Home PI3K/Akt/mTOR mTOR inhibitor KU-0063794 For research use only.

KU-0063794

KU-0063794 is a potent and highly specific dual-mTOR inhibitor of mTORC1 and mTORC2 with IC50 of ~10 nM in cell-free assays; no effect on PI3Ks.

KU-0063794 Chemical Structure

KU-0063794 Chemical Structure

CAS No. 938440-64-3

Purity & Quality Control

KU-0063794 Related Products

Signaling Pathway

mTOR Signaling Pathways

mTOR Signaling Pathway

Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
HepG2  Cell Viability Assay 0.1–50 μM 72 h decreases cell viability in a dose dependent manner 26278819
HepG2  Colony Formation Assay 1–50 μM 10 d decreases the number of viable HepG2 colonies significantly 26278819
HepG2  Apoptosis Assay 0.1–50 μM 48 h induces apoptosis in a dose dependent manner 26278819
HepG2  Function Assay 5/10 μM 24 h dramatically inhibits phosphorylation of AKT at Ser-473 26278819
HepG2  Function Assay 5/10 μM 24 h downregulates the levels HIF1α and cyclin D1  26278819
HepG2  Function Assay 0.1–50 μM 24 h induces p62 downregulation, Beclin-1 expression and LC3B-I to LC3B-II conversion in a dose dependent manner 26278819
HepG3  Function Assay 0.1–50 μM 48 h induces cell autophagy in a dose dependent manner 26278819
AGS Growth Inhibition Assay IC50=15.0 ± 2.91 μM 24597478
HGC27 Growth Inhibition Assay IC50=15.0 ± 4.82 μM 24597478
MKN45 Growth Inhibition Assay IC50=0.82 ± 0.01 μM 24597478
NUGC4 Growth Inhibition Assay IC50=2.93 ± 0.31 μM 24597478
PC9 Growth Inhibition Assay 72 h IC50=10.15±0.62 nM 23874880
PC9GR Growth Inhibition Assay 72 h IC50=6.21±1.30 nM 23874880
H1650 Growth Inhibition Assay 72 h IC50=7.61±0.62 nM 23874880
H1975 Growth Inhibition Assay 72 h IC50=11.15±0.93 nM 23874880
PC9 Function Assay 10.15 nM 72 h inhibits mTOR phosphorylation status  23874880
PC9GR Function Assay 6.21 nM 72 h inhibits mTOR phosphorylation status  23874880
H1650 Function Assay 7.61 nM 72 h inhibits mTOR phosphorylation status  23874880
H1975 Function Assay 11.15 nM 72 h inhibits mTOR phosphorylation status  23874880
PC9 Function Assay 10.15 nM 72 h inhibits phosphorylation of p70S6K 23874880
PC9GR Function Assay 6.21 nM 72 h inhibits phosphorylation of p70S6K 23874880
H1650 Function Assay 7.61 nM 72 h inhibits phosphorylation of p70S6K 23874880
H1975 Function Assay 11.15 nM 72 h inhibits phosphorylation of p70S6K 23874880
LNCaP Cell Viability Assay 0-10 μM 24 h  decreases cell viability in a dose dependent manner 23840605
PC-3 Cell Viability Assay 0-10 μM 24 h  decreases cell viability in a dose dependent manner 23840605
MDA-MB-468  Cell Viability Assay 0-10 μM 24 h  decreases cell viability in a dose dependent manner 23840605
LNCaP Function Assay 200–800 nM 24 h  decreases the phosphorylation level of p70S6K in a dose dependent manner 23840605
PC-3 Function Assay 200–800 nM 24 h  decreases the phosphorylation level of p70S6K in a dose dependent manner 23840605
MDA-MB-468  Function Assay 200–800 nM 24 h  decreases the phosphorylation level of p70S6K in a dose dependent manner 23840605
Caki-1  Function Assay 100-2000 nM 10-180 min DMSO inhibits both mTORC1 and mTORC2 as indicated by the decrease in phosphorylation of downstream effectors 23349989
786-O Function Assay 100-2000 nM 10-180 min DMSO inhibits both mTORC1 and mTORC2 as indicated by the decrease in phosphorylation of downstream effectors 23349989
Caki-1  Cell Viability Assay 300-4000 nM 24-96 h DMSO suppresses the cell viability in both time and dose dependent manner 23349989
786-O Cell Viability Assay 300-4000 nM 24-96 h DMSO suppresses the cell viability in both time and dose dependent manner 23349989
Caki-1  Function Assay 2 µM 72 h DMSO induces G1 cell cycle arrest and autophagy 23349989
786-O Function Assay 2 µM 72 h DMSO induces G1 cell cycle arrest and autophagy 23349989
HEK293 Function assay 2 hrs Inhibition of recombinant FLAG-tagged mTOR expressed in HEK293 cells using biotinylated p70S6K substrate after 2 hrs by alphascreen competition assay, IC50=0.003μM 19762236
HBCx-10 Function assay 5 mg/kg Potentiation of irinotecan-induced tumor regression against human HBCx-10 cells xenografted in immunocompromised mouse at 5 mg/kg, po qd administered on days 1 to 3 of weekly cycle 19762236
U87MG Function assay 2 hrs Inhibition of mTORC1 in human U87MG cells assessed as phosphorylated S6 ribosomal protein (Ser235/236) level after 2 hrs by Western blotting, IC50=0.1μM 19762236
U87MG Function assay 2 hrs Inhibition of mTORC2 in human U87MG cells assessed as phosphorylated AKT (Ser473) level after 2 hrs by Western blotting, IC50=0.15μM 19762236
T47D Antiproliferative assay 120 hrs Antiproliferative activity against human T47D cells after 120 hrs by SRB assay, GI50=0.35μM 19762236
HEK293 Function assay Inhibition of recombinant FLAG-tagged mTOR (1362 to 2549) (unknown origin) expressed in HEK293 cells, IC50=0.0025μM 23375793
MDA-MB-468 Function assay 2 hrs Inhibition of mTORC2 in human MDA-MB-468 cells assessed as reduction of AKT phosphorylation at Ser473 after 2 hrs, IC50=0.24μM 23375793
MDA-MB-468 Function assay 2 hrs Inhibition of mTORC1 in human MDA-MB-468 cells assessed as reduction of pS6 phosphorylation at Ser235/236 after 2 hrs, IC50=0.66μM 23375793
HEK293 Function assay 30 mins Inhibition of mTORC1 in HEK293 cells using GST-tagged S6K1 or Akt1 as substrate after 30 mins by immunoblotting assay, IC50=0.01μM 29211480
PC3 Function assay 100 mg/kg Inhibition of Akt phosphorylation at Ser473 in PTEN-deficient human PC3 cells xenograft mouse model at 100 mg/kg, po single dose measured up to 8 hrs 29211480
PC3 Antitumor assay 30 mg/kg Antitumor activity against human PC3 cells xenograft mouse model assessed as inhibition of tumor growth at 30 mg/kg, po bid in presence of 1-aminobenzotriazole 29211480
PC3 Antitumor assay 60 mg/kg Antitumor activity against human PC3 cells xenograft mouse model assessed as inhibition of tumor growth at 60 mg/kg, po bid in presence of 1-aminobenzotriazole 29211480
HEK293 Function assay 30 mins Inhibition of mTORC2 in HEK293 cells using GST-tagged S6K1 or Akt1 as substrate after 30 mins by immunoblotting assay, IC50=0.01μM 29211480
SW620 Function assay 20 mg/kg Potentiation of irinotecan-induced tumor regression against human SW620 cells xenografted in immunocompromised mouse at 20 mg/kg, po qd administered on days 2 to 4 of weekly cycle 29211480
SJ-GBM2 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells 29435139
A673 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells 29435139
SK-N-MC qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells 29435139
BT-37 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for BT-37 cells 29435139
NB-EBc1 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells 29435139
OHS-50 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells 29435139
MG 63 (6-TG R) qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for MG 63 (6-TG R) cells 29435139
Rh41 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh41 cells 29435139
A673 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for A673 cells) 29435139
BT-12 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for BT-12 cells 29435139
DAOY qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for DAOY cells 29435139
SJ-GBM2 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SJ-GBM2 cells 29435139
U-2 OS qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for U-2 OS cells 29435139
Rh41 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh41 cells 29435139
RD qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for RD cells 29435139
Rh18 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh18 cells 29435139
Rh30 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh30 cells 29435139
SK-N-SH qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-SH cells 29435139
Click to View More Cell Line Experimental Data

Biological Activity

Description KU-0063794 is a potent and highly specific dual-mTOR inhibitor of mTORC1 and mTORC2 with IC50 of ~10 nM in cell-free assays; no effect on PI3Ks.
Targets
mTORC1 [1]
(Cell-free assay)		 mTORC2 [1]
(Cell-free assay)
~10 nM ~10 nM
In vitro
In vitro

Compared with the mTOR inhibitor PP242, KU-0063794 exhibits higher specificity for mTOR, as being inactive against PI3Ks or 76 other kinases. In HEK-293 cells, KU-0063794 at 30 nM is sufficient to rapidly ablate S6K1 activity by blocking the phosphorylation of the hydrophobic motif (Thr389) and subsequently the phosphorylation of the T-loop residue (Thr229). In case of IGF1 stimulation of serum-starved HEK-293 cells, 300 nM of KU-0063794 is needed to inhibit the S6K1 activity by ~90%. KU-0063794 at 100-300 nM also completely inhibits the amino-acid-induced phosphorylation of S6K1 and S6 protein. Similar to S6K1, KU-0063794 inhibits the phosphorylation of mTORC1 at Ser2448 and mTORC2 at Ser2481 in a dose-dependent and time-dependent manner. In the presence of serum or following IGF1 stimulation, KU-0063794 induces a dose-dependent inhibition of the activity and phosphorylation of Akt at Ser473 and unexpected Thr308 as well as the phosphorylation of the Akt substrates PRAS40 at Thr246, GSK3α/GSK3β at Ser21/Ser9 and Foxo-1/3a at Thr24/Thr32. KU-0063794 but not rapamycin inhibits SGK1 activity and Ser422 phosphorylation as well as its physiological substrate NDGR1 in a dose-dependent manner, to the same extent as S6K1 and Akt phosphorylation, whereas KU-0063794 dose not inhibit phorbol ester induced ERK or RSK phosphorylation and RSK activation. Compared with rapamycin, KU-0063794 exhibits more significant potency to induce the complete dephosphorylation of 4E-BP1 at Thr37, Thr46 and Ser65. KU-0063794 inhibits cell growth of both wild-type and mLST8-deficient MEFs and induces a G1 cell cycle arrest, more significantly than rapamycin. [1]
Kinase Assay mTOR complexes kinase assays
HEK-293 cells are freshly lysed in Hepes lysis buffer. Lysate (1-4 mg) is pre-cleared by incubating with 5-20 μL of Protein G-Sepharose conjugated to pre-immune IgG. The lysate extracts are then incubated with 5-20 μL of Protein G-Sepharose conjugated to 5-20 μg of either anti-Rictor or anti-Raptor antibody, or pre-immune IgG. All antibodies are covalently conjugated to Protein G-Sepharose. Immunoprecipitations are carried out for 1 hour at 4 °C on a vibrating platform. The immunoprecipitates are washed four times with Hepes lysis buffer, followed by two washes with Hepes kinase buffer. For Raptor immunoprecipitates used for phosphorylating S6K1, for the initial two wash steps the buffer includes 0.5 M NaCl to ensure optimal kinase activity. GST-Akt1 is isolated from serum-deprived HEK-293 cells incubated with PI-103 (1 μM for 1 hour). GST-S6K1 is purified from serum-deprived HEK-293 cells incubated with rapamycin (0.1 μM for 1 hour). mTOR reactions are initiated by adding 0.1 mM ATP and 10 mM MgCl2 in the presence of various concentrations of KU-0063794 and GST-Akt1 (0.5 μg) or GST-S6K1 (0.5 μg). Reaction are carried out for 30 minutes at 30 °C on a vibrating platform and stopped by addition of SDS sample buffer. Reaction mixtures are then filtered through a 0.22-μm-poresize Spin-X filter and samples are subjected to electrophoresis and immunoblot analysis with the indicated antibodies.
Cell Research Cell lines Wild-type and mLST8 deficient MEFs
Concentrations Dissolved in DMSO, final concentration ~3 μM
Incubation Time 24, 48, and 72 hours
Method

Cells are treated with KU-0063794 for 24, 48, and 72 hours, and the medium is changed every 24 hours with freshly dissolved KU-0063794. For the measurement of cell growth, cells are washed once with PBS, and fixed in 4% (v/v) paraformaldehyde in PBS for 15 minutes. After washing once with water, the cells are stained with 0.1% Crystal Violet in 10% ethanol for 20 minutes and washed three times with water. Crystal Violet is extracted from cells with 0.5 mL of 10% (v/v) ethanoic (acetic) acid for 20 minutes. The eluate is then diluted 1:10 in water and absorbance at 590 nm is quantified. For the assessment of cell cycle distribution, cells are harvested by trypsinization, washed once in PBS, and re-suspended in ice-cold aq. 70% (v/v) ethanol. Cells are washed twice in PBS plus 1% (w/v) BSA and stained for 20 minutes in PBS plus 0.1% (v/v) Triton X-100 containing 50 g/mL propidium iodide and 50 g/mL RNase A. The DNA content of cells is determined using a FACSCalibur flow cytometer and CellQuest software. Red fluorescence (585 nm) is acquired on a linear scale, and pulse width analysis is used to exclude doublets. Cell-cycle distribution is determined using FlowJo software.
Experimental Result Images Methods Biomarkers Images PMID
Western blot p-S6K / S6K / p-4E-BP1 / E7 / E6 / p53 p-mTOR 28115701
In Vivo
In vivo

Ku0063794 inhibits tumor growth and mTOR signaling in a preclinical renal cell carcinoma model. However, Ku0063794 was not more effective in the animal study. A possible explanation for lack of greater activity in vivo for Ku0063794[2].
Animal Research Animal Models Nu/Nu nude mice
Dosages 8 mg/kg
Administration i.p.

Chemical Information & Solubility

Molecular Weight 465.54 Formula

C25H31N5O4
CAS No. 938440-64-3 SDF Download KU-0063794 SDF
Smiles CC1CN(CC(O1)C)C2=NC3=C(C=CC(=N3)C4=CC(=C(C=C4)OC)CO)C(=N2)N5CCOCC5
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 16 mg/mL ( (34.36 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 5 mg/mL

Water : Insoluble


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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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