Myeloperoxidase, inflammation, and dysfunctional high-density lipoprotein

Myeloperoxidase-mediated dysfunctional high-density lipoprotein.

T he oxidation of lipoproteins plays an important role in atherogenesis. Most studies have focused on the oxidation of low-density lipoprotein, occurring to a significant extent in the arterial intima leading to the formation of the characteristic foam cell of the atherosclerotic plaque. 1 However, the oxidation of the proteins of high-density lipoprotein (HDL) is thought to substantially atten...

Dysfunctional high-density lipoprotein in patients on chronic hemodialysis.

OBJECTIVES This study examined the functionality of high-density lipoprotein (HDL) in individuals with end-stage renal disease on dialysis (ESRD-HD). BACKGROUND The high rate of cardiovascular disease (CVD) in chronic kidney disease is not explained by standard risk factors, especially in patients with ESRD-HD who appear resistant to benefits of statin therapy. HDL is antiatherogenic because ...

Antioxidant Effects of Vitamins C and E on the Low-Density Lipoprotein Oxidation Mediated by Myeloperoxidase

Background: Oxidative modification of low-density lipoprotein (LDL) appears to be an early step in the pathogenesis of atherosclerosis. Meanwhile, myeloperoxidase (MPO)-catalyzed reaction is one of the potent pathway for LDL oxidation in vivo. The aim of this study was to evaluate in vitro antioxidant effects of vitamins C and E on LDL oxidation mediated by MPO. Methods: MPO was isolated from f...

Humans with atherosclerosis have impaired ABCA1 cholesterol efflux and enhanced high-density lipoprotein oxidation by myeloperoxidase.

RATIONALE The efflux capacity of high-density lipoprotein (HDL) with cultured macrophages associates strongly and negatively with coronary artery disease status, indicating that impaired sterol efflux capacity might be a marker-and perhaps mediator-of atherosclerotic burden. However, the mechanisms that contribute to impaired sterol efflux capacity remain poorly understood. OBJECTIVE Our aim ...

High density Lipoprotein; What to Measure: Quality or Quantity?