期刊
EXPERT OPINION ON INVESTIGATIONAL DRUGS
卷 19, 期 8, 页码 919-930出版社
INFORMA HEALTHCARE
DOI: 10.1517/13543784.2010.499121
关键词
angiogenesis; drug resistance; mTOR; targeted therapy
资金
- AstraZeneca
- Pfizer
- AAREC (Association d'Aide a la Recherche et l'Enseignement en Cancerologie), Beaujon, Clichy, France
Importance of the field: Contrasting with the broad activation of the PI3K/AKT/mammalian target of rapamycin (mTOR) survival pathway in most cancer, activity of rapalogues appears to be restricted to a few tumor types. Areas covered in this review: The analysis of molecular activity of the PI3K/AKT/mTOR pathway and resistance mechanisms of rapamycin and rapalogues led to the development of several inhibitory molecules. What the reader will gain: New anticancer agents including PI3K inhibitors, dual PI3K/mTOR inhibitors, specific mTOR inhibitors, and AKT inhibitors may have direct inhibitory effects on targets by competing with ATP or may be non-ATP-competitive allosteric modulators of protein functions. In addition, another way of blocking the abnormal activation of the PI3K/AKT/mTOR pathway may be achieved by using HSP90 inhibitors. In this paper we review novel drugs inhibiting the mTOR signaling pathway. Take home message: Several trials are ongoing with novel drugs targeting key kinases involved in the mTOR pathway. Benchmarking those agents with rapalogues in rationally designed preclinical models and conceiving clinical trials in everolimus/temsirolimus-sensitive tumor types may help to identify drugs with a real clinical potential. Understanding mechanisms associated with primary and acquired resistance to rapalogues may help to enlarge indications and provide a rationale for designing combinations that will minimize the risk of developing resistance to rapalogues.
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