PMID: 9428623Jan 15, 1998Paper

Various hypertrophic stimuli induce distinct phenotypes in cardiomyocytes

Journal of Molecular Medicine : Official Organ of the Gesellschaft Deutscher Naturforscher Und Ärzte
M C SchaubH M Eppenberger

Abstract

Cardiac hypertrophy is characterized by an increase in cell size in the absence of cell division and is accompanied by a number of qualitative and quantitative changes in gene expression. Most forms of hypertrophy in vivo are compensatory or adaptative responses to increased workload resulting from various physiological and/or pathological etiologies. Until severe pathological alterations become apparent, myocytes show no drastic morphological changes. On the level of gene expression, upregulation of the so-called fetal genes, i.e., beta-myosin heavy chain, alpha-skeletal and alpha-smooth muscle actin, and atrial natriuretic factor (ANF) may be observed concomitant with a downregulation of alpha-myosin heavy chain and the Ca pump of sarcoplasmic reticulum. The use of primary cell culture systems for cardiomyocytes as an in vitro model for the hypertrophic reaction has identified a number of different stimuli as mediators of cardiac myocyte hypertrophy. The molecular dissection of the different intracellular signaling pathways involved herein has uncovered a number of branching points to cytosolic and nuclear targets and has identified many interactions between these pathways. The individual administration of these hypertrophic ...Continue Reading

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