Urolithin B improves cardiac function and reduces susceptibility to ventricular arrhythmias in rats after myocardial infarction.

Urolithin B improves cardiac function and reduces susceptibility to ventricular arrhythmias in rats after myocardial infarction. Eur J Pharmacol. 2020 Jan 17;:172936 Authors: Gao H, Huang X, Tong Y, Jiang X Abstract Cardiac fibrosis and inflammation play critical roles in ventricular remodelling after myocardial infarction (MI). Urolithin B (UB), a metabolite of ellagitannin-rich foods, has various biological activities, but its effect on ventricular remodelling after MI has not been determined. The present study evaluated whether UB inhibited ventricular structural remodelling and decreased the occurrence of ventricular arrhythmias after MI. Sprague-Dawley (SD) rats underwent ligation of the left anterior descending coronary artery before randomization to receive phosphate-buffered saline (PBS) or UB at doses of 2.5 mg/kg/day and 5 mg/kg/day via intraperitoneal administration or sham ligation. Cardiac function was assessed using echocardiography, haemodynamic detection and brain natriuretic peptide (BNP) levels 2 weeks post-MI. Hearts were used for electrophysiological testing and molecular and histological analyses. UB (5 mg/kg/day) significantly protected against post-MI cardiac dysfunction. UB markedly reduced infarct areas and myocyte size and attenuated cardiac fibrosis and inflammation post-MI. UB decreased the incidence of ventricular tachycardia and ventricular fibrillation compared to the MI group. We determined that ...
Source: European Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Eur J Pharmacol Source Type: research