Prooxidative effects of ambient pollutant chemicals are inhibited by HDL.
Prooxidative effects of ambient pollutant chemicals are inhibited by HDL.
复制标题
HDL 可抑制环境污染物化学物质的促氧化作用。
DOI：
10.1002/jbt.21475
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发表时间：
2013
影响因子：
3.6
通讯作者：
Araujo,JesusA
中科院分区：
文献类型：
--
作者：
Yin,Fen;Ramanathan,Gajalakshmi;Zhang,Min;Araujo,JesusA
Exposure to air pollution leads to adverse pulmonary and systemic vascular effects. High levels of plasma high‐density lipoproteins (HDL) cholesterol reduce cardiovascular risk. We explored whether HDL could protect against the prooxidative effects of an organic extract of diesel exhaust particles (DEP) in vascular cells. We used a cell‐free fluorescent assay to evaluate DEP oxidation by air, estimated by the degree of dichlorofluorescein (DCF) fluorescence and tested the ability of HDL to inhibit it. We also evaluated DEP prooxidative effects in bovine aortic endothelial cells and RAW264.7 macrophages by DCF fluorescence. DEP oxidation and prooxidative cellular effects occurred in concentration‐ and time‐dependent manners. Normal HDL inhibited DEP oxidation and prooxidative cellular effects, whereas dysfunctional HDL failed to inhibit DEP oxidation and instead, it promoted further oxidation. In conclusion, DEP prooxidative effects in endothelial cells and macrophages are inhibited by normal HDL. Therefore, HDL may protect against air pollution mediated adverse vascular effects. © 2013 Wiley Periodicals, Inc. J BiochemMol Toxicol 27:172‐183, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/jbt.21475
