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Analgesic effects of methanolic extracts of the leaf or root of Moringa oleifera on complete Freund’s adjuvant-induced arthritis in rats

Author(s): Homa Manaheji

Journal: Zhong Xi Yi Jie He Xue Bao
ISSN 1672-1977

Volume: 9;
Issue: 2;
Start page: 216;
Date: 2011;
Original page

Keywords: Moringa oleifera | plant extracts | analgesics | arthritis | experimental | hyperalgesia | Freund’s adjuvant | rats

Objective: Moringa oleifera (family Moringaceae) has been widely used in African folk medicine, and researchers have recently revealed its anti-inflammatory effects in human. This study aimed to evaluate the analgesic properties of methanolic extracts of M. oleifera in complete Freund’s adjuvant (CFA)-induced arthritis in rats. Methods: Adult male Wistar rats, weighing 200 to 220 g, were used in this study. Adjuvant arthritis was induced on day 0 by a single subcutaneous injection of CFA. The prepared extracts from both the root and leaf (200, 300 and 400 mg/kg) of M. oleifera were administered intraperitonealy to rats in the treatment groups 0, 3 and 6 d after CFA injection and indomethacin (5 mg/kg) was used as a positive control drug. Thermal hyperalgesia and mechanical allodynia were evaluated for the analgesic effect 0, 3 and 6 d after CFA injection. Combined methanolic root and leaf extracts of M. oleifera (200 mg/kg) were also tested for the analgesic effect.Results: The potency of the root or leaf extracts of M. oleifera (300 and 400 mg/kg) was similar to that of indomethacin, resulted in significant reductions in both thermal hyperalgesia and mechanical allodynia in rats with CFA-induced arthritis compared with the control group after 3 and 6 d, respectively (P
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