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Genetic determinants: is there an "atherosclerosis gene"?

Gerald W Prager1, Bernd R Binder

  • 1Department of Vascular Biology and Thrombosis Research, Medical University of Vienna, Vienna, Austria.

Acta Medica Austriaca
|July 21, 2004
PubMed

Insights

Atherosclerotic disease is a chronic inflammatory condition initiated by turbulent blood flow, leading to endothelial dysfunction and lipid accumulation. This process is exacerbated by high LDL-cholesterol and can be worsened by infections, promoting a persistent inflammatory state.

Area of Science:

  • Cardiovascular Science
  • Immunology
  • Pathophysiology

Background:

  • Atherosclerosis is a chronic inflammatory disease.
  • Turbulent blood flow disrupts normal endothelial function and nitric oxide (NO) generation.
  • Endothelial dysfunction promotes lipid deposition and oxidation within vessel walls.

Purpose of the Study:

  • To elucidate the sequence of events triggering atherosclerosis.
  • To understand the role of turbulent flow and lipid metabolism in disease initiation.
  • To explore the contribution of inflammatory responses and infections to atherosclerosis progression.

Main Methods:

  • Observational analysis of atherosclerotic disease initiation.
  • Focus on endothelial cell activation and lipid peroxidation mechanisms.
  • Investigation of inflammatory markers and potential infectious triggers.

Main Results:

  • Turbulent flow cessation of NO generation by endothelial NO synthase (eNOS) activates endothelial cells.
  • Oxidation of deposited lipoproteins by macrophages perpetuates inflammation when LDL-cholesterol is high.
  • Infections like Chlamydia pneumoniae and viral agents may exacerbate the inflammatory response.

Conclusions:

  • Atherosclerosis is initiated by turbulent flow-induced endothelial dysfunction and lipid peroxidation.
  • High LDL-cholesterol levels are critical for generating sufficient lipid peroxidation products to drive disease.
  • Chronic inflammation involving the immune system, potentially triggered or amplified by infections, characterizes advanced atherosclerosis.

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