Abstract
Using immunohistochemical technique, we investigated the regionally different roles of muscarinic receptors in the induction of HSP-70 by NMDA receptor antagonists. The administration of memantine and phencyclidine induced HSP-70 in the retrosplenial cortex of rat brain. Pretreatment with the muscarinic receptor antagonist scopolamine (0.1–1 mg/kg) blocked induction of HSP-70 in layer III of the retrosplenial cortex. However, induction of HSP-70 in layer V was augmented by scopolamine. These results suggest a regional difference in the mechanism of neurotoxicity induced by NMDA receptor antagonists.
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