Abstract:
ETHNOPHARMACOLOGICAL RELEVANCE:Urtica circularis (Hicken) Sorarú is a medicinal plant commonly used in traditional medicine to relieve pain in inflammatory processes. AIM OF THE STUDY:In the present study, the in vivo antinociceptive effect of Urtica circularis ethanolic extract and its isolated compounds has been investigated. MATERIALS AND METHODS:Antinociceptive activity was evaluated through writhing, formalin and hot plate tests in mice. The phytochemical analysis was performed. RESULTS:The extract produced significant inhibition on nociception induced by acetic acid (ED50: 72.2mg/kg, i.p.) and formalin (ED50: 15.8 mg/kg, i.p.) administered intraperitoneally and also orally. Atropine diminished the activity of the extract in the acetic acid test. In this model, at dose of 10mg/kg i.p., vitexin was the most active of the isolated compounds (inhibition of 91%), and chlorogenic acid, caffeic acid and vicenin-2 (6,8-di-C-glucosyl apigenin) produced an inhibition of 72%, 41% and 41%, respectively, whereas apigenin did not show any activity. CONCLUSIONS:These results suggest that Urtica circularis extract produced antinociception possibly related to the presence of vitexin, chlorogenic, caffeic acid and vicenin-2. The activation of cholinergic systems seems to be involved in the mechanism of antinociception of the extract.
journal_name
J Ethnopharmacoljournal_title
Journal of ethnopharmacologyauthors
Gorzalczany S,Marrassini C,Miño J,Acevedo C,Ferraro Gdoi
10.1016/j.jep.2011.01.025subject
Has Abstractpub_date
2011-04-12 00:00:00pages
733-8issue
3eissn
0378-8741issn
1872-7573pii
S0378-8741(11)00039-0journal_volume
134pub_type
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