Research Area
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Description
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Canccer |
Biological Activity
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Description
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ZM-447439 is a selective and ATP-competitive inhibitor for Aurora A and Aurora B with IC50 of 110 nM and 130 nM, respectively. |
Targets
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Aurora A |
Aurora B |
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IC50 |
110 nM |
130 nM [1] |
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In Vitro
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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 μM. [1] Aurora kinase inhibitor, ZM-447439 time- and dose-dependently inhibits the growth of all three cell lines with IC50 values of 3 μM (BON), 0.9 μM (QGP-1) and 3 μM (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 Vivo
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Clinical Trials
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Features
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ZM-447439 is an Aurora selective ATP-competitive inhibitor. |
Protocol
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Kinase Assay
[1]
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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 μM peptide substrate, 10 μM for Aurora A or 5 μM ATP for Aurora B, and 0.2 μCi γ-[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. |
Cell Assay
[2]
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Cell Lines |
BON, QGP-1 and MIP-101 cells |
Concentrations |
0-5 μM |
Incubation Time |
72 hours |
Methods |
Cell number is evaluated by crystal violet staining. In brief, cells in 96-well plates are fixed with 1% glutaraldehyde. Then cells are stained with 0.1% crystal violet. The unbound dye is removed by washing with water. Bound crystal violet is solubilized with 0.2% Triton X-100. Light extinction which increases linearly with the cell number is analyzed at 570 nm using an ELISA reader. |
References |
[1] Ditchfield C, et al. J Cell Biol. 2003, 161(2), 267-280.
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[2] Georgieva I, et al. Neuroendocrinology. 2010, 91(2), 121-130.
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[3] Teperek-Tkacz M, et al. Cell Cycle. 2010, 9(23), 4674-4687.
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[4] Zhang L, et al. J Obstet Gynaecol Res. 2011, 37(6), 591-600.
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