A potent Cdc7 kinase inhibitor
Cdc7 kinase is a key regulator of the S-
1.Montagnoli, A., Valsasina, B., Croci, V., et al.A Cdc7 kinase inhibitor restricts initiation of DNA replication and has antitumor activityNat. Chem. Biol.4(6)357-365(2008) 2.Menichincheri, M., Bargiotti, A., Berthelsen, J., et al.First Cdc7 kinase inhibitors: Pyrrolopyridinones as potent and orally active antitumor agents. 2. lead discoveryJ. Med. Chem.52(2)293-307(2009)
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Kinase experiment: |
20 ng of purified human DDK is pre-incubated with increasing concentrations of each DDK inhibitor for 5 min. Then 10 ?Ci (γ)-32P ATP and 1.5 ?M cold ATP are added in a buffer containing 50 mM Tris-HCl (pH 7.5), 10 mM MgCl2, and 1 mM DTT and incubated for 30 min at 30°C. The proteins are denatured in 1X Laemmli buffer at 100°C followed by SDS-PAGE and autoradiography on HyBlot CL film. Auto-phosphorylation of DDK is used as an indicator of its kinase activity. 32P-labeled bands are quantified using ImageJ and the IC50 values are calculated using GraphPad. |
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Cell experiment: |
For assays in 96 well plates 2500 cells are plated per well. After 24 hours, cells are treated with small molecule inhibitors and incubated for 72 hours at 37°C. Subsequently the cells are lysed and the ATP content is measured as an indicator of metabolically active cells using the CellTiter-Glo assay. IC50 values are calculated using the GraphPad software. For assays in six well plates, 100,000 cells are plated per well. After 24 hours, cells are treated with small molecule inhibitors and incubated for varying time points. Cells are trypsinized and a suspension is made in 5 mL of phosphate buffered saline. 30 ?L of this suspension is mixed with 30 ?L of CellTiter-Glo reagent followed by a 10-minute incubation at room temperature. Luminescence is measured using EnVision 2104 Multilabel Reader and BioTek Synergy Neo Microplate Reader. |
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参考文献: [1]. Sasi NK, et al. The potent Cdc7-Dbf4 (DDK) kinase inhibitor XL413 has limited activity in many cancer cell lines and discovery of potential new DDK inhibitor scaffolds. PLoS One. 2014 Nov 20;9(11):e113300. |
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