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We examined the antiepileptic properties of topiramate (TPM) in amygdaloid (AM) kindling in rats. Electrodes were implanted into the left AM of adult male Wistar rats. The animals were kindled at the after-discharge (AD) threshold. After the completion of kindling, the generalized seizure triggering threshold was determined. The drugs were administered intraperitoneally in animals which showed stable generalized convulsions at near-threshold stimulation. Intraperitoneal administration of TPM at doses of 25 mg/kg or more produced an anticonvulsive effect, but did not readily suppress limbic seizures. Complete suppression of AD was observed in only 3/8 rats at the highest dose of 200 mg/kg, which was not statistically significant. On the other hand, TPM at 100 and 200 mg/kg significantly delayed AM kindling. Thus, TPM showed modest therapeutic properties of conventional antiepileptic drugs in kindling model, those of TPM more closely resemble those of phenobarbital and the benzodiazepines than those of phenytoin and carbamazepine.
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M Seino
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Epilepsy research,
K Amano, and
K Hamada, and
K Yagi, and
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K Amano, and
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Canadian journal of physiology and pharmacology,
K Amano, and
K Hamada, and
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October 2008,
Epilepsy research,
K Amano, and
K Hamada, and
K Yagi, and
M Seino
February 1978,
Epilepsia,
K Amano, and
K Hamada, and
K Yagi, and
M Seino
December 1988,
Experimental neurology,
K Amano, and
K Hamada, and
K Yagi, and
M Seino
June 1988,
No to shinkei = Brain and nerve,
K Amano, and
K Hamada, and
K Yagi, and
M Seino
January 2017,
Biomedical research (Tokyo, Japan),
K Amano, and
K Hamada, and
K Yagi, and
M Seino
August 1998,
Brain research,
