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Impaired Antioxidant Activity of High-Density Lipoprotein in Chronic Kidney Disease Contributes to Atherosclerosis

Strategic Insights

— 1 min read

Chronic kidney disease (CKD) significantly increases the risk of cardiovascular disease and mortality, which is partly attributed to the accelerated atherosclerosis and inflammation that occur concurrently with CKD. CKD is characterized by oxidative stress, inflammation, and high-density lipoprotein (HDL) deficiency, which are key factors that promote atherosclerosis. The protective mechanisms of HDL against atherosclerosis are compromised in patients with CKD, including the impaired maturation of HDL and reduced levels of HDL-cholesterol.

Key Takeaways:

  • Chronic kidney disease (CKD) leads to accelerated atherosclerosis and increased mortality from cardiovascular disease.
  • Normal high-density lipoprotein (HDL) confers protection against atherosclerosis by inhibiting lipid oxidation and retrieving surplus cholesterol and phospholipids.
  • CKD is associated with reduced levels of HDL-cholesterol, apolipoprotein A-I (ApoA-I), glutathione peroxidase (GPX), lecithin cholesterol acyltransferase (LCAT), and paraoxonase (PON) activities.
  • The antioxidant activity of HDL is significantly impaired in patients with CKD, contributing to a heightened risk of atherosclerosis.
  • The study involved 32 stable hemodialysis-dependent patients and 13 age-matched controls.
  • HDL isolation and determination of in vitro antioxidant activity were performed to assess the antioxidant properties of HDL in patients with CKD.
  • Marked reductions in HDL-cholesterol, ApoA-I, GPX, and LCAT concentrations were observed in CKD patients, accompanied by decreased PON and GPX activities.
  • The antioxidant activity of HDL was reduced by 127% in patients with CKD, unaffected by the hemodialysis procedure.

Statistics:

  • CKD patients exhibited 41% reduction in ApoA-I concentrations.
  • GPX concentrations were reduced by 50% in CKD patients.
  • LCAT concentrations were decreased by 60% in patients with CKD.
  • The antioxidant activity of HDL was impaired by 127% in patients with CKD.
  • HDL-cholesterol, ApoA-I, GPX, and LCAT concentrations were significantly reduced in CKD patients.

Sources:

  • Moradi, H. et al. (2009). Impaired antioxidant activity of high-density lipoprotein in chronic kidney disease. Translational Research, 153(2), 77-85.

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