Abstract
In this study, we compared the mechanisms of brain recovery in intracerebral hemorrhage and ischemia, focusing on synapses, glial cells, and dopamine expression, which are considered fundamental for neural recovery after stroke. Male Wistar rats were divided into intracerebral hemorrhage, ischemia, and sham surgery (SHAM) groups. The intracerebral hemorrhage group was injected with a collagenase solution, the ischemia group was injected with an endothelin-1 solution, and the SHAM group was injected with physiological saline. The motor function of these rats was evaluated using a rotarod test on days 7, 14, 21, and 28 post-surgery. On postoperative day 29, lesion volume was analyzed using Nissl staining. In addition, the protein expression levels of NeuN, GFAP, tyrosine hydroxylase, and PSD95 were analyzed in the striatum and motor cortex. There was no significant difference between the ischemia and intracerebral hemorrhage groups in terms of lesion volume in the striatum; however, the motor recovery of the intracerebral hemorrhage group occurred more rapidly than that of the ischemia group, and the intracerebral hemorrhage group exhibited higher GFAP protein expression in the motor cortex. The rapid motor recovery in intracerebral hemorrhage rats relative to that in ischemia rats may be associated with changes in astrocytes in brain regions remote from the injury site.
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