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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Peroxisome proliferator-activated receptor a ligands increase lectin-like oxidized low density lipoprotein receptor-1 expression in vascular endothelial cells.

Lectin-like oxidized low density lipoprotein receptor-1 (LOX-1) is a receptor for atherogenic oxidized LDL expressed in vascular endothelial cells, smooth muscle cells, and macrophages. Peroxiosme proliferator-activated receptors (PPARs) include subfamilies PPARalpha and PPARgamma, which are expressed in endothelial cells and involved in transcriptional regulation of a large number of genes that affect lipoprotein and fatty acid metabolism as well as inflammation. We therefore explored the effects of PPARalpha and PPARgamma ligands on expression of LOX-1. Treatment of cultured bovine aortic endothelial cells (BAECs) with PPARalpha ligands (fenofibrate and WY14643) remarkably upregulated LOX-1 expression, which was detected by western and northern blot analyses. LOX-1 promoter-reporter gene assay showed that PPARalpha ligands activate transcription of the LOX-1 gene. PPARgamma ligands, in contrast, did not significantly affect LOX-1 expression in BAECs. PPARalpha appears to be a key regulator in promoting LOX-1 expression in BAECs. Upregulated expression of LOX-1 may modulate the catabolism of oxidized LDL and atherosclerotic progression.[1]


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