冰岛衣（Cetraria islandica (L) Ach.）抗氧化活性的测定

Determination of antioxidant activity of lichen Cetraria islandica (L) Ach.

作者信息

Gülçin Ilhami, Oktay Münir, Küfrevioğlu O Irfan, Aslan Ali

机构信息

Department of Chemistry, Faculty of Science and Arts, Ataturk University, 25240 Erzurum, Turkey.

出版信息

J Ethnopharmacol. 2002 Mar;79(3):325-9. doi: 10.1016/s0378-8741(01)00396-8.

DOI:10.1016/s0378-8741(01)00396-8

PMID:11849836

Abstract

The study was aimed at evaluating the antioxidant activity of aqueous extract of C. islandica. The antioxidant activity, reducing power, superoxide anion radical scavenging and free radical scavenging activities were studied. The antioxidant activity increased with the increasing amount of extracts (from 50 to 500 microg) added to linoleic acid emulsion. About 50, 100, 250, and 500 microg of aqueous extract of C. islandica showed higher antioxidant activity than 500 microg of alpha-tocopherol. The samples showed 96, 99, 100, and 100% inhibition on peroxidation of linoleic acid, respectively. On the other hand, the 500 microg of alpha-tocopherol showed 77% inhibition on peroxidation on linoleic acid emulsion. Like antioxidant activity, the reducing power, superoxide anion radical scavenging and free radical scavenging activities of C. islandica depends on concentration and increasing with increased amount of sample. The results obtained in the present study indicate that C. islandica is a potential source of natural antioxidant.

摘要

本研究旨在评估冰岛衣藻水提取物的抗氧化活性。对其抗氧化活性、还原能力、超氧阴离子自由基清除能力和自由基清除能力进行了研究。随着添加到亚油酸乳液中的提取物量（从50微克增加到500微克）的增加，抗氧化活性增强。约50、100、250和500微克的冰岛衣藻水提取物显示出比500微克α-生育酚更高的抗氧化活性。这些样品对亚油酸过氧化的抑制率分别为96%、99%、100%和100%。另一方面，500微克α-生育酚对亚油酸乳液过氧化的抑制率为77%。与抗氧化活性一样，冰岛衣藻的还原能力、超氧阴离子自由基清除能力和自由基清除能力取决于浓度，并随样品量的增加而增强。本研究获得的结果表明，冰岛衣藻是天然抗氧化剂的潜在来源。