Macrophage inflammarafts in atherosclerosis

Area of Science:

• Cell Biology
• Immunology
• Cardiovascular Research

Background:

• Single-cell techniques reveal macrophage heterogeneity in atherosclerosis.
• Macrophage functional diversity at the plasma membrane, particularly lipid rafts, is underexplored.

Approach:

• This review synthesizes recent findings on lipid rafts in macrophages during atherosclerosis.
• Focuses on inflammarafts, enlarged lipid rafts involved in inflammatory receptor assembly.

Key Points:

• Inflammarafts are cholesterol-rich lipid rafts that harbor inflammatory receptor complexes.
• Macrophages with inflammarafts exhibit sustained inflammatory gene expression and heightened responsiveness.
• Inflammarafts are prevalent in nonfoamy macrophages within atherosclerotic lesions, unlike lipid-laden foam cells.

Conclusions:

• Chronic inflammaraft maintenance in nonfoamy macrophages is a key mechanism in inflammatory macrophage reprogramming.
• Understanding inflammaraft formation and persistence is crucial.
• Inflammarafts represent a potential novel therapeutic target for atherosclerosis.