The pattern of neuronal injury following seizures induced by intranigral kainic acid.
The substantia nigra pars reticulosa (SNpr) is involved in the initiation and propagation of seizures within the limbic system (cingulate and parahippocampal gyri and associated connections in the brain stem, e.g. amygdala, hypothalamus, some thalamic nuclei, and parts of basal ganglia). We have investigated the pattern of neuronal injury (using heat shock protein (HSP) expression) and cell death (acid-fuchsin (AF) staining) in SNpr and limbic structures following seizures evoked by bilateral intranigral injection of kainic acid. Affected cells were observed predominantly in piriform cortex, amygdala, hippocampal formation, and thalamic nuclei; massive necrosis or hemorrhage occurred in bilateral piriform cortices following prolonged seizures. The piriform cortex may play an important role in the activation of limbic seizures under the regulation of the SNpr.
University of California, San Francisco.
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K
Tanaka
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RP
Simon
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D016923:Cell Death / Q000187:drug effects; D004569:Electroencephalography / Q000187:drug effects; D018840:HSP70 Heat-Shock Proteins / Q000096:biosynthesis; D006651:Histocytochemistry; D007267:Injections; D007608:Kainic Acid / Q000008:administration & dosage; D008297:Male; D009474:Neurons / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012640:Seizures / Q000139:chemically induced / Q000473:pathology*; D013378:Substantia Nigra
D018840:HSP70 Heat-Shock Proteins; D007608:Kainic Acid