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Prognostic value of C-reactive protein for heart disease in dialysis patients
1Department of Medicine & Therapeutics, Queen Mary Hospital, University of Hong Kong, Hong Kong SAR, China. aw2000.hk@yahoo.com
Insights
C-reactive protein (CRP) is a key inflammation marker. In end-stage renal disease (ESRD) patients, its role as a cardiovascular disease prognostic biomarker requires careful consideration due to non-specific elevation factors.
Area of Science:
- Nephrology
- Cardiology
- Clinical Chemistry
Background:
- C-reactive protein (CRP) is a well-established inflammation marker in the general population, useful for cardiovascular disease prognosis and treatment monitoring.
- Cardiovascular disease is the primary cause of death in end-stage renal disease (ESRD) patients, linked to numerous risk factors including inflammation.
- Elevated CRP is common in ESRD patients, but its specificity as a cardiovascular risk biomarker is questioned due to numerous confounding factors.
Purpose of the Study:
- To review the utility of C-reactive protein (CRP) as a prognostic biomarker for cardiovascular disease in patients undergoing maintenance dialysis.
- To critically evaluate the factors that may influence CRP levels in end-stage renal disease (ESRD) patients.
- To provide an updated perspective on CRP's role in predicting cardiovascular outcomes in the dialysis population.
Main Methods:
- Literature review of clinical and epidemiological data.
- Analysis of studies investigating CRP levels in end-stage renal disease (ESRD) patients on maintenance dialysis.
- Examination of factors influencing CRP elevation in dialysis patients, both related and unrelated to the dialysis procedure.
Main Results:
- CRP is a non-specific inflammatory marker and acute-phase reactant.
- CRP levels can be elevated in ESRD patients due to dialysis-related factors (e.g., infections, membrane bio-incompatibility) and unrelated factors (e.g., malnutrition, chronic infections).
- The prognostic value of CRP for cardiovascular disease in ESRD patients requires careful interpretation due to these confounding factors.
Conclusions:
- The interpretation of elevated CRP levels in end-stage renal disease (ESRD) patients must account for numerous potential confounders.
- Further research is needed to clarify the precise role and reliability of CRP as a prognostic biomarker for cardiovascular disease in the dialysis population.
- Despite limitations, CRP remains a widely used marker, necessitating a nuanced approach to its clinical application in ESRD management.
Abstract:
C-reactive protein (CRP) is considered to be the prototype marker of inflammation. In the general population, there are ample clinical and epidemiological data that indicate its usefulness both in predicting the prognosis for various forms of cardiovascular disease, and in monitoring response to treatment. There is also evolving evidence that CRP may be directly involved in the pathological disease process itself. In end-stage renal disease (ESRD) patients, cardiovascular disease remains the leading cause of morbidity and mortality, and is accounted for by a clustering of both traditional and non-traditional risk factors. Of these, inflammation is considered one of the important risk factors and is usually denoted by the presence of elevated CRP. However, since it is a non-specific inflammatory marker and acute-phase reactant, CRP may become elevated as a result of other dialysis-related (such as graft and fistula infections, bio-incompatible dialysis membrane or dialysate, endotoxin exposure and back filtration) and dialysis-unrelated factors (such as chronic infections and malnutrition). This raises an important question as to whether CRP serves as a useful prognostic biomarker in the dialysis population. This review provides an updated view of the use of CRP as a prognostic marker of cardiovascular disease in ESRD patients on maintenance dialysis.
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