory factors tumor necrosis factor-α and activation of matrix metalloproteinase-9 in the ischemic brain. Our results show that low-intensity ultrasound stimulation attenuated BBB disruption and edema formation, which suggests it may have therapeutic use in ischemic brain disease as a protector of BBB integrity. 

Key words: blood-brain barrier, brain edema, cerebral blood flow, ischemia, matrix metalloproteinase-9, neurobehavioral outcomes, tight junction, transcranial ultrasound