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Review Article mTOR Pathway and mTOR Inhibitors in Head and Neck Cancer

By Isrn Otolaryngology, Wei Gao, John Zeng, Hong Li, Jimmy Yu, Wai Chan, Wai Kuen Ho and Thian-sze Wong


permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Head and neck cancer is the sixthmost common type of Cancer worldwide. Since conventional treatment regimens are nonselective and are associated with systemic toxicities, intense investigations focus on molecular targeted therapy with high selectivity and low adverse effects. mTOR signaling pathway has been found to be activated in head and neck cancer, making it attractive for targeted therapy. In addition, expression levels of mTOR and downstream targets eIF4E, 4EBP1, S6K1, and S6 are potential diagnostic and prognostic biomarkers for head and neck cancer. mTOR inhibitors, such as rapamycin and its derivatives temsirolimus and everolimus, exhibit inhibitory effects on head and neck cancer in both in vitro cell line model and in vivo xenograft model. A large number of clinical trials have been initiated to evaluate the therapeutic effects of mTOR inhibitors on patients with head and neck cancer. mTOR inhibitor has potential as a single therapeutic agent or in combination with radiation, chemotherapeutic agents, or other targeted therapeutic agents to obtain synergistic repression on head and neck cancer. 1

Year: 2016
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