Molecular Weight(MW): 460.45
OSU-03012 (AR-12) is a potent inhibitor of recombinant PDK-1(phosphoinositide-dependent kinase 1) with IC50 of 5 μM in a cell-free assay and 2-fold increase in potency over OSU-02067.
Cited by 23 Publications
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|Description||OSU-03012 (AR-12) is a potent inhibitor of recombinant PDK-1(phosphoinositide-dependent kinase 1) with IC50 of 5 μM in a cell-free assay and 2-fold increase in potency over OSU-02067.|
|Features||A derivative of celecoxib with 10-fold greater antitumor activity, but lacks celecoxib's COX-2 inhibitory activity.|
OSU-03012 induces apoptotic death in PC-3 cells with IC50 of 5 µM and reduces the activity of immunoprecipitated p70S6K. OSU-03012 completely suppress cell growth in a diverse range of tumor cell lines at concentrations of 3–5 μm, as compared with the concentration of at least 50 μm required for celecoxib.  OSU-03012 promotes cell killing to a greater extent in glioma cells than in nontransformed astrocytes. OSU-03012 causes a dose-dependent induction of cell death that is not altered by p53 mutation, expression of ERBB1 VIII, or loss of phosphatase and tensin function due to a homolog deletion on chromosome 10. OSU-03012 and ionizing radiation cause an additive, caspase-independent elevation in cell killing. OSU-03012 lethality as a single agent or when combined with signaling modulators is not modified in cells lacking expression of BIM or of BAX/BAK. OSU-03012 promotes the release of cathepsin B from the lysosomal compartment and that of AIF from mitochondria. The lethality of OSU-03012 is attenuated in protein kinase R-like endoplasmic reticulum kinase-/- cells, which correlated with the reduced cleavage of BID and suppression of cathepsin B and AIF release into the cytosol.  OSU-03012 inhibits thyroid cancer cell (NPA, WRO, and ARO cells) proliferation, migration and induces apoptosis, which results in an increase of cells in the S phase without an increase of cells in G2. OSU-03012 is an ATP-competitive inhibitor of PAK activity and suppresses the phosphorylation of AKT in thyroid cancer cells.  OSU-03012 inhibits cell growth of hepatocellular carcinoma cell lines including Huh7, Hep3B and HepG2 cells with IC50 values below 1 μM. OSU-03012 does not suppress PDK1 or AKT activity or induce cellular apoptosis but induces autophagy in Huh7 cells. Moreover, accumulation of reactive oxygen species (ROS) is detected after OSU-03012 treatment.  A recent study shows that OSU-03012 could enhance the susceptibility of (Bcr)-Abl mutant cell lines to imatinib-induced apoptosis. 
|In vivo||OSU-03012 suppresses tumor growth by 57.59% and increases cleaved LC3 in Huh7 tumor xenografts at 200 mg/kg.  OSU-03012 remarkably decreases expression of EGFR protein in the tumors by 48% compared with vehicle controls and also prevents YB-1 from binding to the EGFR promoter in MDA-MB-435/LCC6 xenografts.  OSU-03012 is well tolerated and inhibits the growth of HMS-97 schwannoma xenografts by 55% after oral administration. |
PDK-1 Kinase Assay:This in vitro assay is performed using a PDK-1 kinase assay kit. This cell-free assay is based on the ability of recombinant PDK-1, in the presence of DMSO vehicle or OSU-03012, to activate its downstream serum- and glucocorticoid-regulated kinase which, in turn, phosphorylates the Akt/serum- and glucocorticoid-regulated kinase-specific peptide substrate RPRAATF with [γ-32P]ATP. The 32P-phosphorylated peptide substrate is then separated from the residual [γ-32P]-ATP by using P81 phosphocellulose paper and quantitated in a scintillation counter after three washes with 0.75% phosphoric acid.
-  Zhu J, et al. Cancer Res, 2004, 64(12), 4309-4318.
-  Yacoub A, et al. Mol Pharmacol, 2006, 70(2), 589-603.
-  Porchia LM, et al. Mol Pharmacol, 2007, 72(5), 1124-1131.
|In vitro||DMSO||11 mg/mL (23.88 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
0.5% methylcellulose+0.2% Tween 80
For best results, use promptly after mixing.
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