Erythrocyte membrane, plasma and atherosclerotic plaque lipid pattern in coronary heart disease

Area of Science:

• Cardiovascular Science
• Lipidomics
• Biochemistry

Background:

• Advanced coronary heart disease (CHD) is associated with complex lipid alterations.
• Understanding lipid profiles in atherosclerotic plaque (AP), plasma, and erythrocyte membranes (EM) is crucial for CHD management.

Purpose of the Study:

• To analyze and compare the lipid composition of AP, plasma, and EM in patients with advanced CHD versus healthy controls.
• To investigate potential correlations between lipid alterations and CHD progression.

Main Methods:

• Lipid composition of AP and EM determined by High-Performance Thin-Layer Chromatography (HPTLC).
• Fatty acid profiles of AP, EM, and plasma analyzed using Thin-Layer Chromatography with Flame Ionization Detection (TLC-FID).
• Comparison of lipid profiles between 18 CHD patients and 10 healthy normolipemic subjects.

Main Results:

• CHD patients' plasma and EM showed decreased polyunsaturated fatty acids and increased saturated fatty acids, lowering the unsaturation index.
• Saturated/unsaturated fatty acid ratio was significantly enhanced in CHD patients' plasma and EM.
• Increased total cholesterol and decreased phospholipid percentage in CHD patients' EM indicated altered membrane fluidity, consistent with essential fatty acid deficiency.

Conclusions:

• Lipid composition of erythrocyte membranes (EM) is significantly altered in coronary heart disease (CHD) patients.
• These alterations, including changes in fatty acid saturation and cholesterol content, suggest essential fatty acid deficiency and impaired membrane fluidity.
• EM lipid analysis may serve as a valuable tool for monitoring the evolution of CHD, independent of other risk factors like age or diabetes.