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C-reactive protein and coronary heart disease: a critical review
J P Casas1, T Shah, A D Hingorani
1Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, University College London, London, UK.
Insights
C-reactive protein (CRP) elevations link to heart disease risk and complications. This review examines evidence on CRP
Area of Science:
- Cardiovascular Medicine
- Inflammation Biology
- Biomarker Research
Background:
- C-reactive protein (CRP) is an acute phase protein with documented associations to coronary heart disease (CHD) risk.
- High CRP levels post-myocardial infarction correlate with mortality and adverse cardiac events.
- The precise clinical and pathogenic roles of CRP in these contexts remain debated.
Purpose of the Study:
- To critically evaluate the evidence linking C-reactive protein (CRP) to cardiovascular outcomes.
- To differentiate the significance of acute, high-level CRP responses versus modest, persistent elevations.
- To inform the ongoing debate regarding CRP's role in cardiovascular disease pathogenesis and risk.
Main Methods:
- Comprehensive review of large-scale epidemiological studies.
- Analysis of novel experimental research investigating CRP's mechanisms.
- Consideration of potential targeted therapies for modulating CRP.
Main Results:
- Distinguishes between CRP's role in acute injury settings versus chronic low-grade inflammation.
- Highlights the controversial nature of CRP's direct pathogenicity.
- Emphasizes the need for rigorous investigation into distinct CRP concentration patterns.
Conclusions:
- The clinical significance of CRP elevations varies depending on the context (acute vs. baseline).
- Further research is crucial to elucidate the direct pathogenic role of CRP in cardiovascular disease.
- Distinguishing between different CRP elevation patterns is key for accurate risk assessment and therapeutic strategies.
Abstract:
Modestly elevated baseline concentrations of C-reactive protein (CRP), the classical acute phase protein, are associated with the long-term risk of coronary heart disease in general populations, whilst the major acute phase response of CRP following myocardial infarction is associated with death and cardiac complications. The pathogenic and clinical significance of these associations is controversial. Here we critically review the evidence and describe large-scale epidemiological studies, novel experiments and possible specific therapies which will rigorously inform the debate. We distinguish between the potential pathogenicity of high acute phase circulating CRP concentrations in individuals with substantial tissue damage and modest but persistent increases in baseline values in generally healthy subjects.
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