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Published on: June 8, 2014
Osteoprotegerin and osteoprotegerin/TRAIL ratio are associated with cardiovascular dysfunction and mortality among
Marek Kuźniewski1, Danuta Fedak2, Paulina Dumnicka3
1Chair and Department of Nephrology, Jagiellonian University Medical College, Kraków, Poland.
Insights
Osteoprotegerin (OPG) is a biomarker for cardiovascular dysfunction and mortality in chronic kidney disease (CKD) patients. The OPG/TRAIL ratio also predicts cardiovascular issues and mortality in these patients.
Area of Science:
- Cardiovascular Medicine
- Nephrology
- Biomarkers
Background:
- Patients with chronic kidney disease (CKD), especially those on dialysis, face high rates of cardiovascular morbidity and mortality.
- Osteoprotegerin (OPG), receptor activator of nuclear factor kappa-B ligand (RANKL), and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) are implicated in cardiovascular complications.
Purpose of the Study:
- To investigate the role of OPG, RANKL, and TRAIL as cardiovascular risk factors in patients with stage 5 CKD.
- To assess the predictive value of these factors for mortality in CKD patients.
Main Methods:
- Measured OPG, RANKL, and TRAIL concentrations in 69 hemodialyzed CKD patients and 35 healthy controls.
- Assessed cardiovascular dysfunction using aortic pulse wave velocity (AoPWV), carotid artery intima-media thickness (CCA-IMT), coronary artery calcium score (CACS), and NT-proBNP.
- Collected 7-year follow-up data on cardiovascular and overall mortality.
Main Results:
- CKD patients had higher OPG levels, lower total soluble RANKL, and a higher OPG/RANKL ratio compared to controls.
- OPG and the OPG/TRAIL ratio positively predicted long-term all-cause and cardiovascular mortality.
- OPG correlated with AoPWV, CCA-IMT, and NT-proBNP; OPG/TRAIL correlated with AoPWV and NT-proBNP, independent of traditional risk factors (except age).
Conclusions:
- OPG is confirmed as a biomarker for cardiovascular dysfunction and a mortality predictor in stage 5 CKD.
- The OPG/TRAIL ratio shows potential as a predictor of cardiovascular dysfunction and mortality in this patient group.
Purpose:
The high prevalence of cardiovascular morbidity and mortality among patients with chronic kidney disease (CKD) is observed especially in those undergoing dialysis. Osteoprotegerin (OPG) and its ligands, receptor activator of nuclear factor kappa-B ligand (RANKL) and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) have been associated with cardiovascular complications. Our aim was to study their role as cardiovascular risk factors in stage 5 CKD patients.
Patients And Methods:
OPG, RANKL and TRAIL concentrations were measured in 69 hemodialyzed CKD patients and 35 healthy volunteers. In CKD patients, cardiovascular dysfunction was assessed with aortic pulse wave velocity (AoPWV), carotid artery intima-media thickness (CCA-IMT), coronary artery calcium score (CACS) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) serum concentrations. Cardiovascular and overall mortality data were collected during a 7-years follow-up.
Results:
OPG plasma concentrations were higher in CKD patients comparing to controls. Total soluble RANKL was lower and OPG/RANKL ratio higher in patients. Soluble TRAIL concentrations did not differ between the groups and OPG/TRAIL ratio was higher in CKD patients. OPG and OPG/TRAIL positively predicted long-term mortality (all-cause and cardiovascular) in CKD patients. OPG positively correlated with AoPWV, CCA-IMT and NT-proBNP whereas OPG/TRAIL with AoPWV and NT-proBNP. Described relationships were independent of classical and non-classical cardiovascular risk factors, with exception of age.
Conclusions:
Our study confirmed the role of OPG as a biomarker of cardiovascular dysfunction and a predictor of mortality in stage 5 CKD. OPG/TRAIL ratio can be proposed as a predictor of cardiovascular dysfunction and mortality.
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