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Ischemic Heart Disease: Overview01:17

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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Genetically elevated C-reactive protein and ischemic vascular disease.

Jeppe Zacho1, Anne Tybjaerg-Hansen, Jan Skov Jensen

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High C-reactive protein (CRP) levels increase ischemic heart and cerebrovascular disease risk. However, CRP gene polymorphisms, despite raising CRP levels, do not directly increase ischemic vascular disease risk.

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Area of Science:

  • Cardiovascular Medicine
  • Genetics
  • Biomarkers

Background:

  • Elevated C-reactive protein (CRP) is linked to increased risks of ischemic heart disease (IHD) and ischemic cerebrovascular disease (ICVD).
  • The causal relationship between CRP levels and these vascular diseases requires further investigation.

Purpose of the Study:

  • To determine if elevated C-reactive protein (CRP) levels causally increase the risk of ischemic heart disease (IHD) and ischemic cerebrovascular disease (ICVD).
  • To investigate the association between CRP gene polymorphisms and the risk of ischemic vascular diseases.

Main Methods:

  • Studied 10,276 individuals in a general population cohort and 31,992 in a cross-sectional study.
  • Compared 2238 IHD patients and 612 ICVD patients with respective controls.
  • Measured high-sensitivity CRP levels and genotyped CRP and apolipoprotein E polymorphisms.

Main Results:

  • Individuals with CRP levels >3 mg/L had 1.6x IHD risk and 1.3x ICVD risk compared to those with CRP <1 mg/L.
  • CRP polymorphisms increased CRP levels by up to 64%, theoretically predicting up to 32% increased IHD risk.
  • However, CRP polymorphisms were not directly associated with increased ischemic vascular disease risk, unlike apolipoprotein E genotypes.

Conclusions:

  • CRP gene polymorphisms are associated with significant increases in CRP levels.
  • Despite elevated CRP levels, CRP gene polymorphisms are not independently associated with an increased risk of ischemic vascular disease.
  • Apolipoprotein E genotypes, however, are linked to both cholesterol levels and IHD risk.