LDL apheresis and inflammation--implications for atherosclerosis.

Area of Science:

• Cardiovascular Medicine
• Immunology
• Biochemistry

Background:

• Low-density lipoprotein (LDL) apheresis is crucial for managing hypercholesterolemia in high-risk patients unresponsive to medication.
• Atherosclerosis is closely linked to inflammation, making inflammatory biomarkers critical in managing at-risk individuals.
• Potential effects of LDL apheresis on these inflammatory markers require thorough examination.

Purpose of the Study:

• To review the literature on LDL apheresis's impact on pro- and anti-inflammatory biomarkers.
• To analyze how different LDL apheresis systems influence these biomarkers.
• To assess the clinical implications of these changes in patients with high atherosclerotic risk.

Main Methods:

• Literature review focusing on studies investigating LDL apheresis and inflammatory biomarkers.
• Analysis of effects on the complement system (C3a, C5a), cytokines, C-reactive protein, fibrinogen, adhesion molecules, myeloperoxidase, and HDL cholesterol.
• Comparison of outcomes across different LDL apheresis systems.

Main Results:

• LDL apheresis affects the complement system, with variations between systems; plasma separation columns may increase C3a/C5a, while apheresis columns adsorb them to differing degrees.
• Proinflammatory cytokines are partially adsorbed, and some anti-inflammatory cytokines increase during treatment.
• Effects on other biomarkers like C-reactive protein and myeloperoxidase were also discussed.

Conclusions:

• LDL apheresis influences a range of pro- and anti-inflammatory biomarkers, with system-dependent variations.
• The clinical consequences of these biomarker alterations remain largely unknown.
• Further large-scale studies comparing different LDL apheresis systems and correlating biomarker profiles with clinical endpoints are necessary.