Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
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Pharmacological Study on the Novel Antinociceptive Agent, a Novel Monoterpene Alkaloid from Incarvillea sinensis
Yu-Ming ChiMotoyuki NakamuraToyokichi YoshizawaXi-Ying ZhaoWen-Mei YanFumio HashimotoJunei KinjoToshihiro NoharaShinobu Sakurada
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2005 Volume 28 Issue 10 Pages 1989-1991

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Abstract

To determine the antinociceptive mechanism of incarvillateine (INCA), the opiate antagonists nor-binaltorphimine (nor-BNI), β-funaltrexamine (β-FNA) and naltrindole (NTI) were pretreated prior to its injection in a formalin test. The antinociceptive effect of INCA was antagonized by nor-BNI (κ-receptor antagonist) and β-FNA (μ-receptor antagonist), while NTI (δ-receptor antagonist) did not influence its effect. Furthermore, the antinociceptive effect of INCA was blocked by theophylline (THEO), an adenosine-receptor antagonist. These results suggested that the antinociceptive effect arose from the activation of μ-, κ-receptors and adenosine-receptor.

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© 2005 The Pharmaceutical Society of Japan
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