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High-dose 17β–estradiol treatment prevents development of heart failure post–myocardial infarction in the rat.

Authors :
Beer, Stephanie
Reincke, Martin
Kral, Maike
Callies, Frank
Strömer, Hinrik
Dienesch, Charlotte
Steinhauer, Sonja
Ertl, Georg
Allolio, Bruno
Neubauer, Stefan
Source :
Basic Research in Cardiology. Jan2007, Vol. 102 Issue 1, p9-18. 10p. 1 Diagram, 2 Charts, 1 Graph.
Publication Year :
2007

Abstract

Prognosis of heart failure remains poor despite therapeutic advances, such as angiotensin converting enzyme inhibition or β-receptor blockade. Thus, more effective forms of treatment are urgently needed. Since estrogens have been shown to modulate migration and proliferation of cardiac fibroblasts and to modulate the expression of estrogen receptors of cardiomyocytes we examined whether high-dose estrogen treatment can affect post-myocardial infarction left ventricular remodeling. Female rats were treated with 17β-estradiol (7.5 mg/90 d) or placebo for ten weeks, starting two weeks prior to experimental myocardial infarction. Eight weeks after infarction, in vivo echocardiographic and hemodynamic measurements as well as isolated heart perfusion were performed. In vivo, chronic estrogen treatment almost completely prevented the development of all signs of heart failure that occur in untreated infarcted hearts, such as increased left ventricular diameters (dilatation), reduced fractional shortening (systolic dysfunction) or increased left ventricular end–diastolic pressure (diastolic dysfunction). In vitro, the right- (indicating structural dilatation) and downward (indicating left ventricular dysfunction) shift of left ventricular pressure-volume curves occurring in untreated infarcted hearts was completely prevented by estrogen. High dose estradiol treatment prevented development of post-MI remodeling, as assessed by in vivo and in vitro parameters of LV dysfunction. Estrogen may hold the potential of becoming a new form of heart failure treatment.However, the mechanisms responsible for this striking and unexpected beneficial action of estrogen in heart failure remain to be elucidated. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03008428
Volume :
102
Issue :
1
Database :
Academic Search Index
Journal :
Basic Research in Cardiology
Publication Type :
Academic Journal
Accession number :
23460623
Full Text :
https://doi.org/10.1007/s00395-006-0608-1