Effect of serotonin depletion on seizures learning-memory in pilocarpine-induced epileptic rats / 中国应用生理学杂志
Chinese Journal of Applied Physiology
;
(6): 210-213, 2012.
Artigo
em Chinês
| WPRIM
| ID: wpr-329906
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the relationship between serotonin (5-HT) and epilepsy and the mechanism of learning-memory in pilocarpine (PILO)-induced epileptic rats after 5,7-dihydroxytryptamine (5,7-DHT) microinjection in median raphe nucleus.</p><p><b>METHODS</b>Adult S D rats were randomly divided into 3 groups PILO group, PILO+ 5,7-DHT group, vehicle control group; PILO group was divided into two groups by status epilepticus (SE) PILO + SE group and PILO - SE group. The rats' seizures and cortex electroencephalography (EEG) were observed by video EEG. The rats' spatial learning-memory was evaluated by Morris water maze. Finally, serotonergic neuron in raphe nuclei was observed by immunohistochemistry.</p><p><b>RESULTS</b>After treatment of 5,7-DHT (PILO + 5,7-DHT group), the success rate, the mortality and the frequency of chronic spontaneous seizures in pilocarpine-induced epilepsy model were all improved. Compared with the control group, the number of serotonergic neuron in raphe nuclei was decrease in PILO + SE group (P < 0.05). Moreover, it's extremely decrease in PILO + 5,7-DHT group (P < 0.01). Compared with control group, the mean escape latency was prolonged, the times of crossing target was decreased and the retention time in target zone was shortened in PILO + SE group (P < 0.05), but there was no significant difference between PILO + SE group and PILO + 5,7-DHT group.</p><p><b>CONCLUSION</b>Depletion of serotonin may facility the rats' epileptic seizures, but we could not interpret which may cause epileptic rats' cognitive deficit.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Pilocarpina
/
Psicologia
/
Núcleos da Rafe
/
Serotonina
/
Ratos Sprague-Dawley
/
Aprendizagem em Labirinto
/
5,7-Di-Hidroxitriptamina
/
Epilepsia
/
Toxicidade
/
Memória
Tipo de estudo:
Estudo prognóstico
Limite:
Animais
Idioma:
Chinês
Revista:
Chinese Journal of Applied Physiology
Ano de publicação:
2012
Tipo de documento:
Artigo
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