Abstract
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.
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The authors thank all the members of Shahid Mirghani Research Institute for their collaboration.
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This work was supported by the Semnan University of Medical Sciences, Semnan, Iran [grant number A-10-377-2].
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MS has contributed to conceptualization, methodology and writing of original draft, MS, AEM and MHF contributed to investigation and methodology, GM has revised and editing the writing and ZF has contributed to supervision, funding acquisition, project administration. All authors read and approved the final manuscript.
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The research protocol was approved by the Ethics Committee of University of Semnan Medical Sciences coded: IR. Semnan.Rec. 1397. 057.
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Sayyah, M., Seydyousefi, M., Moghanlou, A.E. et al. Activation of BDNF- and VEGF-mediated Neuroprotection by Treadmill Exercise Training in Experimental Stroke. Metab Brain Dis 37, 1843–1853 (2022). https://doi.org/10.1007/s11011-022-01003-7
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DOI: https://doi.org/10.1007/s11011-022-01003-7