Anti-nociceptive and anti-inflammatory activities of Wrightia arborea.
Anti-nociceptive and anti-inflammatory effects of methanolic extract of Wrightia arborea (MEWA) were examined using different models in rats. MEWA was given to rats orally upto 2000 mg kg(-1) b.wt. for acute toxicity study and observed for 14 days. Anti-nociceptive activity was evaluated in rats against Acetic acid induced writhing (chemically induced pain) and Tail immersion method (thermally induced pain). Acute anti-inflammatory activity of MEWA was also evaluated in Formaline-induced rat paw edema model and Carrageenan-induced hind paw edema model in rats. Results demonstrated that no mortality was found upto single dose of 2000 mg kg(-1) b.wt. in rats even after 14 days observation. In comparison to control group MEWA at 100 and 200 mg kg(-1) b.wt. showed highly significant anti-nociceptive activity against chemically (p < 0.001) as well as thermally (p < 0.05 and p < 0.001) induced pain as compared to standard drugs, indomethacin and nalbufin, respectively. In the formalin test, both the doses of 100 and 200 mg kg(-1) of extract significantly prevented increase in volume of paw edema (p < 0.05 and p < 0.01) both in the neurogenic and inflammatory phases. MEWA (200 and 400 mg kg(-1) p.o.) also significantly prevented increase in volume of paw edema in Carrageenan test (p < 0.05 and p < 0.001). The results suggest that MEWA has significant analgesic and anti-inflammatory potential which may be mediated by central and peripheral mechanism.
Department of Pharmacy, University of Rajshahi, Rajshahi-6025, Bangladesh.
Laizuman
L
Nahar
Department of Pharmacy, Southeast University, Dhaka-1213, Bangladesh.
Fatema
F
Nasrin
Department of Pharmacy, University of Rajshahi, Rajshahi-6025, Bangladesh.
Ronok
R
Zahan
Department of Pharmacy, University of Rajshahi, Rajshahi-6025, Bangladesh.
Md Ashik
MA
Mosaddik
D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D029062:Apocynaceae; D004195:Disease Models, Animal; D004487:Edema / Q000139:chemically induced / Q000517:prevention & control*; D005260:Female; D007213:Indomethacin / Q000494:pharmacology; D007249:Inflammation / Q000139:chemically induced / Q000517:prevention & control*; D008297:Male; D000432:Methanol / Q000737:chemistry; D009266:Nalbuphine / Q000494:pharmacology; D010146:Pain / Q000139:chemically induced / Q000517:prevention & control*; D008517:Phytotherapy; D035261:Plant Components, Aerial; D010946:Plants, Medicinal; D051381:Rats; D012997:Solvents / Q000737:chemistry
D000700:Analgesics; D000893:Anti-Inflammatory Agents; D012997:Solvents; D009266:Nalbuphine; D007213:Indomethacin; D000432:Methanol