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  • PPARalpha in atherosclerosis and inflammation
  • Zandbergen F; Plutzky J
  • Biochim Biophys Acta 2007[Aug]; 1771 (8): 972-82
  • Peroxisome proliferator-activated receptor (PPAR)alpha is a nuclear receptor activated by natural ligands such as fatty acids as well as by synthetic ligands such as fibrates currently used to treat dyslipidemia. PPARalpha regulates the expression of genes encoding proteins that are involved in lipid metabolism, fatty acid oxidation, and glucose homeostasis, thereby improving markers for atherosclerosis and insulin resistance. In addition, PPARalpha exerts anti-inflammatory effects both in the vascular wall and the liver. Here we provide an overview of the mechanisms through which PPARalpha affects the initiation and progression of atherosclerosis, with emphasis on the modulation of atherosclerosis-associated inflammatory responses. PPARalpha activation interferes with early steps in atherosclerosis by reducing leukocyte adhesion to activated endothelial cells of the arterial vessel wall and inhibiting subsequent transendothelial leukocyte migration. In later stages of atherosclerosis, evidence suggests activation of PPARalpha inhibits the formation of macrophage foam cells by regulating expression of genes involved in reverse cholesterol transport, formation of reactive oxygen species (ROS), and associated lipoprotein oxidative modification among others. Furthermore, PPARalpha may increase the stability of atherosclerotic plaques and limit plaque thrombogenicity. These various effects may be linked to the generation of PPARalpha ligands by endogenous mechanisms of lipoprotein metabolism. In spite of this dataset, other reports implicate PPARalpha in responses such as hypertension and diabetic cardiomyopathy. Although some clinical trials data with fibrates suggest that fibrates may decrease cardiovascular events, other studies have been less clear, in terms of benefit. Independent of the clinical effects of currently used drugs purported to achieve PPARalpha, extensive data establish the importance of PPARalpha in the transcriptional regulation of lipid metabolism, atherosclerosis, and inflammation.
  • |Atherosclerosis/immunology/*physiopathology[MESH]
  • |Cell Adhesion[MESH]
  • |Cytokines/physiology[MESH]
  • |Endothelium, Vascular/physiopathology[MESH]
  • |Humans[MESH]
  • |Inflammation/immunology/*physiopathology[MESH]
  • |Leukocytes/physiology[MESH]
  • |Liver/*physiopathology[MESH]
  • |PPAR alpha/immunology/*physiology[MESH]

  • *{{pmid17631413}}
    *<b>[ PPARalpha in atherosclerosis and inflammation ]</b> Biochim Biophys Acta 2007; 1771(8) ; 972-82 Zandbergen F; Plutzky J


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    Biochim Biophys Acta

    972 8.1771 2007