title: Nipradilol can prevent left ventricular systolic and diastolic dysfunction after myocardial infarction in rats.
abstract: The purpose of this study was to examine the effects of nipradilol on the cardiac function and mRNA expression in Wistar rats with a myocardial infarction (MI) that was created by ligation of the anterior descending coronary. Ten mg x kg(-1) x day(-1) of nipradilol were administrated to the rats in random order, and hemodynamic and Doppler-echocardiographic findings and myocardial mRNA expression were analyzed at 4 weeks after MI. Although left ventricular end-diastolic pressure (LVEDP) and central venous pressure (CVP) were increased in the MI rats, nipradilol significantly reduced the degree of the increase in both parameters. MI also significantly increased the weight of the left and right ventricles, and increased the left ventricular end-diastolic dimension (LVDd), effects that were attenuated by nipradilol. The MI rats showed decreased fractional shortening as systolic dysfunction and decreased E wave deceleration rate as diastolic dysfunction, and nipradilol significantly prevented these. Nipradilol significantly suppressed the increase in the non-infarcted myocardial mRNA expression of atrial natriuretic peptide, brain natriuretic peptide and collagen I and III. In conclusions, nipradilol prevents the cardiac remodeling that is accompanied by systolic and diastolic dysfunction, and inhibits abnormal myocardial gene expression after MI.
authors.affiliation: Department of Internal Medicine, Graduate School of Medicine, Osaka City University, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Izutani
authors.forename: Minoru
authors.initials: M
authors.lastname: Yoshiyama
authors.forename: Takashi
authors.initials: T
authors.lastname: Omura
authors.forename: Ken
authors.initials: K
authors.lastname: Yoshida
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Shokei
authors.initials: S
authors.lastname: Kim
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Takeuchi
authors.forename: Junichi
authors.initials: J
authors.lastname: Yoshikawa
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000494:pharmacology* / Q000627:therapeutic use; D000818:Animals; D009320:Atrial Natriuretic Factor / Q000235:genetics; D015415:Biomarkers / Q000032:analysis; D024042:Collagen Type I / Q000032:analysis; D024061:Collagen Type III / Q000032:analysis; D004195:Disease Models, Animal; D015150:Echocardiography, Doppler; D009203:Myocardial Infarction / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D020097:Natriuretic Peptide, Brain / Q000235:genetics; D011412:Propanolamines / Q000494:pharmacology* / Q000627:therapeutic use; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017208:Rats, Wistar; D018487:Ventricular Dysfunction, Left / Q000188:drug therapy / Q000378:metabolism / Q000517:prevention & control*; D020257:Ventricular Remodeling / Q000187:drug effects
chemical_list: D000319:Adrenergic beta-Antagonists; D015415:Biomarkers; D024042:Collagen Type I; D024061:Collagen Type III; D011412:Propanolamines; D012333:RNA, Messenger; D020097:Natriuretic Peptide, Brain; D009320:Atrial Natriuretic Factor; C036089:nipradilol