Antioxidant activity of Spathodea campanulata (Bignoneaceae) extracts

Revista Brasileira de Plantas Medicinais

S.c Heim²  F.a Guarnier²  D.t Ferreira²  R Braz-filho¹  R Cecchini²  A.l. Cecchini² 

[1] ,Universidade Estadual de LondrinaLondrina,Brasil

关键词: Spathodea campanulata;    antioxidant;    lipidperoxidation;    bark extract;    flower extract;    Spathodea campanulata;    antioxidante;    lipoperoxidação;    extrato da casca;    extrato da flor;   

DOI  :  10.1590/S1516-05722012000200006

来源: SciELO

【 摘 要 】

Spathodea campanulata is used in traditional medicine in Africa as diuretic and anti-inflammatory. Although few studies have reported the mechanism of antioxidant action, this study evidenced the antioxidant activity of S. campanulata bark and flower extracts and their possible mechanism of action. Ethanol extracts of S. campanulata bark and flowers showed antioxidant activity on lipid peroxidation of liver microsome induced by Fe3+-ascorbic acid. Bark extract was 5 times more efficient than flower extract. The antioxidant activity of flower extract, previously complexed with increasing concentrations of Fe3+ (20 - 100 μM) which resulted in antioxidant activity loss, was shown to be related to iron complex formation. In contrast, the antioxidant activity of bark extract was not inhibited by the previous incubation with Fe3+, although complexation was demonstrated by spectral analysis of the solution. These results suggest an antioxidant mechanism other than Fe3+ complex formation. Therefore, the antioxidant mechanisms of S. campanulata flower and bark extracts are distinct from each other, reflecting the extract heterogeneous composition and the mechanism of action.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License