K Manimekalai, Kartik J Salwe, Harsha M Shetty

Journal of Natural Pharmaceuticals 2011 2(3):149-153

Background: The ethanolic extract of Delonix elata was studied for its effect on the acute inflammation and comparison of its ulcerogenic potential with ibuprofen. Materials and Methods: The ethanolic extract of the leaves of D. elata was obtained using the Soxhlet apparatus. Swiss albino mice weighing 20-30 g and Wistar albino rats weighing 120-130 g of either sex were used in the study. The antinociceptive property of the plant extract was screened by acetic acid-induced writhing in mice while the anti-inflammatory property was studied using the carrageenan-induced paw edema in rats. The gastric irritant action was tested by administering the drug orally and screening the gastric mucosa macroscopically and microscopically after acute administration of the D. elata extract in rats. The percent inhibition of the writhing response and paw edema was noted. The stomach were excised and opened along the greater curvature. The severity of ulcers was scored from 0 to 5 depending on the size and severity of ulcer. Results: The plant extract at a dose of 100 and 200 mg/kg showed a significant reduction in writhing with 55.56% and 54.76% of inhibition, respectively, and also showed a significant dose-dependent reduction in the volume of paw edema with approximately 55.78% and 66.31% of inhibition, respectively. The histological section after the acute administration of ibuprofen indicated superficial erosion. In contrast, after acute treatment of D. elata, it was found that the surface epithelium was intact. Conclusion: The present results indicate that D. elata may be considered safer than the conventional nonsteroidal anti-inflammatory drugs (NSAIDs) with respect to gastric irritation potential.