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.
Abstract:
Renal transplant recipients often suffer from dyslipidemia which is one of the principal risk factors for cardiovascular disease. This study sought to determine characteristics of high-density lipoprotein (HDL) and low-density lipoprotein (LDL) particles and their associations with carotid intima-media thickness (cIMT) in a group of pediatric renal transplant recipients. We also examined the influence of immunosuppressive therapy on measured LDL and HDL particle characteristics. HDL size and subclass distribution were determined using gradient gel electrophoresis, while concentrations of small, dense LDL (sdLDL)-cholesterol (sdLDL-C) and sdLDL-apolipoprotein B (sdLDL-apoB) using heparin-magnesium precipitation method in 21 renal transplant recipients and 32 controls. Renal transplant recipients had less HDL 2b (P < 0.001), but more HDL 3a (P < 0.01) and 3b (P < 0.001) subclasses. They also had increased sdLDL-C (P < 0.01) and sdLDL-apoB (P < 0.05) levels. The proportion of the HDL 3b subclasses was a significant predictor of increased cIMT (P < 0.05). Patients treated with cyclosporine had significantly higher sdLDL-C and sdLDL-apoB concentrations (P < 0.05) when compared with those on tacrolimus therapy. Pediatric renal transplant recipients have impaired distribution of HDL and LDL particles. Changes in the proportion of small-sized HDL particles are significantly associated with cIMT. Advanced lipid testing might be useful in evaluating the effects of immunosuppressive therapy.
Related Concept Videos
Pharmacokinetics in Pediatric Patients: Drug Distribution
Pharmacokinetics in Pediatric Patients: Drug Excretion
Kidney Transplant I: Introduction
Pharmacokinetics in Pediatric Patients: Drug Metabolism
Kidney Transplant III: Nursing Management
Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption

