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Moderate inappropriately high aldosterone/NaCl constellation in mice: cardiovascular effects and the role of cardiovascular epidermal growth factor receptor

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Item Type:Article
Title:Moderate inappropriately high aldosterone/NaCl constellation in mice: cardiovascular effects and the role of cardiovascular epidermal growth factor receptor
Creators Name:Schreier, B. and Rabe, S. and Winter, S. and Ruhs, S. and Mildenberger, S. and Schneider, B. and Sibilia, M. and Gotthardt, M. and Kempe, S. and Mäder, K. and Grossmann, C. and Gekle, M.
Abstract:Non-physiological activation of the mineralocorticoid receptor (MR), e.g. by aldosterone under conditions of high salt intake, contributes to the pathogenesis of cardiovascular diseases, although beneficial effects of aldosterone also have been described. The epidermal growth factor receptor (EGFR) contributes to cardiovascular alterations and mediates part of the MR effects. Recently, we showed that EGFR is required for physiological homeostasis and function of heart and arteries in adult animals. We hypothesize that moderate high aldosterone/NaCl, at normal blood pressure, affects the cardiovascular system depending on cardiovascular EGFR. Therefore we performed an experimental series in male and female animals each, using a recently established mouse model with EGFR knockout in vascular smooth muscle cells and cardiomyocytes and determined the effects of a mild-high aldosterone-to-NaCl constellation on a.o. marker gene expression, heart size, systolic blood pressure, impulse conduction and heart rate. Our data show that (i) cardiac tissue of male but not of female mice is sensitive to mild aldosterone/NaCl treatment, (ii) EGFR knockout induces stronger cardiac disturbances in male as compared to female animals and (iii) mild aldosterone/NaCl treatment requires the EGFR in order to disturb cardiac tissue homeostasis whereas beneficial effects of aldosterone seem to be independent of EGFR.
Keywords:Aldosterone, Biological Markers, Epidermal Growth Factor Receptor, Homeostasis, Myocardium, Sodium Chloride, Transcriptome, Animals, Mice
Source:Scientific Reports
ISSN:2045-2322
Publisher:Nature Publishing Group
Volume:4
Page Range:7430
Date:11 December 2014
Official Publication:https://doi.org/10.1038/srep07430
PubMed:View item in PubMed

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