alexa Time dependent changes of striatal interneurons after focal cerebral ischemia in rats.


Neurochemistry & Neuropharmacology

Author(s): Sakuma M, Hyakawa N, Kato H, Araki T

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Abstract The cellular damage over time and the alterations of neuronal subtypes was characterized in the striatum after 90-min middle cerebral artery occlusion and reperfusion in rats. We investigated the immunohistochemical alterations of choline acetyltransferase (ChAT)-positive (cholinergic-positive), gamma-aminobutyric acid (GABA)ergic parvalbumin (PV)-positive, GABAergic nNOS (neuronal nitric oxide synthase)-positive interneurons, neuronal nuclei (NeuN)-positive spiny projection neurons, glial fibrillary acidic protein (GFAP)-positive strocytes and microglial response factor-1 (MRF-1)-positive microglia in the striatum after focal cerebral ischemia in rats. In the present study, transient focal cerebral ischemia in rats caused severe damage against interneurons as well as spiny projection neurons in the striatum. In contrast, a significant increase in the number of GFAP-immunopositive astrocytes was observed in the ipsilateral striatum 15 days after focal cerebral ischemia. Furthermore, a significant increase of MRF-1 immunoreactivity was observed in microglia of the ipsilateral striatum 7 days and 15 days after focal cerebral ischemia. Among three types of cholinergic interneurons, GABAergic PV-positive interneurons and GABAergic nNOS-positive interneurons, the severe damage of cholinergic and GABAergic PV-positive interneurons was more pronounced than that of GABAergic nNOS-positive interneurons after transient focal cerebral ischemia in rats. Furthermore, the present results suggest that GABAergic nNOS-positive interneurons in the striatum after focal cerebral ischemia undergo cellular death in a delayed manner. This article was published in J Neural Transm (Vienna) and referenced in Neurochemistry & Neuropharmacology

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