Antinociceptive, Anti-Inflammatory and Acute Toxicity Effects of Juglans Regia L. Leaves in Mice

AUTHORS

H Hosseinzadeh 1 , * , H Zarei 2 , E Taghiabadi 2

1 Pharmaceutical Research Center,Department of Pharmacodynamy and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, [email protected], Razavi Khorasan, Iran

2 Department of Pharmacodynamy and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Razavi Khorasan, Iran

How to Cite: Hosseinzadeh H, Zarei H, Taghiabadi E. Antinociceptive, Anti-Inflammatory and Acute Toxicity Effects of Juglans Regia L. Leaves in Mice, Iran Red Crescent Med J. Online ahead of Print ; 13(1):27-33.

ARTICLE INFORMATION

Iranian Red Crescent Medical Journal: 13 (1); 27-33
Article Type: Research Article
Received: May 20, 2010
Accepted: August 28, 2010

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Abstract

Background: Juglans regia leaves have been used in folk medicine to alleviate inflammatory diseases. This study investigates the antinociceptive, anti-Inflammatory and acute toxicity effects of Juglans regia L. leaves in mice.

 

Methods: 351 Male and female albino mice were divided into negative (saline), positive (morphine or diclofenac) controls as well as test groups (n=6-8). The acute (intraperitoneally) toxicity was evaluated for 2 days. Antinociceptive activities were done using hot-plate and writhing tests. Anti-inflammatory effects were studied using xylene induced ear edema and cotton pellet tests.

 

Results: The LD50 values of J. regia aqueous and ethanolic extrats were 5.5 and 3.3 g/kg, respectively. The aqueous (2.87 and 1.64 g/kg) and ethanolic (2.044 and 1.17 g/kg) extracts showed antinociceptive activity in hot-plate test. The pretreatment of naloxone (2 mg/kg, s.c.) did not inhibit the extracts activities. The extracts exhibited antinociceptive activity in writhing test, which were not blocked by naloxone. In xylene test, both extracts showed anti-inflammatory activity in some doses. The extracts showed anti-inflammatory activity against the chronic inflammation.

 

Conclusion: J. regia leaves demonstrated antinociceptive effect through non-opioid receptors and anti-inflammatory effect against acute and chronic inflammation. The extracts of J. regia could be considered as a promising analgesic and anti-inflammatory agents against diseases such as rheumatoid arthritis.

Keywords

Juglans regia Hot-plate test Writhing test Xylene induced ear edema test Cotton pellet test Mice

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