Essential phospholipids modify immunological functions and reduce experimental atherosclerosis in rabbits

Area of Science:

• Cardiovascular Research
• Immunology
• Nutritional Science

Background:

• Atherosclerosis is a chronic inflammatory disease characterized by lipid deposition and plaque formation in arteries.
• High-fat diets are a primary risk factor for atherosclerosis, impacting lipid metabolism and immune responses.
• Essential phospholipids (EPL) are implicated in cell membrane structure and function, potentially influencing metabolic and immune processes.

Purpose of the Study:

• To investigate the effects of essential phospholipids (EPL) on atherosclerosis development in a rabbit model.
• To assess the impact of EPL on lipid metabolism and immunological functions during high-fat diet-induced atherosclerosis.
• To explore the relationship between immune system status and atherosclerotic progression.

Main Methods:

• Induction of atherosclerosis in male mongrel rabbits using a high-fat diet.
• Administration of essential phospholipids (EPL) concurrently with the high-fat diet.
• Measurement of aortic plaque area, serum lipid profiles, malonyldialdehyde levels, and immune function parameters.

Main Results:

• EPL supplementation significantly reduced the extent of atherosclerotic lesions in the aorta.
• Serum lipid concentrations decreased, with cholesterol esterified with polyunsaturated fatty acids observed.
• Normalization of plasma malonyldialdehyde and reduced ascorbate free radicals were noted.
• EPL intake improved depressed non-specific and specific immune functions, restoring them to near-normal or normal levels.

Conclusions:

• Essential phospholipids (EPL) demonstrate a protective effect against diet-induced atherosclerosis in rabbits.
• EPL positively modulate lipid metabolism and mitigate oxidative stress markers.
• Maintaining normal immune function is critical for preventing the progression of atherosclerotic changes, with EPL playing a supportive role.