Cardioprotective effect of propranolol from alcohol-induced heart muscle damage as assessed by plasma cardiac troponin-T.

Patel, Vinood B., Ajmal, Raheela, Sherwood, Roy, Sullivan, Andrew, Richardson, Peter and Preedy, Victor R. (2001) Cardioprotective effect of propranolol from alcohol-induced heart muscle damage as assessed by plasma cardiac troponin-T. Alcoholism: Clinical and Experimental Research, 25 (6). pp. 882-889. ISSN 0145-6008

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Background: Heavy alcohol consumption from either long-term misuse or binge drinking is associated with poor cardiac contractility, mitochondrial dysfunction, and ventricular arrhythmias. The aim of this study was to measure circulating cardiac troponin-T as a marker for myocardial damage following acute and chronic alcohol administration. Methods: In acute studies, male Wistar rats were treated with alcohol (75 mmol/kg body weight, intraperitoneal) and plasma was collected 2.5 hr after alcohol administration for analysis of rat cardiac troponin-T. In addition, rats were pretreated with cyanamide (an inhibitor of acetaldehyde dehydrogenase), various beta-blockers, xanthine oxidase inhibitors, or lisinopril before acute alcohol dosing. In chronic studies, rats were fed alcohol (as 35% of total dietary calories) for 6 weeks. Results: The results of the time course study showed that acute alcohol administration significantly raised plasma cardiac troponin-T levels after 2.5 hr and 6 hr, but not after 24 hr. The effects of alcohol on cardiac troponin-T were potentiated with cyanamide pretreatment. Acute ethanol, alone or with cyanamide pretreatment, decreased systolic blood pressure and increased heart rates. Beta-blocker pretreatment with propranolol reduced the alcohol-induced increase in plasma troponin-T, whereas lisinopril potentiated this effect. The beta-blockers, atenolol and metoprolol, and the xanthine oxidase inhibitors, allopurinol and oxypurinol, were unable to reduce elevated troponin-T. However, pretreatment with the beta-blocker timolol moderated the acute alcohol-induced increase in troponin-T. In the chronic alcohol rat model, no differences were observed between alcohol and control pair-fed rats, suggesting the inducement of tolerance.

Item Type: Article
Additional Information: Online ISSN 1530-0277
Subjects: University of Westminster > Science and Technology > Life Sciences, School of (No longer in use)
Depositing User: Users 4 not found.
Date Deposited: 17 Aug 2005
Last Modified: 07 Jun 2010 11:43

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