• Methods Mol. Biol. · Jan 2012

    Inhibition of PI3K-Akt-mTOR signaling in glioblastoma by mTORC1/2 inhibitors.

    • Qi-Wen Fan and William A Weiss.
    • Department of Neurology, University of California, San Francisco, CA, USA. qiwen.fan@ucsf.edu
    • Methods Mol. Biol. 2012 Jan 1; 821: 349-59.

    AbstractAmplification of the gene encoding the epidermal growth factor receptor (EGFR) occurs commonly in glioblastoma (GBM), leading to activation of downstream kinases, including phosphatidylinositol 3'-kinase (PI3K), Akt, and mammalian target of rapamycin (mTOR). A serine-threonine kinase, mTOR controls cell growth by regulating mRNA translation, metabolism, and autophagy; acting as both a downstream effector and upstream regulator of PI3K. These signaling functions are distributed between at least two distinct complexes, mTORC1 and mTORC2 with respect to pathway specificity. We have investigated mTOR signaling in glioma cells with the allosteric mTORC1 inhibitor rapamycin, the mTORC1/2 inhibitor Ku-0063794, a dual PI3K/mTORC1/2 kinase inhibitor PI-103, and siRNA against raptor, rictor, or mTOR, and evaluated the value of mTOR inhibitors for the treatment of glioblastoma.

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