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- W2159505514 abstract "The PTEN/PI3K signaling pathway regulates a vast array of fundamental cellular responses. We show that cardiomyocyte-specific inactivation of tumor suppressor PTEN results in hypertrophy, and unexpectedly, a dramatic decrease in cardiac contractility. Analysis of double-mutant mice revealed that the cardiac hypertrophy and the contractility defects could be genetically uncoupled. PI3Kalpha mediates the alteration in cell size while PI3Kgamma acts as a negative regulator of cardiac contractility. Mechanistically, PI3Kgamma inhibits cAMP production and hypercontractility can be reverted by blocking cAMP function. These data show that PTEN has an important in vivo role in cardiomyocyte hypertrophy and GPCR signaling and identify a function for the PTEN-PI3Kgamma pathway in the modulation of heart muscle contractility." @default.
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- W2159505514 date "2002-09-01" @default.
- W2159505514 modified "2023-10-12" @default.
- W2159505514 title "Regulation of Myocardial Contractility and Cell Size by Distinct PI3K-PTEN Signaling Pathways" @default.
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- W2159505514 doi "https://doi.org/10.1016/s0092-8674(02)00969-8" @default.
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