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Acute effects of beta-blocker with intrinsic sympathomimetic activity on stress-induced cardiac dysfunction in rats.
MedLine Citation:
PMID:  22898333     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: We have reported that α and β adrenergic blockers could protect against emotional stress-induced cardiac dysfunction but those protective effects of β adrenergic blockers with intrinsic sympathomimetic activity (ISA), such as celiprolol, are unknown. The purpose of this study is to evaluate whether ISA could relate with this protective effect. METHODS AND RESULTS: Rats medicated with celiprolol (8mg/kg), metoprolol (4mg/kg), or vehicle, were restrained for 30min (immobilization stress: IMO) to reproduce emotional stress, and anesthetized to release stress. We measured the fractional area change (FAC) using an echocardiography (SONOS5500) with s12 probe (frequency: 5-12MHz, frame rate: 120Hz) at the end of IMO and every 10min for 1h. During IMO, FAC in rats with a premedication of metoprolol was lower than in those with a premedication of vehicle or celiprolol. At 20min after IMO, FAC in rats with a premedication of celiprolol was significantly higher than that with a premedication of metoprolol or vehicle (84±9% vs. 65±3% or 60±7%, p<0.05). At 60min after IMO, FAC in rats with a premedication of vehicle or celiprolol recovered, but FAC in rats with a premedication of metoprolol did not. CONCLUSION: Acute premedication with celiprolol could prevent a sudden drop of cardiac function after acute stress such as IMO. ISA might have an important role in preventing stress-induced cardiac dysfunction.
Authors:
Fuminobu Ishikura; Yuri Takano; Takashi Ueyama
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-13
Journal Detail:
Title:  Journal of cardiology     Volume:  -     ISSN:  1876-4738     ISO Abbreviation:  J Cardiol     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804703     Medline TA:  J Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Japanese College of Cardiology. Published by Elsevier Ltd. All rights reserved.
Affiliation:
School of Allied Health Sciences, Osaka University, Faculty of Medicine, Osaka, Japan.
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