Circulating fatty-acid binding-protein 4 levels predict CV events in patients after coronary interventions

Background: Fatty-acid binding protein-4 (FABP4) has been associated with the metabolic syndrome, diabetes mellitus, atherosclerosis, incident heart failure, and the prognosis of coronary heart disease (CHD). However, recent studies have not reported a significant correlation between FABP4 and cardiovascular (CV) mortality in high-risk patients or those with documented CHD. The present study aimed to evaluate the association between FABP4 and the prognosis in a cohort of patients with CHD who received coronary interventions. Methods: Serum FABP4 levels were measured in 973 patients after a successful intervention for CHD, who were then prospectively followed for 30 months. Result: During this period, 223 patients experienced composite CV outcomes (22.92%), defined as cardiovascular/cerebrovascular death, nonfatal myocardial infarction (MI), nonfatal stroke, hospitalization for refractory or unstable angina, hospitalization for heart failure, and peripheral artery occlusive disease. Kaplan-Meier curves showed a significant association between FABP4 levels at baseline (categorized in tertiles) and composite CV outcomes during followup (log-rank test, p < 0.003). The patients with the highest tertile of baseline FABP4 had an increased risk of composite CV outcomes (hazard ratio (HR) 1.662; 95% confidence interval (CI), 1.2-2.302; p = 0.0022), which remained significant after multivariate adjustments for traditional risk factors and hs-CRP (HR 1.596; 95% CI, 1.088-2.342; p = 0.0168). In contrast, FABP4 failed to show a significant association with cardiovascular/cerebrovascular death, nonfatal MI, or nonfatal stroke after multivariate adjustments (HR, 1.594; 95% CI, 0.651 -3.904, p = 0.3073). Conclusion: In conclusion, circulating FABP4 is an independent prognostic predictor for the composite cardiovascular events in the patients with stable CHD after coronary interventions. Copyright (C) 2020, Formosan Medical Association. Published by Elsevier Taiwan LLC.