Immunomodulatory effects of methoxylated flavonoids from two Chromolaena species:: Structure-activity relationships

被引:13
作者
Taleb-Contini, S. H. [1 ]
Kanashiro, A. [1 ]
Kabeya, L. M. [1 ]
Polizello, A. C. M. [1 ]
Lucisano-Valim, Y. M. [1 ]
Oliveira, D. C. R. [1 ]
机构
[1] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Dept Quim & Fis, BR-14040903 Ribeirao Preto, Brazil
关键词
flavonoids; neutrophil; luminol-dependent chemiluminescence; structure-activity relationship;
D O I
10.1002/ptr.1908
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
Excessive generation of reactive oxygen species (ROS) by polymorphonuclear leukocytes (PMNL) is involved in the pathology of many inflammatory diseases. Compounds isolated from natural sources with antioxidant activity can be helpful to inhibit and/or modulate the oxidative damage associated with PMNL-derived ROS. The present study investigated the relationship between the chemical structure of five methoxylated flavonoids, isolated from Chromolaena hirsuta and Chromolaena squalida, and their inhibitory activity on ROS generation by opsonized zymosan-stimulated PMNL. The antioxidant efficacy of the studied flavonoids, assessed by luminol-dependent chemiluminescence, was dependent on the position and number of methoxy and hydroxy groups. Copyright (c) 2006 John Wiley & Sons, Ltd.
引用
收藏
页码:573 / 575
页数:3
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