HPLC-UV and LC-MS Analysis of Quinonemethides Triterpenes in Hydroalcoholic Extracts of “espinheira santa” (Maytenus aquifolium Martius, Celastraceae) Leaves

نویسندگان

  • Ana C. Nossack
  • Renata M. dos S. Celeghini
  • Fernando M. Lanças
  • Janete H. Yariwake
چکیده

Alguns triterpenos quinonametídicos são conhecidos pela sua citotoxicidade, havendo relatos destas substâncias em várias espécies do gênero Maytenus (Celastraceae), inclusive em Maytenus aquifolium Martius, uma das espécies conhecidas no Brasil como “espinheira santa”. Com o objetivo de dispor de um método analítico útil na avaliação da qualidade de medicamentos fitoterápicos de “espinheira santa”, foi desenvolvido um procedimento de análise por cromatografia líquida de alta eficiência com detector ultravioleta (CLAE-UV). Foi realizada a quantificação dos triterpenos quinonametídicos maitenina e pristimerina, nos extratos hidroalcoólico e aquoso (“chá”) das folhas e das cascas das raízes de M. aquifolium. As análises por cromatografia líquida acoplada à espectrometria de massas (LC-MS) usando a interface de ionização química à pressão atmosférica (APCI), confirmaram a presença de maitenina e pristimerina nos extratos hidroalcoólicos de M. aquifolium, enquanto que nos extratos aquosos estes triterpenos estão abaixo do limite de detecção.

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تاریخ انتشار 2004