Effects of BDF 9198 on left ventricular contractility in advanced spontaneously hypertensive rats with heart failure

Doggrell, Sheila A. (2002) Effects of BDF 9198 on left ventricular contractility in advanced spontaneously hypertensive rats with heart failure. Journal of Pharmacy And Pharmacology, 54 8: 1097-1102. doi:10.1211/002235702320266253


Author Doggrell, Sheila A.
Title Effects of BDF 9198 on left ventricular contractility in advanced spontaneously hypertensive rats with heart failure
Journal name Journal of Pharmacy And Pharmacology   Check publisher's open access policy
ISSN 0022-3573
Publication date 2002-08-01
Sub-type Article (original research)
DOI 10.1211/002235702320266253
Volume 54
Issue 8
Start page 1097
End page 1102
Total pages 6
Editor D. Jones
D. Craig
Place of publication London
Publisher Pharmaceutical Press
Language eng
Subject C1
320503 Clinical Pharmacology and Therapeutics
730106 Cardiovascular system and diseases
Abstract In the first part of this study, we characterized 24-month-old Wistar Kyoto (WKY) rats and spontaneously hypertensive rats (SHRs), their heart weights, and the responses of the isolated left ventricles to electrical stimulation. In the main part of the study, we tested whether the positive inotropic effects of BDF 9198, which prevents the closure of the cardiac sodium channel, were present in senescence and heart failure. Thus, we studied the effects of BDF 9198 on the left ventricle strips of 24-month-old WKY rats (senescence) and SHRs using contractility methods. In comparison with WKY rats, the left ventricles of 24-month-old SHRs were hypertrophied and had prolonged times to peak contraction. BDF 9198 (10(-8) to 10(-6) m) was a positive inotrope on the left ventricles of WKY rats, with a maximum augmenting effect of 122% with BDF 9198 at 10(-7) m. The magnitude of the augmenting effects of BDF 9198 were reduced in SHR heart failure, with a maximum augmenting effect of 26% at 10(-7) m. BDF 9198 at 10(-6) m attenuated the responses of the SHR left ventricle to electrical stimulation. In conclusion, the potential of drugs that prevent closure of the sodium channel as positive inotropes in the treatment of heart failure should be further considered.
Keyword Pharmacology & Pharmacy
Action-potentials
Myocardium
Bdf-9198
Myocytes
Channel
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Medicine Publications
 
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Created: Wed, 15 Aug 2007, 04:59:06 EST