For research use only. Not Intended for Therapeutic Use!
|IC50:||4 nM/5 nM/7 nM/75 nM/6 nM(p110α/γ/δ/β/mTOR) |
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BEZ235 tosylate(NVP-BEZ235) is a dual ATP-competitive PI3K and mTOR inhibitor for p110α/γ/δ/β and mTOR(p70S6K) with IC50 of 4 nM/5 nM/7 nM/75 nM/6 nM, respectively; inhibits ATR with IC50 of 21 nM; shown to be poor inhibitory to Akt and PDK1.
IC50 value: 4 nM/5 nM/7 nM/75 nM/6 nM(p110α/γ/δ/β/mTOR) 
in vitro: BEZ235 significantly reduces the phosphorylation levels of the mTOR activated kinase p70S6K. BEZ235 results in a reduction of S235/S236P-RPS6 levels with IC50 of 6.5 nM. The activity of BEZ23 against mTOR is determined using a biochemical mTOR K-LISA assay with IC50 of 20.7 nM. BEZ235 shows slightly lower activity against its β paralogue with IC50 of 75 nM. The PI3K/Akt/mTOR pathway is often constitutively activated in human tumor cells. BEZ235 blocks PI3K and mTOR kinase activity by binding to the ATP-binding cleft of these enzymes. Both PTEN-null cell lines PC3M and U87MG show a dose-dependent reduction in cell proliferation when treated with increasing concentrations of BEZ235 with an average GI50 of 10-12 nM . BEZ235 is an mTORC1/2 catalytic inhibitor .
in vivo: BEZ235 induces regression of the tumors (69%) without statistically significant effect on body weight gain. Altogether, these preliminary in vivo efficacy results show that BEZ235 causes disease stasis when administered orally as a single agent and can enhance the efficacy of other anticancer agents when used in combination studies .
. Maira SM, et al. Identification and characterization of NVP-BEZ235, a new orally available dual phosphatidylinositol 3-kinase/mammalian target of rapamycin inhibitor with potent in vivo antitumor activity. Mol Cancer Ther, 2008, 7(7), 1851-1863.
. Roper J, et al. The dual PI3K/mTOR inhibitor NVP-BEZ235 induces tumor regression in a genetically engineered mouse model of PIK3CA wild-type colorectal cancer. PLoS One, 2011, 6(9), e25132.