Summary
A topographical and cellular immunohistochemical analysis was performed on the striatonigral system of rats with unilateral, reversible middle cerebral artery (MCA) occlusion. Antibodies to calcineurin (CaN), parvalbumin (PV), choline acetyltransferase (ChAT) and glial fibrillary acidic protein (GFAP) were used in this study. Sixty days after the operation, the ipsilateral striatum showed a characteristic cell type-specific injury in the dorsolateral part of the nucleus (i.e., non-limbic striatum): a marked reduction in the number of medium-sized spinous neurons expressing CaN immunoreactivity and a selective sparing of PV-and ChAT-positive interneurons. There was also a marked depletion of striatonigral afferents visualized by CaN immunostaining in the lateral portion of the substantia nigra pars reticulata, which is considered to be implicated with motor function. In addition, it was noted that such striatonigral involvement was accompanied by marked gliosis showing strong GFAP immunolabeling. The present data suggest that rats with reversible MCA occlusion can be a useful animal model for studying cell type-specific ischemic injury and subdivisional involvement of the striatonigral pathway as a part of the cortico-subcortical loop subserving motor function.
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Supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education and Culture of Japan
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Goto, S., Nagahiro, S., Korematsu, K. et al. Striatonigral involvement following transient focal cerebral ischemia in the rats: an immunohistochemical study on a reversible ischemia model. Acta Neuropathol 85, 515–520 (1993). https://doi.org/10.1007/BF00230491
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DOI: https://doi.org/10.1007/BF00230491