ZM 447439

513, 59

0-5 uM

In vitro, ZM-447439 selectively inhibits recombinant human Aurora A and B with IC50 values of 110 and 130 nM, respectively, while other protein kinases of diverse structural types including the mitotic kinases CDK1 and PLK1 are inhibited with IC50 values >10 uM. [1] Aurora kinase inhibitor, ZM-447439 time- and dose-dependently inhibits the growth of all three cell lines with IC50 values of 3 uM (BON), 0.9 uM (QGP-1) and 3 uM (MIP-101) after 72 hours of continuous exposure. In addition, ZM-447439 potently induces cell apoptosis by promoting DNA fragmentation and caspase 3 and 7 activation, and arrests GEP-NET cells in the G0 /G1and G2/M phase of the cell cycle. [2] In mouse embryo, inhibition of Aurora kinase activity by ZM-447439 results in abnormalities during mitosis by regulating the phosphorylation of histone H3 serine 10 (H3S10Ph) from G2 to metaphase with different perturbations in each embryonic cycle. [3] A recent study shows that ZM-447439 exhibits growth inhibitory and proapoptotic effect on cervical cancer SiHa cells, and enhances the chemosensitivity to cisplatin. [4]

In vitro kinase assays, Recombinant Aurora A and B are expressed as NH2-terminal His6-tagged fusion proteins using a baculovirus expression system. Aurora A is purified by affinity chromatography using Ni-NTA agarose, and Aurora B is purified by ion exchange chromatography using CM Sepharose Fast Flow. 1 ng purified recombinant enzyme is added to a reaction cocktail containing 25 mM Tris-HCl, pH 7.5, 12.5 mM KCl, 2.5 mM NaF, 0.6 mM DTT, 6.25 mM MnCl2, 10 uM peptide substrate, 10 uM for Aurora A or 5 uM ATP for Aurora B, and 0.2 uCi gamma-[33P]ATP (specific activity >=2, 500 Ci/mmol), and is then incubated at RT for 60 minutes. Reactions are stopped by addition of 20% phosphoric acid, and the products are captured on P30 nitrocellulose filters and assayed for incorporation of 33P with a BetaplateTM counter. No enzyme and no compound control values are used to determine the concentration of ZM447439, which gave 50% inhibition of enzyme activity. Further details are available on request from Nicholas Keen.

DMSO 103 mg/mL, Water <1 mg/mL, Ethanol <1 mg/mL

N-(4-(6-methoxy-7-(3-morpholinopropoxy)quinazolin-4-ylamino)phenyl)benzamide