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[Advanced oxidation protein products induce reactive oxygen species production in endothelial cells]
Fang Yuan1, Shang-xi Liu, Jian-wei Tian
1Department of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Objective:
To investigate the effect of advanced oxidation protein products (AOPP) on production of reactive oxygen species (ROS) in endothelial cells.
Methods:
Human umbilical vein endothelial cell line ECV304 were stimulated with AOPP-modified bovine serum albumin (AOPP-BSA) prepared by oxidation of BSA with HOCl in vitro. ROS production in the cells was evaluated by kinetic measurement of dichlorofluoroscein (DCF) fluorescence produced by oxidation of an oxidant-sensitive dye 2,7-dichlorefluorescin (DCFH) using VICTOR 1420 multilabel counter.
Results:
AOPP-BSA could induce ROS production in ECV304 cells time- and dose-dependently, and the quantity of ROS increased with the oxidation degree of BSA. Pretreatment of cells with a small-molecular-mass glutathione peroxidase mimic ebselen or NADPH oxidase inhibitor apocynin inhibited ROS production by 65% and 29% respectively.
Conclusion:
AOPP-BSA induces ROS production in endothelial cells, partially mediated by NADPH oxidase activation.
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