Antioxidant activity from the leaf extracts of Jacaranda puberula Cham., Bignoniaceae, a Brazilian medicinal plant used for blood depuration

Revista Brasileira de Farmacognosia

Japp, Alberto Sadda¹  Kuster, Ricardo Machado¹  Menezes, Fábio de Sousa¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Lima, Lívia Gralato¹  Schripsema, Jan¹  Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Brazil¹  University of Dublin, Ireland¹  Santos, Paula Macedo Lessa dos¹ 

关键词: Jacaranda puberula;    Bignoniaceae;    depurative;    antioxidant activity;    verbascoside;    cis-caffeoyl aldehyde.;   

DOI  :  10.1590/S0102-695X2010000200002

来源: Sociedade Brasileira de Farmacognosia

【 摘 要 】

The antioxidant activity of leaf extracts from Jacaranda puberula Cham., Bignoniaceae, was assayed by the DPPH (2,2-diphenyl-1-picryl-hydrazyl) free radical scavenging method. Three phytomedicines (F1, F2, and F3) used as blood depurative, were tested by the same method. The free radical scavenger potential was measured by the discoloration of the solution. The EC50 values from Gingko bilobaEGb 761® extract and rutin, used as antioxidant for medical purposes, were used as reference. The ethanol extract (EE), ethyl acetate (EA), butanol (EB), aqueous (EAq) and the sample A (obtained from extract EB), showed lower EC50 values than other extracts and phytomedicines. The antioxidant activity (AA) of the extracts was related with the presence of the polyphenol compounds such as verbascoside (1) and cis-caffeoyl aldehyde (2). These structures were determined by chemical and spectroscopic methods and comparison with literature data.

【 授权许可】

Unknown