Home Protein Tyrosine Kinase c-Met inhibitor SGX-523

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SGX-523 c-Met inhibitor

Cat.No.S1112

SGX-523 is a selective Met (c-Met) inhibitor with IC50 of 4 nM, no activity to BRAFV599E, c-Raf, Abl and p38α. Phase 1.
SGX-523 c-Met inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 359.41

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Chemical Information, Storage & Stability

Molecular Weight 359.41 Formula

C18H13N7S

 Storage (From the date of receipt)
CAS No. 1022150-57-7 Download SDF Storage of Stock Solutions

Synonyms N/A Smiles CN1C=C(C=N1)C2=NN3C(=NN=C3SC4=CC5=C(C=C4)N=CC=C5)C=C2

Solubility

In vitro
Batch:

DMSO : 2 mg/mL (5.56 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass Concentration Volume Molecular Weight

In vivo
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Mechanism of Action

Targets/IC50/Ki
c-Met [1]
(Cell-free assay)
4 nM
In vitro
SGX-523 belongs to the class of c-Met/hepatocyte growth factor receptor (HGFR) tyrosine kinase inhibitors. This compound stabilizes MET in a unique inactive conformation that is inaccessible to other protein kinases, suggesting an explanation for its selectivity. It potently inhibits the purified MET catalytic domain but not the closely related receptor tyrosine kinase RON. This chemical indicates ATP-competitive inhibition with higher apparent affinity for the less active, unphosphorylated form of MET [MET-KD(0P), with a Ki of 2.7 nM] versus the more active phospho-enzyme [MET-KD(3P), with a Ki of 23 nM], a phenomenon consistent with preferential binding to an inactive enzyme conformation. It inhibits MET-mediated signaling, cell proliferation and cell migration at nanomolar concentrations but had no effect on signaling dependent on other protein kinases, including the closely related RON, even at micromolar concentrations.[1]
Kinase Assay
Kinase assays
Initial rate constants are measured at 21 °C in the presence of 100 mM HEPES (pH 7.5), 0.3 mg/mL poly(Glu-Tyr) peptide substrate, 10 mM MgCl2, 1 mg/mL bovine serum albumin, 5% DMSO, 20 nM MET-KD and various concentrations of ATP and SGX523. Total reaction volumes (20 μL) are quenched with 20 μL Kinase-Glo detection buffer. Luminescence is detected in a plate-reading luminometer and the results are analyzed by nonlinear regression.
In vivo
SGX523 significantly retards the growth of preestablished GTL16 tumors when administered orally at doses of ≥10 mg/kg twice daily. This compound potently inhibits U87MG tumor growth; at 30 mg/kg dosed twice daily, it leads to clear regression of U87MG tumors. This chemical, dosed twice daily at 30 mg/kg, also retards the growth of H441 tumors with concomitant reduction in tumor MET autophosphorylation levels. Its inhibition of MET in vivo is associated with the dose-dependent inhibition of growth of tumor xenografts derived from human glioblastoma, lung and gastric cancers, confirming the dependence of these tumors on MET catalytic activity. [1]
References

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