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Potamotrygon motoro stingray venom induces both neurogenic and inflammatory pain behavior in rodents.
Kimura, L F; Santos-Neto, M; Barbaro, K C; Picolo, G.
Afiliación
  • Kimura LF; Laboratório Especial de Dor e Sinalização, Instituto Butantan, São Paulo, SP, Brazil; Departamento de Farmacologia, Instituto de Ciências Biomédicas I, Universidade de São Paulo, SP, Brazil.
  • Santos-Neto M; Laboratório de Imunopatologia, Instituto Butantan, São Paulo, SP, Brazil.
  • Barbaro KC; Laboratório de Imunopatologia, Instituto Butantan, São Paulo, SP, Brazil.
  • Picolo G; Laboratório Especial de Dor e Sinalização, Instituto Butantan, São Paulo, SP, Brazil. Electronic address: gisele.picolo@butantan.gov.br.
Toxicon ; 150: 168-174, 2018 Aug.
Article en En | MEDLINE | ID: mdl-29803862
Freshwater stingray accidents cause an immediate, intense, and unrelieved pain which is followed by edema, erythema and necrosis formation. Treatment for stingray envenomation is based on administration of analgesic, antipyretic and anti-inflammatory drugs. Concerning pain control, it is prescribed to immerse punctured limb on hot water to alleviate pain. There are no studies demonstrating specific targets on which stingray venom acts to promote pain. Therefore, the aim of this work was to investigate some mechanisms of Potamotrygon motoro venom (PmV) that contribute to nociception induction. Evaluating spontaneous pain behavior in mice injected i.pl. with PmV, it was seen that PmV induced both neurogenic and inflammatory pain. PmV also induced hyperalgesia in both mice and rats, evaluated through electronic von Frey and rat paw pressure test, respectively. Partial inhibition of hyperalgesia was observed in mice treated with cromolyn or promethazine, which indicated that mast cell and histamine via H1 receptor participate in the inflammatory pain. To search for some targets involved in PmVinduced hyperalgesia, the participation of TRPV1, calcium channels, neurokinins, CGRP, and norepinephrine, was evaluated in rats. It was seen that PmV-induced hyperalgesia occurs with the participation of neurokinins, mainly via NK1 receptor, CGRP, and calcium influx, through both P/Q and L-type voltage-dependent calcium channels, besides TRPV1 activation. The data presented herein indicate that PmV causes hyperalgesia in rodents which is dependent on the participation of several neuroinflammatory mediators.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dolor / Dimensión del Dolor / Venenos de los Peces / Inflamación Límite: Animals Idioma: En Revista: Toxicon Año: 2018 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dolor / Dimensión del Dolor / Venenos de los Peces / Inflamación Límite: Animals Idioma: En Revista: Toxicon Año: 2018 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido