Aspirin (5 mmol/L) inhibits leukocyte attack and triggered reactive cell proliferation in a 3D human coronary in...

Area of Science:

• Cardiovascular Research
• Pharmacology
• Cell Biology

Background:

• Leukocyte attack and smooth muscle cell proliferation drive atherosclerosis and restenosis.
• A 3D human coronary in vitro model (3DLA) simulates these processes.
• Investigating high-dose aspirin's effects is crucial for understanding its therapeutic potential.

Purpose of the Study:

• To evaluate high-dose aspirin's impact on leukocyte adhesion and migration.
• To assess aspirin's effect on smooth muscle cell proliferation in response to leukocyte attack.
• To determine optimal aspirin concentrations for in vitro studies.

Main Methods:

• Utilized a 3D human coronary in vitro model (3DLA) with human coronary endothelial cells and smooth muscle cells.
• Assessed leukocyte (monocytes, CD4+ lymphocytes) adhesion and chemotaxis.
• Measured smooth muscle cell proliferation via bromodeoxyuridine uptake.

Main Results:

• Aspirin at 5 mmol/L inhibited monocyte/lymphocyte adherence by 50% and monocyte chemotaxis by 90%.
• High-dose aspirin (5 mmol/L) significantly reduced smooth muscle cell proliferation post-leukocyte attack (83% for monocytes, 42% for CD4+ lymphocytes).
• Aspirin at 10 mmol/L strongly inhibited intercellular adhesion molecule-1 expression.

Conclusions:

• A local concentration of 5 mmol/L aspirin demonstrates significant beneficial effects in vitro.
• This concentration is proposed as a rational starting point for clinical studies.
• High-dose aspirin shows promise in mitigating key cellular events in early atherosclerosis and restenosis.