Background: This study was designed to evaluate the biological significance of simultaneous changes in the circulating levels of osteoprotegerin (OPG) and TNF-related apoptosis inducing ligand (TRAIL) in patients with coronary artery disease (CAD), and, in particular, with acute myocardial infarction (AMI).
Methods: Total levels of OPG and TRAIL were measured by ELISA in patients with AMI (n=113), unstable angina (UA, n=21) and healthy controls (n=120).
Results: Since OPG was elevated during the acute phase (first 12-24-48h) after AMI and in patients with UA with respect to healthy controls, while TRAIL was decreased in acute AMI patients, CAD patients were characterized by an increased OPG/TRAIL ratio. Moreover, the OPG/TRAIL ratio was significantly (p<0.05) higher in the acute AMI patients who developed heart failure (HF) than in those who did not develop HF in the follow-up.
Conclusions: An impaired OPG/TRAIL ratio after AMI is related to a higher risk of HF.
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