Cheng Fei, Tao Jun, Feng Jian-qiang, Yang Chun-tao, Wang Yan, Zhang Yuan-yuan, Zhang Xiao-lin
Department of Hypertension and Vascular Disease, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
Nan Fang Yi Ke Da Xue Xue Bao. 2010 May;30(5):1103-6.
To explore the correlation between circulating endothelial microparticles (EMPs) and flow-mediated dialation (FMD) in patients with coronary artery disease (CAD), and investigate the role of NADPH oxidase in endothelial cell dysfunction caused by EMPs.
Fifteen patients with CAD and 15 at high risks of CAD were tested for the level of EMPs and FMD and other biochemical indices, and the correlation between the indices were analyzed. EMPs obtained from cultured human umbilical vein endothelial cells (HUVECs) were phenotyped and used to stimulate the HUVECs, whose ROS and NO production was tested.
Endothelial dilation function could be damaged by circulating EMPs in CAD patients. Dysfunction of HUVECs caused by 10(5)/ml EMPs could be reversed by pretreatment with 20 micromol/L apocynin, a NADPH oxidase inhibitor.
Endothelial dialation function of the endothelial cells can be damaged by circulating EMPs in patients with CAD in association with NADPH oxidase activation.
