Dilated cardiomyopathy and impaired cardiac hypertrophic response to angiotensin II in mice lacking FGF-2.

Details

Serval ID
serval:BIB_024B0CA51937
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Dilated cardiomyopathy and impaired cardiac hypertrophic response to angiotensin II in mice lacking FGF-2.
Journal
Journal of Clinical Investigation
Author(s)
Pellieux C., Foletti A., Peduto G., Aubert J.F., Nussberger J., Beermann F., Brunner H.R., Pedrazzini T.
ISSN
0021-9738
Publication state
Published
Issued date
2001
Peer-reviewed
Oui
Volume
108
Number
12
Pages
1843-1851
Language
english
Notes
Publication types: Journal Article
Abstract
FGF-2 has been implicated in the cardiac response to hypertrophic stimuli. Angiotensin II (Ang II) contributes to maintain elevated blood pressure in hypertensive individuals and exerts direct trophic effects on cardiac cells. However, the role of FGF-2 in Ang II-induced cardiac hypertrophy has not been established. Therefore, mice deficient in FGF-2 expression were studied using a model of Ang II-dependent hypertension and cardiac hypertrophy. Echocardiographic measurements show the presence of dilated cardiomyopathy in normotensive mice lacking FGF-2. Moreover, hypertensive mice without FGF-2 developed no compensatory cardiac hypertrophy. In wild-type mice, hypertrophy was associated with a stimulation of the c-Jun N-terminal kinase, the extracellular signal regulated kinase, and the p38 kinase pathways. In contrast, mitogen-activated protein kinase (MAPK) activation was markedly attenuated in FGF-2-deficient mice. In vitro, FGF-2 of fibroblast origin was demonstrated to be essential in the paracrine stimulation of MAPK activation in cardiomyocytes. Indeed, fibroblasts lacking FGF-2 expression have a defective capacity for releasing growth factors to induce hypertrophic responses in cardiomyocytes. Therefore, these results identify the cardiac fibroblast population as a primary integrator of hypertrophic stimuli in the heart, and suggest that FGF-2 is a crucial mediator of cardiac hypertrophy via autocrine/paracrine actions on cardiac cells.
Keywords
Angiotensin II, Animals, Cardiomegaly, Cardiomyopathy, Dilated, Cells, Cultured, Enzyme Activation, Fibroblast Growth Factor 2, Male, Mice, Mice, Inbred C57BL, Mitogen-Activated Protein Kinases, Myocardium
Pubmed
Web of science
Open Access
Yes
Create date
05/03/2008 16:39
Last modification date
20/08/2019 12:24
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