Antibodies
GSK923295
- 貨號 Cat. No.
- S7090
- 規格 Size
- 5~200mg
- 品牌 Brand
- Selleckchem
Description
GSK923295
Catalog No.S7090
GSK923295 is a first-in-class, specific allosteric inhibitor of CENP-E kinesin motor ATPase with Ki of 3.2 nM, and less potent to mutant I182 and T183. Phase 1.
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Biological Activity
| Description | GSK923295 is a first-in-class, specific allosteric inhibitor of CENP-E kinesin motor ATPase with Ki of 3.2 nM, and less potent to mutant I182 and T183. Phase 1. | |||||
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| Targets | CENP-E | |||||
| IC50 | 3.2 nM (Ki)[1] | |||||
| In vitro | GSK923295 is the first potent and selective inhibitor of the mitotic kinesin centromere-associated protein-E (CENP-E). [1][2] GSK923295 is uncompetitive with both ATP and microtubules (MT), inhibiting CENP-E MT-stimulated ATPase activity with a Ki of 3.2 nM, highly selective over other kinesins. GSK923295 inhibits release of inorganic phosphate and stabilizes CENP-E motor domain interaction with microtubules, reduces the rate of ATP-promoted dissociation of CENP-E from MT (koff, MT) by more than 50-fold. GSK923295 causes failure of metaphase chromosome alignment and induces mitotic arrest. GSK923295 is a potent inhibitor of tumor cell growth, with an average GI50 of 253 nM and a median GI50 of 32 nM for 237 tumor cell lines. [1] GSK923295 inhibits tumor cell growth more effectively when mitogen-activated protein kinase (MEK/ERK) signaling is also inhibited. [4] | |||||
| In vivo | GSK923295 produces clear increases in the abundance of mitotic figures and scattered apoptotic bodies in tumors. GSK923295 causes a dose-dependent increase in the ratio of 4n to 2n nuclei. GSK923295 exhibits robust, dose-dependent antitumor activity against Colo205 xenografts, including partial and complete regressions at the 125 mg/kg dose.[1] GSK923295 demonstrates significant antitumor activity against solid tumor models, inducing CRs in Ewing sarcoma, rhabdoid, and rhabdomyosarcoma xenografts, may be a valuable therapeutic target in pediatric cancer. [3] | |||||
| Features | The first potent and selective inhibitor of CENP-E. | |||||
Protocol(Only for Reference)
Kinase Assay: [1]
| Enzymology | Kinesin motor domains are expressed in Escherichia coli BL21(DE3) and purified. CENP-E proteins includes residues 2–340 with a carboxyl-terminal 6-his tag. All studies using MT are conducted in PEM25 buffer [25mM PipesK+ (pH 6.8), 2mM MgCl2, 1mM EGTA] supplemented with 10 μM paclitaxel. The IC50 for steady-state inhibition is determined at 500 μM ATP, 5 μM MT, and 1 nM CENP-E in PEM25 buffer. |
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Cell Assay: [1]
| Cell lines | Tumor cell lines |
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| Concentrations | ~10 μM |
| Incubation Time | 72 h |
| Method | Cell-growth inhibition assays are performed by MDS in 384-well plates, and DNA content of fixed cells stained with DAPI using an Incell 1000 is analyzed. DNA content is determined 24 h after seeding (T0) and after exposure to varying concentrations of drug for an additional 72 h (T72). All T72 measurements are normalized to T0. Curves are analyzed using the XLfit curve-fitting tool to determine the concentration of GSK923295 yielding 50% growth inhibition relative to T0 and Ymax values (GI50). |
Animal Study: [1]
| Animal Models | mice bearing xenografts of the Colo205 colon tumor-cell line |
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| Dosages | 125 mg/kg, two cycles of three daily injections separated by 1 week |
| Administration | i.p. |
References
Chemical Information
| Molecular Weight (MW) | 592.13 |
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| Formula | C32H38ClN5O4 |
| CAS No. | 1088965-37-0 |
| Storage | 3 years -20℃Powder |
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| 6 months-80℃in DMSO | |
| Syonnyms | N/A |
| Solubility (25°C) * | In vitro | DMSO | mg/mL (<1 mM) |
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| Water | mg/mL (<1 mM) | ||
| Ethanol | mg/mL (<1 mM) | ||
| * <1 mg/ml means slightly soluble or insoluble. * Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations. | |||
| Chemical Name | Benzamide, 3-chloro-N-[(1S)-2-[[2-(dimethylamino)acetyl]amino]-1-[[4-[8-[(1S)-1-hydroxyethyl]imidazo[1,2-a]pyridin-2-yl]phenyl]methyl]ethyl]-4-(1-methylethoxy)- |
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