Compound 401 is a potent inhibitor of DNA-PK (IC50=0.28 μM). Compound 401 is reported to be a poor inhibitor of PI3K, ATM, and ATR in vitro, but it is active against mTOR. Compound 401 shows activity against mTOR (IC50=5.3 μM) but not p110α/p85α PI3K (IC50>100 μM). Treatment of cells with Compound 401 blocks the phosphorylation of sites modified by mTOR-Raptor and mTOR-Rictor complexes (ribosomal protein S6 kinase 1 Thr389 and Akt Ser473, respectively). By contrast, there is no direct inhibition of Akt Thr308 phosphorylation, which is dependent on PI3K. Similar effects are also observed in cells that lack DNA-PK. Compound 401 inhibits immunoprecipitated epitope-tagged mTOR or endogenous mTOR in Raptor immunoprecipitates. In both cases, inhibition of 67% or 78% is obtained at 5 μM or 10 μM Compound 401, respectively. By contrast, dose response curves show that the p110α/p85α or p110β/p85α PI3K complexes are poorly inhibited by Compound 401 at these concentrations. The proliferation of TSC1-/- fibroblasts is inhibited in the presence of Compound 401, but TSC1+/+ cells are resistant.
| Cell Experiment | |
|---|---|
| Cell lines | COS7 cells |
| Preparation method | Twenty-two hours later the cells were preincubated for 20 min with 0.1% dimethyl sulfoxide (Con) or the indicated concentrations of 401 (in μM). |
| Concentrations | 25 μM |
| Incubation time | 22 h |
| Animal Experiment | |
|---|---|
| Animal models | |
| Formulation | |
| Dosages | |
| Administration | |
| Molecular Weight | 281.31 |
| Formula | C16H15N3O2 |
| CAS Number | 168425-64-7 |
| Solubility (25°C) | 6 mg/mL in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related DNA-PK Products |
|---|
| ZL-2201
ZL-2201 is a potent DNA-PK inhibitor with an IC50 of 1 nM. |
| AMA-37
AMA-37, an Arylmorpholine analog, is ATP-competitive DNA-PK inhibitor, with IC50 values of 0.27 μM (DNA-PK), 32 μM (p110α), 3.7 μM (p110β), and 22 μM (p110γ), respectively. |
| PIK-75
PIK-75 is a reversible DNA-PK and p110α-selective inhibitor, which inhibits DNA-PK, p110α and p110γ with IC50s of 2, 5.8 and 76 nM, respectively. PIK-75 inhibits p110α >200-fold more potently than p110β (IC50=1.3 μM). PIK-75 induces apoptosis. |
| BAY-8400
The DNA-PK inhibitor BAY-8400 is an orally active and selective inhibitor of DNA-PK kinase that synergistically enhances the efficacy of radiotherapeutic agents in xenograft models. |
| STL127705
STL127705 (Compound L) is a Ku 70/80 heterodimer protein inhibitor, inhibits Ku70/80-DNA interaction, with an IC50 of 3.5 μM. STL127705 also inhibits Ku-dependent activation of DNA-PKCS kinase (IC50, 2.5 μM). |
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