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pubmed-article:10646532pubmed:abstractTextWe investigated the role of nitric oxide (NO) and brain-derived neurotrophic factor (BDNF) in the pentylenetetrazole (PTZ)-induced kindling in rats. Seizures were induced by single administration of PTZ, which was associated with an increase in levels of NO metabolites (NOx) in the hippocampus. Pretreatment with a neuronal NO synthase inhibitor, 7-nitroindazole (7-NI), diminished the PTZ-induced increase in NOx levels without affecting the seizure intensity. Repeated administration of PTZ produced a gradual increase in the seizure intensity, leading to the development of kindling. In the kindled rats, PTZ at a dose of 40 mg/kg increased NOx levels in the hippocampus, whereas it had no effect in control animals. Cotreatment of 7-NI with PTZ blocked the development of kindling and attenuated the PTZ-induced increase in NOx levels. A significant increase in BDNF levels was observed in the hippocampus of the kindled rats, which returned to the control levels following seizures induced by PTZ. 7-NI reduced the hippocampal BDNF levels in control rats and suppressed the increase of BDNF levels in the kindled rats. Our findings suggest that NO plays a role in the development of PTZ-induced kindling and that BDNF may contribute to the NO-dependent plastic changes in neuronal excitability.lld:pubmed
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pubmed-article:10646532pubmed:articleTitleInvolvement of nitric oxide in pentylenetetrazole-induced kindling in rats.lld:pubmed
pubmed-article:10646532pubmed:affiliationDepartment of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Japan.lld:pubmed
pubmed-article:10646532pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10646532pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed