Estudo do efeito antinociceptivo e/ou anti-inflamatório das folhas de Spiranthera odoratissima A. St.-Hil. (Manacá). -Possível mecanismo envolvido

• Autor(a) principal: BARBOSA, Daniela Borges Marquez
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/2099
• topic: Spiranthera odoratissima St.-Hil.; antinociceptiva; antiinflamatória; fosfolipase A2; planta medicinal; 1. Spiranthera odoratissima A. St.-Hil 2. Antinociceptiva 3. Planta - Anti-inflamatória 4. Planta medicinal; Spiranthera odoratissima A. St.-Hil.; antinociceptive; anti-inflammatory; phospholipase A2; medicinal plant; CNPQ::CIENCIAS DA SAUDE::FARMACIA

Spiranthera odoratissima A. St.-Hil. is popularly known as Manacá and it is a native plant of the Brazilian Savanna Cerrado, and it can be found in the states of Mato Grosso, Goiás, Minas Gerais and Bahia. In the folk medicine this plant is used as an appetite stimulant and to treat rheumatism, abdominal pain, headache, muscle pain, stomach and liver dysfunction, kidney infections and urinary retention. The hydromethanolic fraction was obtained from the ethanolic extract of Spiranthera odoratissima leaves. According to phytochemical screening this fraction contains anthraquinones, tannins, flavonoids and coumarins. This fraction showed antinociceptive activity in the acetic acid-induced writhing method and the involvement of central antinociceptive mechanisms was discarded with the hot plate test, since the reduction in the latency to pain was not observed. The major subfraction isolated from the hydromethanolic fraction (sub-Fr10-28) showed antiinflammatory activity in different methodologies. Both hydromethanolic fraction and sub-Fr10-28 contain tannins able to inhibit the activity of phospholipase A2 enzyme, and subsequently inhibiting the production of arachidonic acid and preventing the production of eicosanoids such as prostaglandins, thromboxanes and leukotrienes by lipoxygenase and cyclooxygenase enzymes participation. These eicosanoids are important mediators for the maintenance of inflammatory process. Concluding, the analgesic effect of this plant may be due to an anti-inflammatory action, and this antiinflammatory action could be the result from the blockage of the phospholipase A2 enzyme.