Cobimetinib racemate

Alias: XL518 racemate, GDC-0973, RG7420 racemate;XL518; RG-7420; XL 518;GDC-0973; XL-518 racemate; GDC0973 racemate; GDC 0973; RG 7420racemate
Cat No.:V4523 Purity: ≥98%
Cobimetinib racemate is the racemic mixture of Cobimetinib (GDC-0973, RG7420; XL-518; Cotellic), which is a novel, orally bioavailable, highly potent and selective small-molecule MEK1 inhibitor with antitumor activity.
Cobimetinib racemate Chemical Structure CAS No.: 934662-91-6
Product category: MEK
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
10mg
25mg
50mg
100mg
250mg
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Other Forms of Cobimetinib racemate:

  • Cobimetinib (GDC-0973, RG-7420, XL-518)
  • Cobimetinib hemifumarate
  • Cobimetinib R-enantiomer
Official Supplier of:
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Cobimetinib racemate is the racemic mixture of Cobimetinib (GDC-0973, RG7420; XL-518; Cotellic), which is a novel, orally bioavailable, highly potent and selective small-molecule MEK1 inhibitor with antitumor activity. With an IC50 of 4.2 nM, it inhibits MEK1. In order to treat melanoma, cobimetinib was approved in 2015 as an anti-cancer drug to be used alone, in combination with vemurafenib, or in combination with both vemurafenib and atezolizumab. Extracellular signal-related kinase 2 (ERK2) phosphorylation and activation are inhibited, and tumor cell proliferation is decreased as a result of GDC-0973's specific binding to and inhibition of the catalytic activity of MEK1.

Biological Activity I Assay Protocols (From Reference)
ln Vitro
Cobimetinib shows strong activity on cell growth inhibtion in a broad panel of tumor types, particularly in BRAF or KRAS mutant cancer cell lines. GDC-0973 causes 888MEL and A2058 cells to undergo more apoptosis, pathway inhibition, and reduced viability when combined with GDC-0941. All BRAFV600E lines have increased levels of GLUT-1 on the cellular membrane following coadministration of GDC-0973 and vemurafenib.
ln Vivo
Cobimetinib (10 mg/kg, p.o.) and GDC-0973 and GDC-0941 together exhibit improved antitumor efficacy in mice with BRAFV600E and KRAS mutant tumors. Combining GDC-0973 and GDC-0941 results in lower levels of hexokinase II, c-RAF, Ksr, and p-MEK protein in mice with drug-resistant A375 xenografts.
Enzyme Assay
Cobimetinib (GDC-0973, RG7420) is a potent, selective and oral MEK1 inhibitor with an IC50 of 4.2 nM for MEK1.
Cell Assay
For 888MEL and A2058 cells, cobimetinib (GDC-0973) has EC50 values of 0.2 M and 10 M, respectively. Treatment of melanoma cells with EC50 concentrations of MEK and PI3K inhibitors (888MEL: 0.05 μM GDC-0973, 2.5 μM GDC-0941; A2058: 2.5 μM GDC-0973, 2.5 μM GDC-0941) lasts for 24 hours. In melanoma with constitutive MAPK activation in A375 cells, mitochondrial OXPHOS regulates the amount of cell death brought on by cobimetinib (100 nM).
Animal Protocol
1, 3, or 10 mg/kg
5 million WM-266-4 melanoma cells are resuspended in Hank balanced salt solution and implanted intradermally into the hind flank of female NCR nude mice. On days 11 or 13 after the implantation, xenograft mice with tumor volumes of approximately 100 to 120 mm3 are randomLy assigned to 8 groups (n=27 per group), 4 single dose groups and 4 multiple dose groups. One day after randomization and group assignment, mice in the single dose groups are given a single oral dose of vehicle (water for injection USP), 1, 3, or 10 mg/kg of Cobimetinib (GDC-0973, expressed as free base equivalents). Mice in the multiple dose groups are given daily oral doses of vehicle (water for injection USP), 1, 3, or 10 mg/kg of GDC-0973 for 14 days. Plasma and tumor samples (n=3 per time point) are collected from euthanized mice predose and at 2, 4, 8, 16, 24, 72, 120, and 168 hours postdose on day 1 (single dose groups) or day 14 (multiple dose groups). Samples are stored at 80°C until analysis. GDC-0973 concentrations in plasma and tumor lysates are determined using liquid chromatography/tandem mass spectrometry (LC/MS-MS). The dynamic range of the assay is 0.004 to 35 μM.
References

[1]. Intermittent administration of MEK inhibitor GDC-0973 plus PI3K inhibitor GDC-0941 triggers robust apoptosis and tumor growth inhibition. Cancer Res. 2012 Jan 1;72(1):210-9.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C21H21F3IN3O2
Molecular Weight
531.31
CAS #
934662-91-6
Related CAS #
Cobimetinib;934660-93-2;Cobimetinib hemifumarate;1369665-02-0;Cobimetinib (R-enantiomer);934660-94-3;Cobimetinib-13C6 racemate
Appearance
Solid
SMILES
C1CCNC(C1)C2(CN(C2)C(=O)C3=C(C(=C(C=C3)F)F)NC4=C(C=C(C=C4)I)F)O
InChi Key
BSMCAPRUBJMWDF-UHFFFAOYSA-N
InChi Code
InChI=1S/C21H21F3IN3O2/c22-14-6-5-13(19(18(14)24)27-16-7-4-12(25)9-15(16)23)20(29)28-10-21(30,11-28)17-3-1-2-8-26-17/h4-7,9,17,26-27,30H,1-3,8,10-11H2
Chemical Name
[3,4-difluoro-2-(2-fluoro-4-iodoanilino)phenyl]-(3-hydroxy-3-piperidin-2-ylazetidin-1-yl)methanone
Synonyms
XL518 racemate, GDC-0973, RG7420 racemate;XL518; RG-7420; XL 518;GDC-0973; XL-518 racemate; GDC0973 racemate; GDC 0973; RG 7420racemate
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: ~100 mg/mL (~188.2 mM)
Water: <1 mg/mL
Ethanol: ~47 mg/mL (~88.46 mM)
Solubility (In Vivo)
5% DMSO+30% PEG 300+5% Tween 80+ddH2O: 5mg/mL
 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.8821 mL 9.4107 mL 18.8214 mL
5 mM 0.3764 mL 1.8821 mL 3.7643 mL
10 mM 0.1882 mL 0.9411 mL 1.8821 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
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Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
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Biological Data
  • Cobimetinib racemate
    FDG-PET imaging. FDG-PET imaging is effective for monitoring vemurafenib and GDC-0973 combination drug action in BRAFV600E mutant and resistant xenografts. EJNMMI Res. 2012; 2: 22.
  • Cobimetinib racemate


    GDC-0973 is a selective, potent MEK inhibitor with efficacy in BRAF and RAS mutant cell lines. A, chemical structure of GDC-0973. B, GDC-0973 was tested in a panel of cell lines in 96-hour viability assays.2012 Jan 1;72(1):210-9.

  • Cobimetinib racemate


    GDC-0973 single-agent efficacy and pharmacodynamic (PD) studies in BRAFV600Eand KRAS mutant tumor models. Dose-ranging efficacy studies were carried out in the (A) A375.X1 and (B) NCI-H2122 tumor xenograft models.2012 Jan 1;72(1):210-9.

  • Cobimetinib racemate


    Combination of GDC-0973 + GDC-0941 results in reduced viability, pathway inhibition, and increased apoptosis. A, the 888MEL and A2058 BRAF mutant melanoma cell lines were treated with increasing concentrations of GDC-0973 and GDC-0941 as single agents and in combination and assayed in a 96-hour viability assay.2012 Jan 1;72(1):210-9.

  • Cobimetinib racemate


    GDC-0973 and GDC-0941 combination results in TGI when dosed daily.2012 Jan 1;72(1):210-9.

  • Cobimetinib racemate


    GDC-0973 and GDC-0941 combination results in TGI when dosed intermittently.

    Cobimetinib racemate

    Transient treatment of GDC-0973 + GDC-0941 results in apoptosis and prolonged accumulation of Bim.

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