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- W1978143312 abstract "Abstract The mammalian target of rapamycin (mTOR) is a serine/threonine protein kinase that exists in two complexes (mTORC1 and mTORC2) and integrates extracellular and intracellular signals to act as a master regulator of cell growth, survival, and metabolism. The PI3K/AKT/mTOR prosurvival pathway is often dysregulated in multiple sarcoma subtypes. First-generation allosteric inhibitors of mTORC1 (rapalogues) have been extensively tested with great preclinical promise, but have had limited clinical utility. Here, we report that MLN0128, a second-generation, ATP-competitive, pan-mTOR kinase inhibitor, acts on both mTORC1 and mTORC2 and has potent in vitro and in vivo antitumor activity in multiple sarcoma subtypes. In vitro, MLN0128 inhibits mTORC1/2 targets in a concentration-dependent fashion and shows striking antiproliferative effect in rhabdomyosarcoma (RMS), Ewing sarcoma, malignant peripheral nerve sheath tumor, synovial sarcoma, osteosarcoma, and liposarcoma. Unlike rapamycin, MLN0128 inhibits phosphorylation of 4EBP1 and NDRG1 as well as prevents the reactivation of pAKT that occurs via negative feedback release with mTORC1 inhibition alone. In xenograft models, MLN0128 treatment results in suppression of tumor growth with two dosing schedules (1 mg/kg daily and 3 mg/kg b.i.d. t.i.w.). At the 3 mg/kg dosing schedule, MLN0128 treatment results in significantly better tumor growth suppression than rapamycin in RMS and Ewing sarcoma models. In addition, MLN0128 induces apoptosis in models of RMS both in vitro and in vivo. Results from our study strongly suggest that MLN0128 treatment should be explored further as potential therapy for sarcoma. Mol Cancer Ther; 14(2); 395–406. ©2014 AACR." @default.
- W1978143312 created "2016-06-24" @default.
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- W1978143312 date "2015-02-01" @default.
- W1978143312 modified "2023-10-12" @default.
- W1978143312 title "MLN0128, an ATP-Competitive mTOR Kinase Inhibitor with Potent <i>In Vitro</i> and <i>In Vivo</i> Antitumor Activity, as Potential Therapy for Bone and Soft-Tissue Sarcoma" @default.
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- W1978143312 doi "https://doi.org/10.1158/1535-7163.mct-14-0711" @default.
- W1978143312 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4332837" @default.
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