The present work investigated the mechanism for down-regulation of thrombomodulin (TM), an anticoagulant glycoprotein, on cultured umbilical vein endothelial cells (HUVECs) exposed to lipid extracts from oxidized low-density lipoprotein (ox-LDL). HUVECs exposed to phospholipid extracts, but not to free cholesterol, triglyceride, or cholesterol ester, isolated from ox-LDL reduced TM mRNA levels to nearly the same extent as native ox-LDL.
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