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Thermal hyperalgesic effects induced by intracerebroventricular injection of interleukin-1beta in rats / 生理学报
Acta Physiologica Sinica ; (6): 325-328, 2002.
Artigo em Inglês | WPRIM | ID: wpr-318992
ABSTRACT
The present study was to investigate the effects of intracerebroventricular (i.c.v.) injection of interleukin-1beta (IL-1beta) on thermal nociception in SD rats. The rats were divided into control and drug-administration groups. The animals of control group were given vehicle solution via i.c.v. injection. The animals of drug-administered groups were given IL-1beta at different doses (5, 50 and 500 pg/kg b.w.) via i.c.v. injection. IL-1 receptor antagonist (IL-1ra, 50 ng/kg) was injected 20 min before injection of IL-1beta or vehicle solution. The nociceptive threshold, which was represented as paw withdrawal latency (PWL), to a noxious thermal stimulation was measured using an analgesiameter. I.c.v. injection of IL-1beta dose-dependently shortened the PWL. At the dose of 500 pg/kg, the shortening of the PWL occurred at 20 min, reaching a peak within 40 min, lasted 100 min after injection, then gradually returned to the baseline level. Pretreatment with IL-1ra completely blocked the effects of IL-1beta-induced shortening in PWL. The results obtained suggest that IL-1beta may induce hyperalgesia in rats through binding to IL-1 receptors in the brain.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Farmacologia / Tato / Receptores de Interleucina-1 / Ratos Sprague-Dawley / Tratamento Farmacológico / Proteína Antagonista do Receptor de Interleucina 1 / Interleucina-1beta / Nociceptividade / Temperatura Alta / Hiperalgesia Limite: Animais Idioma: Inglês Revista: Acta Physiologica Sinica Ano de publicação: 2002 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Farmacologia / Tato / Receptores de Interleucina-1 / Ratos Sprague-Dawley / Tratamento Farmacológico / Proteína Antagonista do Receptor de Interleucina 1 / Interleucina-1beta / Nociceptividade / Temperatura Alta / Hiperalgesia Limite: Animais Idioma: Inglês Revista: Acta Physiologica Sinica Ano de publicação: 2002 Tipo de documento: Artigo