n/a
Abstract Title:

Central and peripheral antinociceptive effects of ellagic acid in different animal models of pain.

Abstract Source:

Eur J Pharmacol. 2013 May 5 ;707(1-3):46-53. Epub 2013 Mar 23. PMID: 23528359

Abstract Author(s):

Mohammad Taghi Mansouri, Bahareh Naghizadeh, Behnam Ghorbanzadeh, Yaghoub Farbood

Article Affiliation:

Mohammad Taghi Mansouri

Abstract:

The present study was conducted to evaluate the analgesic effects of p.o., i.p., or i.c.v. administration of ellagic acid (EA), and investigate the possible mechanisms underlying the systemic antinociceptive activities in different animal models of pain. Using radiant heat tail-flick test, EA (100-1000μmol/kg, retain-->p.o.) only resulted in antinociception at 1000μmol/kg. Also, EA (10-660 μmol/kg, i.p.) produced the antinociceptive effect in a dose-dependent manner with an ED50 of 122 μmol/kg. In addition, the i.c.v. administration of EA (0.1-2 μmol/rat) resulted in dose-dependent antinociception with an ED50 of 0.33 μmol/rat. EA induced antinociception(330 μmol/kg. i.p.) was reversed by naloxone (1 mg/kg, i.p.). Likewise, EA (1-33 μmol/kg, i.p.) produced significant dose-dependent antinociception when assessed using acetic acid-induced abdominal writhing test with an ED50 of 3.5 μmol/kg. It was also demonstrated that pre-treatment with L-arginine (100mg/kg, i.p.), a nitric oxide (NO) precursor, and methylene blue (20 mg/kg, i.p.), a guanylate cyclase (GC) inhibitor, significantly enhanced antinociception produced by EA suggesting the involvement of L-arginine-NO-cGMP pathway. Additionally, administration of glibenclamide (10mg/kg, i.p.), an ATP-sensitive K(+) channel blocker, significantly reversed antinociceptive activity induced by EA. Moreover, EA treatment had no effect on the motor activity of rats when tested in rota-rod task. The present results indicate that the dose-related antinociceptive action of EA has both peripheraland central components which involve mediation by opioidergic system and L-arginine-NO-cGMP-ATP sensitive K(+) channels pathway.

Study Type : Animal Study

Print Options


Key Research Topics

Sayer Ji
Founder of GreenMedInfo.com

Subscribe to our informative Newsletter & get Nature's Evidence-Based Pharmacy

Our newsletter serves 500,000 with essential news, research & healthy tips, daily.

Download Now

500+ pages of Natural Medicine Alternatives and Information.

This website is for information purposes only. By providing the information contained herein we are not diagnosing, treating, curing, mitigating, or preventing any type of disease or medical condition. Before beginning any type of natural, integrative or conventional treatment regimen, it is advisable to seek the advice of a licensed healthcare professional.

© Copyright 2008-2020 GreenMedInfo.com, Journal Articles copyright of original owners, MeSH copyright NLM.