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Voluntary running exercise after focal cerebral ischemia modifies astrocytic population and features

ABSTRACT: Voluntary running exercise after focal cerebral ischemia promotes functional recovery and prevents the ischemia-induced dendritic spine loss in the peri-infarct motor cortex layer 5. Neuronal morphology is affected by the perineuronal environmental change. Glia exert crucial roles in the formation of perineuronal environment, and exercise-induced changes of glial phenotype are expected. Here, we demonstrated that voluntary running exercise increased the population of newborn astrocytes in the acute phase after cerebral ischemia at late phase. Transcriptome analysis detected 10 upregulated genes and 70 downregulated genes by exercise in the ipsilateral cortex astrocytes. Gene cluster downregulated by exercise were significantly associated with neuronal morphology. The expression of Lipocalin 2, a factor of decreasing dendritic spines, tended to be decreased in the postischemic astrocytes by exercise. Our results suggest that exercise modifies the phenotype of postischemic astrocytes, which relate to the exercise-induced amelioration of postischemic dendritic spine loss.

ORGANISM(S): Mus musculus

PROVIDER: GSE210674 | GEO | 2022/08/08

REPOSITORIES: GEO

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