GDC-0623

MEK1 inhibitor, potent and ATP-uncompetitive CAS# 1168091-68-6

GDC-0623

Catalog No. BCC4150----Order now to get a substantial discount!

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Chemical structure

GDC-0623

3D structure

Chemical Properties of GDC-0623

Cas No. 1168091-68-6 SDF Download SDF
PubChem ID 42642654 Appearance Powder
Formula C16H14FIN4O3 M.Wt 456.21
Type of Compound N/A Storage Desiccate at -20°C
Solubility DMSO : ≥ 30 mg/mL (65.76 mM)
*"≥" means soluble, but saturation unknown.
Chemical Name 5-(2-fluoro-4-iodoanilino)-N-(2-hydroxyethoxy)imidazo[1,5-a]pyridine-6-carboxamide
SMILES C1=CC(=C(C=C1I)F)NC2=C(C=CC3=CN=CN32)C(=O)NOCCO
Standard InChIKey RFWVETIZUQEJEF-UHFFFAOYSA-N
Standard InChI InChI=1S/C16H14FIN4O3/c17-13-7-10(18)1-4-14(13)20-15-12(16(24)21-25-6-5-23)3-2-11-8-19-9-22(11)15/h1-4,7-9,20,23H,5-6H2,(H,21,24)
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of GDC-0623

DescriptionGDC-0623 is a potent and ATP-uncompetitive inhibitor of MEK1 with Ki value of 0.13 nM.
TargetsMEK1    
IC500.13 nM (Ki)     

Protocol

Kinase Assay [1]
0.14 μM of purified inactive recombinant MEK-1 protein ispreincubated with inhibitors in 15 μL of kinase buffer including (20 mM MOPS pH7.2, 25 mM beta glycerol phosphate, 5 mM EGTA, 1 mM sodium orthovanadate, 1 mM DTT, 100 μM ATP, 15 mM MgCl2). After incubating 10 minutes at 30°C, 1 ng of BRAF, CRAF or BRAF V600E combined with 0.5 μg of inactive recombinant ERK2 isadded to the reaction in total volume of 20 μL. After incubating 30 minutes at 30°C the reaction isstopped by adding LaemmLe sample buffer. Enzyme activity is measured by determining level of phosphor-MEK by SDS-PAGE. Immunoreactive proteins are visualized with SuperSignal West Pico Chemiluminescent Substrate.

Cell Assay [1]
Flag-MEK1 mutants, S212P and S212A, are generated using the QuickChange site directed mutagenesis kit. Mammalian expression vectors for N-terminal Flag tagged MEK-1 are expressed in HCT116 cells. 1.8×106 HCT116 cells are plated in 10 cm plate and transfected on the following day with 17 μg of expression constructs using lipofectamine 2000. After 48 hours cells are treated with inhibitors for the indicated times, harvested and lysed in 100 μL cell extraction buffer. Cell lysates from each sample are analyzed by SDS-PAGE. Membranes are incubated with phospho-MEK S221, phospho-ERK1/2 and MEK1 primary antibodies and immunoreactive proteins are analyzed by SuperSignal West Pico Chemiluminescent Substrate.

Animal Administration [1]
Colo205 xenografts are established by inoculating 5×106 cells resuspended in Hank's Balanced Salt Solution (HBSS) subcutaneously (s.c.) in the rear right flank of 6-8 week old female nude (nu/nu) mice. NCI-H2122 xenografts are established by inoculating 1×107 cells resuspended in Hank's Balanced Salt Solution (HBSS) plus matrigel (growth factor reduced) s.c. in the rear right flank of 6-8 week old female nu/nu mice. Both A375 and MiaPaca-2 xenografts are initiated by transplanting 1 mm3 tumor fragments from their respective passaged tumors s.c. into the flank of athymic nu/nu mice. When tumors reached appr 200 mm3, mice are randomized and treated with daily (QD) oral gavage (PO) with either vehicle [methylcellulose 0.1% tween 80 0.1% (MCT)], GDC-0973 (at 10 mg/kg), GDC-0623 (40 mg/kg), or G-573 (100 mg/kg). All doses of MEK inhibitors represented maximal tolerated doses (MTDs), resulting in no more than 15-20% body weight loss. Tumor volumes are determined using digital calipers using the formula (L×W×W)/2. Tumor growth inhibition (%TGI) iscalculated as the percentage of the area under the fitted curve (AUC) for the respective dose group per day in relation to the vehicle. Animal weights are recorded twice per week and mice are removed from study if body weights dropped ≥20%. Partial responses (PRs) are defined as any tumor demonstrating a ≥ 50% decrease in tumor volume, whereas complete responses (CRs) are defined as any tumor demonstrating 100% reduction in tumor volume at any point during the study.

References:
[1]. Hatzivassiliou G, et al. Mechanism of MEK inhibition determines efficacy in mutant KRAS- versus BRAF-driven cancers. Nature. 2013 Sep 12;501(7466):232-6. [2]. Takahashi RH, et al. Elucidating the Mechanisms of Formation for Two Unusual Cytochrome P450-Mediated Fused Ring Metabolites of GDC-0623, a MAPK/ERK Kinase Inhibitor. Drug Metab Dispos. 2015 Dec;43(12):1929-1933.

GDC-0623 Dilution Calculator

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GDC-0623 Molarity Calculator

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Preparing Stock Solutions of GDC-0623

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.192 mL 10.9599 mL 21.9197 mL 43.8395 mL 54.7993 mL
5 mM 0.4384 mL 2.192 mL 4.3839 mL 8.7679 mL 10.9599 mL
10 mM 0.2192 mL 1.096 mL 2.192 mL 4.3839 mL 5.4799 mL
50 mM 0.0438 mL 0.2192 mL 0.4384 mL 0.8768 mL 1.096 mL
100 mM 0.0219 mL 0.1096 mL 0.2192 mL 0.4384 mL 0.548 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on GDC-0623

GDC-0623 is a potent and ATP-uncompetitive inhibitor of MEK1 with Ki value of 0.13nM [1].

GDC-0623 is an allosteric MEK inhibitor and has efficacy against both mutant BRAF and mutant KRAS. In the cell viability assays, GDC-0623 inhibits BRAF (V600E) and KRAS (G13D) with EC50 values of 7nM and 42nM, respectively in A375 cells and HCT116 cells. Besides that, GDC-0623 shows similar efficacy in the two genotypes in a panel of BRAF and KRAS-mutant cancer cell lines. GDC-0623 is found to prevent MEK phosphorylation in cells, resulting in more effective inhibition of pERK. Furthermore, it is found that GDC-0623 blocks RAF activation through the effect on MEK. It induces dimerization of MEK with both BRAF and CRAF and stabilizes the RAF–MEK complex. In addition, GDC-0623 also suppresses RAF activation via inhibiting the formation of BRAF–CRAF heterodimer and the translocation of RAF in plasma membrane [1].

References:
[1] Hatzivassiliou G, Haling J R, Chen H, et al. Mechanism of MEK inhibition determines efficacy in mutant KRAS-versus BRAF-driven cancers. Nature, 2013, 501(7466): 232-236.

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References on GDC-0623

Elucidating the Mechanisms of Formation for Two Unusual Cytochrome P450-Mediated Fused Ring Metabolites of GDC-0623, a MAPK/ERK Kinase Inhibitor.[Pubmed:26438627]

Drug Metab Dispos. 2015 Dec;43(12):1929-33.

Two isomeric metabolites of GDC-0623 [5-((2-fluoro-4-iodophenyl)amino)-N-(2-hydroxyethoxy)imidazo[1,5-a]pyridine-6-car boxamide], a mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) kinase inhibitor, were identified in radiolabeled mass balance studies in rats and dogs (approximately 5% in excreta) and were also observed in human circulation (nonradiolabeled). Mass spectrometric data indicated that both metabolites had formed a new ring structure fused to the imidazopyridine core. Given their unusual structures, we conducted experiments to elucidate their chemical structures and understand the mechanisms for their formation. For the first metabolite, M14, a pyrazol-3-ol ring was generated by N-N bond formation between the aniline and hydroxamate. For the second metabolite, M13, an imidazol-2-one was generated by a Hofmann-type rearrangement that involved C-C bond cleavage and C-N bond formation. Both reactions were catalyzed by CYP2C9 and CYP2C19. M14 was generated directly from GDC-0623 and we speculate that its formation was via oxidative activation of the hydroxamic ester by cytochrome P450 (P450) and intramolecular nucleophilic displacement of the ester side chain. M13 (the rearranged metabolite) formed from the N-reduced hydroxamate (amide) and not from GDC-0623 directly. We propose for M13 that a P450-mediated reaction formed a cationic amide intermediate, which enabled the molecular rearrangement of the imidazopyridine core migrating from the amide carbon to the nitrogen and subsequent cyclization reaction. Each of these metabolic pathways constitutes a novel biotransformation mediated by P450 enzymes.

Description

GDC-0623 (RG 7421) is a potent, ATP-uncompetitive inhibitor of MEK1 (Ki=0.13 nM, +ATP), and displays 6-fold weaker potency against HCT116 (KRAS (G13D), EC50=42 nM) versus A375 (BRAFV600E, EC50=7 nM).

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