Leukocyte Dynamics during the Evolution of Human Coronary Atherosclerosis: Conclusions from a Sevenfold,...

Area of Science:

• Cardiovascular Biology
• Immunology
• Pathology

Background:

• Atherosclerosis is a chronic inflammatory disease.
• Understanding leukocyte dynamics is crucial for disease management.
• Current methods for analyzing atherosclerotic lesions are complex.

Purpose of the Study:

• To develop a comprehensive staining protocol for human coronary atherosclerosis.
• To simultaneously assess leukocyte populations, vascularization, and CD36 expression.
• To elucidate the role of different immune cells in plaque progression and destabilization.

Main Methods:

• A novel sevenfold staining protocol was applied to human coronary arteries.
• The method allowed simultaneous evaluation of macrophages, T cells, B cells, neutrophils, mast cells, vascularization, and CD36.
• Lesions were analyzed across the full spectrum of atherosclerotic disease.

Main Results:

• Macrophage and T-cell abundance progressively increased with plaque progression.
• B cells were found exclusively in adventitial follicles during plaque destabilization.
• Neutrophils were associated with hemorrhage in ruptured plaques; CD36 was not identified as a key foam cell factor.

Conclusions:

• The developed protocol effectively characterizes immune cell infiltration in atherosclerosis.
• Macrophage and T-cell accumulation correlates with disease progression and neoatherosclerosis.
• Plaque healing involves reduced inflammation, but atherosclerosis may recur.