ABSTRACT
The anti-inflammatory and antinociceptive effects of the crude hydroalcoholic extract (PE) of Pfaffia glomerata roots was assessed in the carrageenan-induced rat paw edema at the doses of 100, 200 and 300 mg/kg, using different animal models. An anti-inflammatory dose effect response correlation of r=0.997 and Y=11.67x+0.02 was found. At the same doses, the extract-inhibited acetic acid-induced writhing in mice, but no dose response correlation was found. Oral administration of 100 mg/kg of PE and 0.5 mg/kg of dexamethazone inhibited by 29 and 61%, the granulomatous tissue formation (p>0.05), respectively. These results indicate the potential of this plant extract to treat chronic inflammation. At the assayed doses no significant activity was found in the hot plate test, as well as in the cell migration-induced by carrageenan.
Subject(s)
Amaranthaceae , Analgesics/therapeutic use , Anti-Inflammatory Agents/therapeutic use , Plant Roots/chemistry , Analgesics/chemistry , Animals , Anti-Inflammatory Agents/chemistry , Carrageenan , Dose-Response Relationship, Drug , Edema/chemically induced , Edema/drug therapy , Male , Mice , Pain Measurement , Phytotherapy , Plant Extracts/administration & dosage , Plant Extracts/chemistry , Plant Extracts/therapeutic use , Rats , Rats, WistarABSTRACT
Three different concentrations (1, 10 and 50 microg/ml) of lyophilized hydroalcoholic crude extract of Pfaffia glomerata roots were assayed in vitro against strains of Trypanosoma cruzi (Y) and Leishmania braziliensis. It was observed that P. glomerata hydroalcoholic extract was relatively active within the tested concentrations for L. (V) braziliensis, but inactive against T. cruzi. Despite the fact that both protozoans belong to the Trypanosomatidae family, we suggest that the difference observed for activity should be related to the biological differences between the two parasite species.
