BMC Complementary and Alternative Medicine | |
TRPV1 channel inhibition contributes to the antinociceptive effects of Croton macrostachyus extract in mice | |
João Batista Calixto2  Edinéia Lemos de Andrade3  Ana Flavia Paszcuk3  Rafael Cypriano Dutra1  Télesphore Benoît Nguelefack3  | |
[1] Laboratory of Autoimmunity and Immunopharmacology, Campus Araranguá, Universidade Federal de Santa Catarina, Araranguá, 88900-000, SC, Brazil;Centre of inovation and preclinic studies (CIEnP), Av. Luiz Boiteux Piazza 1302, Cachoeira do Bom Jesus, Florianópolis, SC, Brazil;Department of Pharmacology, Centre of Biological Sciences, Universidade Federal de Santa Catarina UFSC, Campus Universitario, Rua Ferreira Lima 82, Trindade, Florianopolis, 88049-900, SC, Brazil | |
关键词: TRPV1; Antinociceptive; Inflammatory pain; Neuropathic pain; Croton macrostachyus; | |
Others : 1222679 DOI : 10.1186/s12906-015-0816-z |
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received in 2014-12-19, accepted in 2015-08-10, 发布年份 2015 | |
【 摘 要 】
Background
Previous study showed that extracts from Croton macrostachyus (Euphorbiaceae) exhibit analgesic effects in acute pain models. The present study evaluates the antinociceptive properties of the methanol/methylene chloride extract (MECM) of the stem bark of this plant using mice models of persistent inflammatory and neuropathic pain, and assesses its mechanism of action.
Methods
MECM was tested on Complete Freund adjuvant (CFA)-induced persistent thermal and mechanical pain, neuropathic pain induced by partial sciatic nerve ligation (PSNL), prostaglandin E 2(PGE 2 )-induced acute mechanical hyperalgesia, as well as on nociception induced by capsaicin in mice. Mechanical hyperalgesia was assessed using von Frey hair in awake mice. The mechanism of action of MECM was evaluated by using glibenclamide on PGE 2 -induced hyperalgesia or rimonabant on capsaicin-induced pain.
Results
MECM administered orally at the doses of 250 and 500 mg/kg, induced long lasting and significant antihyperalgesic effects on CFA-inflammatory and PSNL-induced neuropathic pain. MECM significantly reduced the mechanical hyperalgesia induced by PGE 2either when administered preventively or therapeutically. MECM also significantly and time dependently inhibited the capsaicin-induced nociception. These effects were not affected by glibenclamide or by rimonabant.
Conclusions
The present results demonstrate that the oral administration of MECM to mice resulted in long lasting antihyperalgesic activity in inflammatory and neuropathic pain as well as in acute and persistent pain. The mechanism underlying the long lasting MECM antihyperalgesic effect is currently unknown, but might be mediated, at least partially, through the modulation of TRPV1 receptors.
【 授权许可】
2015 Nguelefack et al.
【 预 览 】
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