Lysophosphatidylcholine Enhances Cytokine Production of Endothelial Cells via Induction of L-Type Amino Acid Transporter 1 and Cell Surface Antigen 4F2
- 1 September 2004
- journal article
- research article
- Published by Wolters Kluwer Health in Arteriosclerosis, Thrombosis, and Vascular Biology
- Vol. 24 (9) , 1640-1645
- https://doi.org/10.1161/01.atv.0000134377.17680.26
Abstract
Objective— A diverse range of lipid oxidation products detected in oxidized low-density lipoprotein (oxLDL) and atherosclerotic lesions are capable of eliciting biological responses in vascular cells. We performed DNA microarray experiments to explore novel responses of human umbilical vein endothelial cells (HUVECs) to oxLDL and its components. Methods and Results— cDNA microarray analysis showed that oxLDL, lysophosphatidylcholine (LysoPC), 4-hydroxy-2-nonenal, and oxysterols altered gene expression specifically, but some genes were commonly induced in HUVECs. Solute carrier family 3 member 2 and family 7 member 5, encoding the heavy chain of the cell surface antigen 4F2 (4F2hc) and the L-type amino acid transporter 1 (LAT1), respectively, were induced by oxLDL and many oxidation products. LAT1 requires 4F2hc to form a heterodimeric functional complex to transport neutral amino acids into the cell. LysoPC increased membrane protein levels of LAT1 confirmed by Western blot analysis and also uptake of L-[...Keywords
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