Interleukin-1β blockade in mice with severe LV dysfunction after AMI significantly prevented LVEF reduction (+7% vs -18% in control; P=0.031) and restored contractile reserve.
RCT
randomly assigned
Does IL-1β blockade prevent left ventricular adverse remodeling and restore contractility reserve in a mouse model of severe ischemic cardiomyopathy?
In a mouse model of severe ischemic cardiomyopathy, IL-1β blockade prevented further deterioration in LV systolic and diastolic function and restored contractile reserve.
Absolute Event Rate: 7% vs -18%
p-value: p=0.031
BACKGROUND: Interleukin-1β (IL-1β) modulates the inflammatory response during acute myocardial infarction (AMI) and progression to ischemic cardiomyopathy. We investigated whether blockade of IL-1β after the onset of the cardiac dysfunction prevented left ventricular (LV) adverse remodeling in a mouse model of anterior nonreperfused AMI. METHODS: Infarct size and LV systolic function were assessed by echocardiography 7 days after coronary artery ligation. Mice with large infarct size and LV ejection fraction (LVEF) <40% were randomly assigned to treatment with a monoclonal antibody directed toward IL-1β antibody (10 mg/kg IL-1β-AB) or with a cyclosporine directed antibody (10 mg/kg control-AB). Echocardiogram was repeated after 10 weeks, followed by assessment of contractile reserve using isoproterenol challenge and LV catheterization. RESULTS: After 10 weeks, control-AB-treated mice showed significantly increased LV end-diastolic diameter (+15%, P < 0.001) and decreased LVEF (-18%, P = 0.050). IL-1β-AB had no significant effect on LV end-diastolic diameter (+10%, P = 0.25 vs. control-AB) but significantly prevented LVEF reduction (+7%, P = 0.031 vs. control-AB), enlargement of the right ventricle (P = 0.024), impairment in myocardial performance index (P = 0.028) and contractile reserve (P = 0.008), and increased LV end-diastolic pressure (P = 0.030). CONCLUSIONS: IL-1β blockade using a monoclonal antibody in mice with severe LV dysfunction after AMI prevents further deterioration in LV systolic and diastolic function and restores contractile reserve.
Toldo et al. (Tue,) conducted a rct in Severe ischemic cardiomyopathy after acute myocardial infarction. Monoclonal antibody directed toward IL-1β (IL-1β-AB) vs. Cyclosporine directed antibody (control-AB) was evaluated on Change in left ventricular ejection fraction (LVEF) (p=0.031). Interleukin-1β blockade in mice with severe LV dysfunction after AMI significantly prevented LVEF reduction (+7% vs -18% in control; P=0.031) and restored contractile reserve.