Characteristics of low-density and high-density lipoprotein subclasses in pediatric renal transplant recipients

Aleksandra Zeljkovic1, Jelena Vekic, Vesna Spasojevic-Kalimanovska

  • 1Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia. aleksandra.zeljkovic@pharmacy.bg.ac.rs

Insights

Pediatric renal transplant recipients exhibit altered high-density lipoprotein (HDL) and low-density lipoprotein (LDL) particle profiles, linked to cardiovascular risk. Specific HDL subclasses and small, dense LDL (sdLDL) levels correlate with carotid intima-media thickness (cIMT).

Area of Science:

  • Lipidology
  • Cardiovascular Research
  • Pediatric Nephrology

Background:

  • Dyslipidemia is a major cardiovascular disease risk factor in renal transplant recipients.
  • Understanding lipoprotein particle characteristics is crucial for managing cardiovascular risk in this population.

Purpose of the Study:

  • To characterize high-density lipoprotein (HDL) and low-density lipoprotein (LDL) particles in pediatric renal transplant recipients.
  • To investigate the association between lipoprotein particle characteristics and carotid intima-media thickness (cIMT).
  • To examine the impact of immunosuppressive therapy on lipoprotein profiles.

Main Methods:

  • Gradient gel electrophoresis for HDL size and subclass distribution.
  • Heparin-magnesium precipitation for small, dense LDL (sdLDL)-cholesterol (sdLDL-C) and sdLDL-apolipoprotein B (sdLDL-apoB) quantification.
  • Comparison between 21 pediatric renal transplant recipients and 32 controls.

Main Results:

  • Renal transplant recipients showed reduced HDL 2b but increased HDL 3a and 3b subclasses.
  • Elevated sdLDL-C and sdLDL-apoB levels were observed in recipients.
  • The proportion of HDL 3b subclasses predicted increased cIMT.
  • Cyclosporine treatment was associated with higher sdLDL-C and sdLDL-apoB compared to tacrolimus.

Conclusions:

  • Pediatric renal transplant recipients have abnormal HDL and LDL particle distribution.
  • Altered small HDL particle proportions are linked to increased cIMT.
  • Advanced lipid testing can aid in assessing immunosuppressive therapy effects on lipid profiles.

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