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mTOR and Cancer Therapy: Clinical Development and Novel Prospects

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Part of the book series: Cancer Drug Discovery and Development ((CDD&D))

Abstract

mTOR, a pivotal signal transduction protein involved in multiple cellular functions in tumors at the level of cancer and stroma cells, represents an attractive target for cancer therapy. Rapamycin and several rapamycin derivatives (rapalogs), inhibiting mTOR function by a kinase-independent mechanism, have been tested in clinical trials in several tumor types. The proof of principle that rapalogs can improve survival has been obtained in patients with advanced poor prognosis renal cell carcinoma and mantle cell lymphoma. How to further explore potential novel indications of rapalogs in the clinic remains challenging and may help accelerating the development of novel mTOR kinase inhibitors. In this review, current data and limitations of rapalogs in terms of doses, schedules, and pharmacokinetics are summarized. Novel pharmacodynamic endpoints that may help the development of rapalogs in clinical trials are also reviewed. Finally, based on current knowledge of tumor biology and clinical results in phase I–II trials, we update potential novel indications for mTOR inhibitors given either as single agent or in combination with other anticancer drugs.

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Correspondence to Sandrine Faivre .

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Faivre, S., Decaens, T., Raymond, E. (2009). mTOR and Cancer Therapy: Clinical Development and Novel Prospects. In: Polunovsky, V., Houghton, P. (eds) mTOR Pathway and mTOR Inhibitors in Cancer Therapy. Cancer Drug Discovery and Development. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60327-271-1_7

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  • DOI: https://doi.org/10.1007/978-1-60327-271-1_7

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