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Formula | C20H20N4O |
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Molecular Weight | 332.4 | CAS No. | 1000669-72-6 | |
Solubility (25°C)* | In vitro | DMSO | 67 mg/mL (201.56 mM) | |
Ethanol | 67 mg/mL (201.56 mM) | |||
Water | Insoluble | |||
* <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. * Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.) |
Description | KW-2449 is a multiple-targeted inhibitor, mostly for Flt3 with IC50 of 6.6 nM, modestly potent to FGFR1, Bcr-Abl and Aurora A; little effect on PDGFRβ, IGF-1R, EGFR. Phase 1. | |||||||||||
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In vitro | KW-2449, a multikinase inhibitor of FLT3, ABL, ABL-T315I, and Aurora kinase, is under investigation to treat leukemia patients. KW-2449 shows the potent growth inhibitory effects on leukemia cells with FLT3 mutations by inhibition of the FLT3 kinase, resulting in the down-regulation of phosphorylated-FLT3/STAT5, G1 arrest, and apoptosis. Oral administration of KW-2449 shows dose-dependent and significant tumor growth inhibition in FLT3-mutated xenograft model with minimum bone marrow suppression. In FLT3 wild-type human leukemia, KW-2449 induces the reduction of phosphorylated histone H3, G2/M arrest, and apoptosis. In Imatinib-resistant leukemia, KW-2449 contributes to release of the resistance by the simultaneous down-regulation of BCR/ABL and Aurora kinases. The inhibitory activity of KW-2449 is not affected by the presence of human plasma protein, such as α1-acid glycoprotein. KW-2449 has potent growth inhibitory activity against various types of leukemia by several mechanisms of action. KW-2449 has significant activity and warrants clinical study in leukemia patients with FLT3 mutations as well as Imatinib-resistant mutations. Phosphorylation levels of FLT3 and STAT5 are decreased by KW-2449 in a dose-dependent manner. In addition, it potently inhibits ABL-T315I, which is associated with IM resistance, with IC50 of 4 nM. On the other hand, KW-2449 has little effect on PDGFRβ, IGF-1R, EGFR, and various serine/threonine kinases even at a concentration of 1 μM. KW-2449 has the potent growth inhibitory activities against not only FLT3/ITD-expressing leukemia cells but also FLT3/KDM-activated and wild-type FLT3-overexpressing leukemia cells. In accordance with growth inhibitory effect, KW-2449 suppresses the phosphorylations of FLT3 (P-FLT3) and its downstream molecule phospho-STAT5 (P-STAT5) in MOLM-13 cells in a dose-dependent manner. Furthermore, KW-2449 increases the percentage of cells in the G1 phase of the cell cycle and reciprocally reduces the percentage of cells in the S phase, resulting in the increase of apoptotic cell population. KW-2449 can dephosphorylate constitutively active WT-FLT3 kinase but not inhibit the proliferation of leukemia cells if they are not mainly addicted to FLT3 the kinase. [1] KW-2449 is rapidly absorbed and converted to a major metabolite M1.Preclinical studies reveal that KW-2449 is converted by monoamine oxidase-B (MAO-B) and aldehyde oxidase into its major metabolite M1.KW-2449 mediates cytotoxicity thru inhibition of FLT3/ITD.KW-2449 is a direct inhibitor of FLT3 and induces inhibition of its downstream target STAT5. [2] KW2449 interacts synergistically with HDACIs to induce apoptosis in Ph+ CML cells in a time- and concentration-dependent manner. KW2449 synergistically enhances the lethality of vorinostat/SNDX275 in CML cells.KW-2449 regimens are active against additional IM-resistant Bcr/Abl+ leukemia cells. KW2449 moderately reduces phosphorylation of histone H3, an indicator of Aurora B activity, in nocodozole-treated K562 cells. [3] | |||||||||||
In vivo | In the MOLM-13 tumor xenograft model, oral administration of KW-2449 for 14 days shows a potent and significant antitumor effect in a dose-dependent manner. [1] | |||||||||||
Features | Investigated as a FLT3 inhibitor in clinical trials, with others in early development. |
Kinase Assay:[2] |
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Cell Assay: [1] |
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Animal Study:[3] |
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, , Dr. Zhang of Tianjin Medical University
Integrative analysis of drug response and clinical outcome in acute myeloid leukemia [ Cancer Cell, 2022, S1535-6108(22)00312-9] | PubMed: 35868306 |
A community challenge for a pancancer drug mechanism of action inference from perturbational profile data [ Cell Rep Med, 2022, 3(1):100492] | PubMed: 35106508 |
Phosphorylation of SHP2 at Tyr62 Enables Acquired Resistance to SHP2 Allosteric Inhibitors in FLT3-ITD-Driven AML [ Cancer Res, 2022, 82(11):2141-2155] | PubMed: 35311954 |
Phosphorylation of SHP2 at Tyr62 Enables Acquired Resistance to SHP2 Allosteric Inhibitors in FLT3-ITD-Driven AML [ Cancer Res, 2022, 82(11):2141-2155] | PubMed: 35311954 |
KW-2449 and VPA exert therapeutic effects on human neurons and cerebral organoids derived from MECP2-null hESCs [ Stem Cell Res Ther, 2022, 13(1):534] | PubMed: 36575558 |
Evaluation of CML TKI Induced Cardiovascular Toxicity and Development of Potential Rescue Strategies in a Zebrafish Model [ Front Pharmacol, 2021, 12:740529] | PubMed: 34733159 |
The Global Phosphorylation Landscape of SARS-CoV-2 Infection [ Cell, 2020, 182(3):685-712.e19] | PubMed: 32645325 |
The Global Phosphorylation Landscape of SARS-CoV-2 Infection [ Cell, 2020, 182(3):685-712.e19] | PubMed: 32645325 |
Synergistic Anti Leukemia Effect of a Novel Hsp90 and a Pan Cyclin Dependent Kinase Inhibitors. [ Molecules, 2020, 8;25(9) pii: E2220] | PubMed: 32397330 |
Small-Molecule and CRISPR Screening Converge to Reveal Receptor Tyrosine Kinase Dependencies in Pediatric Rhabdoid Tumors. [ Cell Rep, 2019, 28(9):2331-2344] | PubMed: 31461650 |
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