Atividades antiulcerogênica e antimicrobiana da espécie Spiranthera odoratissima A. ST. HIL. (RUTACEAE)

Abstract

Spiranthera odoratissima A. ST. HIL. (RUTACEAE), knowns as manacá, is a medicinal plant present in Brazilian Cerrado region. It is used in traditional medicine as antiinflammatory, anxiolytic and for the treatment of renal diseases, hepatic diseases, rheumatism, headache and stomachache. The Rutaceae presents widely distributed around the world, with about 150 genera and 1700 species, in Brazil there are about 30 native genera and approximately 192 species, is rich in secondary metabolites with diverse pharmacological and biological activities. The objective of this study was to evaluate the gastroprotective potential of ethanolic extract of the leaves of S. odoratissima(SOL) through gastric ulcer models in rats and its antimicrobial activity and acute toxicity. Analysis of the nuclear magnetic resonance showed characteristic signs of hydrogen to terpenes, limonoids, steroids, coumarins and alkaloids. Foram performed experimental models of gastric ulcer, based on their respective specifications, two control groups were included, one positive (carbenoxolone 100 mg.kg-1 or Cimetidine 100 mg.kg-1) and negative (vehicle - Tween 80® 12%, 10 mL.kg-1). After each methodology was performed euthanasia by CO2 overdose, the stomachs removed, opened in the region of greater curvature and photographed for quantification of ulcerative lesion area through AVSoft® program. SOL at a dose of 100 mg.kg-1 (the lower most effective dose) showed antiulcer activity against gastric lesions induced by absolute ethanol (93% inhibition;p<0,05) and the indomethacin, an anti-inflammatory drug nonsteroidal, (73% inhibition;p<0,05). Howerver, the treatment with SOL does not showed antimicrobial activity in the bacterial strains tested. Additionally, no signs of toxicity were observed, considering the parameters analyzed.