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Cardiovasc Res. 2004 Aug 15;63(3):403-13.

Ras, PI3-kinase and mTOR signaling in cardiac hypertrophy.

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  • 1Division of Molecular Physiology, Faculty of Life Sciences, University of Dundee, Dundee DD1 5EH, UK. c.g.proud@dundee.ac.uk

Abstract

Cardiac hypertrophy involves increased mass (growth) of the heart and a cardinal feature of this condition is increased rates of protein synthesis. Several signaling pathways have been implicated in cardiac hypertrophy including the phosphatidylinositol 3-kinase (PI3K) and Ras/Raf/MEK/Erk pathways. PI3K lies upstream of the mammalian target of rapamycin (mTOR), an important positive regulator of protein synthesis and cell growth. However, recent data suggest that, in response to certain hypertrophic agents, signaling via Ras and MEK/Erk, as well as mTOR, is required for activation of protein synthesis, indicating new connections between these key signaling pathways.

Copryright 2004 European Society of Cardiology

PMID:
15276465
[PubMed - indexed for MEDLINE]
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