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Updated: Jul 15, 2026
16:01
Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis
Published on: January 26, 2015
Mast cells: multipotent local effector cells in atherothrombosis
1Wihuri Research Institute, Helsinki, Finland. petri.kovanen@wri.fi
Immunological Reviews
|May 15, 2007
Summary
Arterial mast cells (MCs) promote cholesterol buildup and plaque vulnerability in atherosclerosis. These cells also regulate blood clotting, potentially influencing heart attack and stroke risk.
Area of Science:
- Cardiovascular Biology
- Immunology
- Cell Biology
Background:
- Atherosclerosis involves lipid accumulation in artery walls, driven by chronic inflammation.
- Mast cells (MCs) are increasingly recognized for their role in proatherogenic processes.
Purpose of the Study:
- To elucidate the multifaceted roles of mast cells in the development and progression of atherosclerotic lesions.
- To understand how mast cells influence cholesterol metabolism, plaque stability, and thrombus formation.
Main Methods:
- Experimental studies utilizing activated mast cells (MCs) secreting chymase.
- Analysis of mast cell interactions with lipoproteins (LDL, HDL) and arterial wall components (collagen, matrix metalloproteinases).
- Investigation of mast cell-induced endothelial cell (EC) and smooth muscle cell (SMC) apoptosis.
Main Results:
- MCs degrade high-density lipoprotein (HDL), impairing cholesterol efflux.
- MCs induce endothelial cell apoptosis, contributing to plaque erosion.
- MCs disrupt collagen turnover, weakening the plaque cap and increasing rupture vulnerability.
- MCs modulate thrombus formation and participate in plaque wound healing.
Conclusions:
- Mast cells (MCs) actively promote cholesterol accumulation and plaque instability in atherosclerosis.
- MCs influence hemostasis locally, impacting thrombus development.
- MCs contribute to clinical outcomes of atherosclerosis, including myocardial infarction and stroke.
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