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Comparative analysis of seizures induced by intracerebroventricular administration of NMDA, kainate and quisqualate in mice

Comparative analysis of seizures induced by intracerebroventricular administration of NMDA, kainate and quisqualate in mice

Experimental Brain Research 88(2): 277-282

The dose-related time course and occurrence of different seizure subtypes was examined in mice after i.c.v. administration of N-methyl-D-aspartate (NMDA), kainate (KA) or quisqualate (QA). At doses of 0.2 to 1 nmol, NMDA dose-dependently induced a single clonic-tonic seizure. Low doses (0.1 to 0.3 nmol) of KA induced only mild myoclonus and whole body clonus, which were dose-dependently replaced by short-delay clonic-tonic seizures at higher doses (0.4 to 1.2 nmol). In contrast, mice treated with 13 to 32 nmol of QA exhibited either mild myoclonus or whole body clonus as well as clonic-tonic seizures. Clonic-tonic seizures induced by NMDA or KA appeared at shorter latencies than those induced by QA, whereas whole body clonus induced by KA or QA appeared with long onset latencies. These results clearly show that i.c.v. administration of NMDA, KA and QA produces different patterns of seizures in mice. This study confirms that NMDA, KA and QA induce convulsions through different underlying mechanisms and suggests that different anatomical pathways are involved in these models.

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Accession: 039614796

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PMID: 1577101

DOI: 10.1007/bf02259102

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