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Melittin-induced Nociceptive Responses are Alleviated by Cyclooxygenase-1 Inhibitor
The Korean Journal of Physiology and Pharmacology ; : 45-50, 2006.
Artículo en Inglés | WPRIM | ID: wpr-728401
ABSTRACT
Melittin-induced pain model has been known to be very useful for the study of pain mechanism. Melittin-induced nociceptive responses are reported to be modulated by the changes in the activity of excitatory amino acid receptor, calcium channel, spinal serotonin receptor and extracellular signaling-regulated kinase. The present study was undertaken to investigate the role of cyclooxygenase (COX) in the melittin-induced nociception. Changes in mechanical threshold, flinchings and paw thickness were measured before and after intraplantar injection of melittin in the rat hind paw. Also studied were the effects of intraperitonealy administered diclofenac (25 mg & 50 mg/kg), piroxicam (10 mg & 20 mg/kg) and meloxicam (10 mg & 20 mg/kg) on the melittin-induced nociceptions. Intraplantar injection of melittin caused marked reduction of mechanical threshold that was dose-dependently attenuated by non-selective COX inhibitor (diclofenac) and selective COX-1 inhibitor (piroxicam), but not by COX-2 inhibitor (meloxicam). Melittin-induced flinchings were strongly suppressed by non-selective COX and COX-1 inhibitor, but not by COX-2 inhibitor. None of the COX inhibitors had inhibitory effects on melittin-induced increase of paw thickness (edema). These experimental findings suggest that COX-1 plays an important role in the melittin-induced nociceptive responses.
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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fosfotransferasas / Canales de Calcio / Serotonina / Piroxicam / Diclofenaco / Inhibidores de la Ciclooxigenasa / Prostaglandina-Endoperóxido Sintasas / Receptores de Glutamato / Ciclooxigenasa 1 / Nocicepción Tipo de estudio: Estudio pronóstico Límite: Animales Idioma: Inglés Revista: The Korean Journal of Physiology and Pharmacology Año: 2006 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fosfotransferasas / Canales de Calcio / Serotonina / Piroxicam / Diclofenaco / Inhibidores de la Ciclooxigenasa / Prostaglandina-Endoperóxido Sintasas / Receptores de Glutamato / Ciclooxigenasa 1 / Nocicepción Tipo de estudio: Estudio pronóstico Límite: Animales Idioma: Inglés Revista: The Korean Journal of Physiology and Pharmacology Año: 2006 Tipo del documento: Artículo