High-Density Lipoprotein Subfractions and Their Oxidized Subfraction Particles in Patients with Chronic Kidney

Hirokazu Honda1, Tsutomu Hirano, Masashi Ueda

  • 1Division of Nephrology, Department of Medicine, Showa University Koto Toyosu Hospital.

Insights

In chronic kidney disease (CKD), altered high-density lipoprotein (HDL) subfractions and increased oxidized HDL particles are linked to cardiovascular disease (CVD) events. These changes, particularly oxidized HDL2, are independent risk factors for CVD in CKD patients.

Area of Science:

  • Nephrology
  • Cardiology
  • Biochemistry

Background:

  • Chronic kidney disease (CKD) is associated with dyslipidemia, including altered high-density lipoprotein (HDL) levels.
  • Oxidative stress and inflammation in CKD can damage HDL particles, potentially increasing cardiovascular disease (CVD) risk.

Purpose of the Study:

  • To investigate the relationship between changes in HDL subfractions (HDL2, HDL3) and their oxidized forms with CVD events in CKD patients.
  • To determine if oxidized HDL particles are independent predictors of CVD in individuals with CKD.

Main Methods:

  • Measured total cholesterol, LDL-C, HDL-C, HDL2, HDL3, apolipoproteins, MDA-LDL, and oxidized HDL (oxHDL, oxHDL2, oxHDL3) in CKD patients (stages 2-5, n=86) and hemodialysis patients (stage 5D, n=25).
  • Followed patients for 28±9 months to record CVD events.
  • Utilized Cox proportional hazards models for multivariate analyses.

Main Results:

  • HDL3 and ApoA1 levels in HDL3 decreased with CKD severity; HDL2 and ApoA1 in HDL2 showed no significant difference.
  • Oxidized HDL2 levels increased with CKD severity, while oxHDL3 and MDA-LDL decreased.
  • High levels of oxidized HDL and its subfractions were identified as independent risk factors for CVD events in CKD patients.

Conclusions:

  • HDL subfractions and their oxidized forms exhibit distinct patterns in CKD patients.
  • Increased levels of oxidized HDL subfractions are implicated in the high incidence of CVD events observed in CKD populations.
Abstract

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