alexa Phosphoinositide 3-kinase in disease: timing, location, and scaffolding.


Journal of Clinical & Experimental Pathology

Author(s): Wymann MP, Marone R

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Abstract When PI3Ks are deregulated by aberrant surface receptors or modulators, accumulation of PtdIns(3,4,5)P3 leads to increased cell growth, proliferation and contact-independent survival. The PI3K/PKB/TOR axis controls protein synthesis and growth, while PtdIns(3,4,5)P3-mediated activation of Rho GTPases directs cell motility. PI3K activity has been linked to the formation of tumors, metastasis, chronic inflammation, allergy and cardiovascular disease. Although increased PtdIns(3,4,5)P3 is a well-established cause of disease, it is seldom known which PI3K isoform is implied. Recent work has demonstrated that PI3Kgamma contributes to the control of cAMP levels in the cardiac system, where the protein acts as a scaffold, but not as a lipid kinase. This article was published in Curr Opin Cell Biol and referenced in Journal of Clinical & Experimental Pathology

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