Clinical Research Center, Kashan University of Medical Sciences, Kashan, Iran.
Department of Physical Education and Sport Sciences, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran.
Metab Brain Dis. 2022 Aug;37(6):1843-1853. doi: 10.1007/s11011-022-01003-7. Epub 2022 May 21.
Early treatment of ischemic stroke is one of the most effective ways to reduce brains' cell death and promote functional recovery. This study was designed to examine the effect of aerobic exercise on post ischemia/reperfusion injury on concentration and expression of brain-derived neurotrophic factor (BDNF) and vascular endothelial growth factor (VEGF) after inducing a neuronal loss in CA1 region of hippocampus in Male Wistar rats. Three experimental groups including sham(S), ischemia/reperfusion-control (IRC) and ischemia/reperfusion exercise (IRE) were used for this purpose. The rats in the IRE group received a bilateral carotid artery occlusion treatment. They ran for 45 minutes on a treadmill five days per week for eight consecutive weeks. Cresyl violet (Nissl), Hematoxylin (H & E) and Eosin staining procedure were used to determine the extent of damage. A ladder rung walking task was used to assess the functional impairments and recovery after the ischemic lesion. ELISA and immunohistochemistry method were employed to measure BDNF and VEGF protein expressions. The result showed that the brain ischemia/reperfusion condition increased the cell death in hippocampal CA1 neurons and impaired motor performance on the ladder rung task whereas the aerobic exercise program significantly decreased the brain cell's death and improved motor skill performance. It was concluded that ischemic brain lesion decreased the BDNF and VEGF expression. It seems that the aerobic exercise following the ischemia/reperfusion potentially promotes neuroprotective mechanisms and neuronal repair and survival mediated partly by BDNF and other pathways.
早期治疗缺血性中风是减少脑细胞死亡和促进功能恢复的最有效方法之一。本研究旨在探讨有氧运动对缺血再灌注损伤后海马 CA1 区神经元丢失诱导的脑源性神经营养因子 (BDNF) 和血管内皮生长因子 (VEGF) 浓度和表达的影响。为此,使用了三个实验组,包括假手术组(S)、缺血再灌注对照组(IRC)和缺血再灌注运动组(IRE)。IRE 组的大鼠接受双侧颈总动脉闭塞治疗。它们每周五天在跑步机上跑步 45 分钟,连续八周。采用甲苯胺蓝(Nissl)、苏木精(H & E)和伊红染色程序来确定损伤的程度。采用阶梯行走任务来评估缺血性损伤后的功能障碍和恢复情况。ELISA 和免疫组织化学方法用于测量 BDNF 和 VEGF 蛋白的表达。结果表明,脑缺血再灌注条件增加了海马 CA1 神经元的细胞死亡,并损害了阶梯行走任务的运动表现,而有氧运动方案显著减少了脑细胞死亡并改善了运动技能表现。结论是缺血性脑损伤降低了 BDNF 和 VEGF 的表达。似乎缺血/再灌注后进行的有氧运动可以通过 BDNF 和其他途径促进神经保护机制和神经元修复和存活。
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