AIM:To investigate the effect of inward rectifier potassium channels(I_(K1)) agonist zacopride on isoproterenol(Iso)-induced ventricular remodeling and the involved mechanisms.METHODS:SD rats were randomly divided into 5 groups:control,Iso model,Iso + zacopride,Iso + zacopride + chloroquine and Iso + captopril groups.The model of cardiac hypertrophy was developed by intraperitoneal injection of Iso(3 mg·kg~(-1)·d~(-1) for 10 d) and verified by determination of heart-to-body weight ratio and left ventricle-t...
RMP and shortened APD(P<0.01).At the same time,application of low dose of IK1atagonist chloroquine reversed theeffect of zacopride.In cultured neonatal rat cardiomyocytes,Iso increased the cell area and[Ca2+]i.Zacopride treatmentrestored the hypertrophic