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A unifying theory of atherogenesis
1Department of Pathology, Louisiana State University School of Medicine at New Orleans, LA 70112, USA.
Insights
Elevated low-density lipoprotein (LDL) increases blood viscosity, promoting atherosclerosis. High-density lipoprotein (HDL) reduces viscosity, offering protection against this cardiovascular disease.
Area of Science:
- Cardiovascular Science
- Biomedical Engineering
- Rheology
Background:
- Atherosclerosis is a complex cardiovascular disease.
- Major risk factors include elevated serum low-density lipoprotein (LDL).
- The precise mechanisms linking LDL to atherosclerosis require further elucidation.
Purpose of the Study:
- To propose a novel theory on the pathogenesis of atherosclerosis.
- To elucidate the role of blood viscosity and erythrocyte aggregation in atherosclerosis.
- To explore the contrasting roles of LDL and HDL in disease development.
Main Methods:
- Theoretical review and synthesis of existing data.
- Analysis of the biophysical effects of lipoproteins on blood rheology.
- Conceptual modeling of atherogenesis based on viscosity changes.
Main Results:
- Elevated LDL increases blood viscosity by promoting erythrocyte aggregation.
- Increased viscosity leads to decreased blood flow, enhancing atherogenic element interaction with the endothelium.
- High-density lipoprotein (HDL) antagonizes erythrocyte aggregation, reducing viscosity and protecting against atherosclerosis.
Conclusions:
- Blood viscosity, modulated by LDL and HDL via erythrocyte aggregation, is a central factor in atherosclerosis.
- This theory offers a unified explanation for major atherosclerosis risk factors.
- Further research into rheological interventions for cardiovascular disease is warranted.
Abstract:
The author proposes that all major risk factors, including elevated serum low-density lipoprotein, cause atherosclerosis by increasing viscosity, creating larger areas of decreased blood flow, thereby perpetuating the interaction of atherogenic elements with the endothelium. Low-density lipoprotein causes increased viscosity by fostering erythrocyte aggregation. High-density lipoprotein protects against atherosclerosis by antagonizing erythrocyte aggregation, thereby decreasing viscosity. Implications of this theory are discussed.