For research use only.
CAS No. 927880-90-8
RAF265 (CHIR-265) is a potent selective inhibitor of C-Raf/B-Raf/B-Raf V600E with IC50 of 3-60 nM, and exhibits potent inhibition on VEGFR2 phosphorylation with EC50 of 30 nM in cell-free assays. RAF265 (CHIR-265) induces cell cycle arrest and apoptosis. Phase 2.
Selleck's RAF265 (CHIR-265) has been cited by 16 publications
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Immunoblots showing levels of phospho-MEK (p-MEK), total MEK (t-MEK), phospho-ERK1/2 (p-ERK1/2) and total ERK1/2 (t-ERK1/2) in A375 cells transduced with a retrovirus expressing BRAFV600E, BRAFV600E/L505H, BRAFV600E/F516G or BRAFV600E/T529N and treated with increasing doses of RAF265. α-tubulin (TUBA) was monitored as a loading control.
Pigment Cell Melanoma Res 2014 27(1), 124-33. RAF265 (CHIR-265) purchased from Selleck.
Raf265 inhibited the kinase activity of B-Raf but not of Raf-1 in Pkd2cKO cholangiocytes. Cells were treated for 30 min with different concentrations of Raf265. B-Raf and Raf-1 were immunoprecipated as described in the methods section and a kinase assay in vitro was performed using MEK as a substrate. The kinase activity of Raf was assessed by immunoblot analysis and quantified as optical density of pMEK with respect to untreated cells. In WT cholangiocytes (A) Raf265 inhibited both B-Raf and Raf-1 kinase activity. In Pkd2cKO cholangiocytes (B), Raf265 inhibited only B-Raf while a biphasic effect was found in Raf-1 with a significant increase at doses from 0.001 to 1 uM and a significant inhibition at 10 uM. Blots are representative of four different experiments. (*p<0.05 vs controls; **p<0.001 vs controls).
Hepatology 2012 56(6), 2363-74. RAF265 (CHIR-265) purchased from Selleck.
LS513 cells were treated with increasing concentrations of selumetinib or selumetinib combined with different concentration of RAF265 for 48 hr. Lysates were subjected to western blot analyses, and membranes were probed with the indicated antibodies. Vinculin was included as a loading control.
Cell Rep, 2014, 8(5):1475-83. RAF265 (CHIR-265) purchased from Selleck.
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Choose Selective Raf Inhibitors
|Description||RAF265 (CHIR-265) is a potent selective inhibitor of C-Raf/B-Raf/B-Raf V600E with IC50 of 3-60 nM, and exhibits potent inhibition on VEGFR2 phosphorylation with EC50 of 30 nM in cell-free assays. RAF265 (CHIR-265) induces cell cycle arrest and apoptosis. Phase 2.|
RAF265 inhibits C-Raf, wild type B-Raf and mutant (V600E) B-Raf. RAF265 effectively block phosphorylation of Raf's downstream substrates MEK and ERK in cells and also kill melanoma and colorectal cancer cell lines harboring B-Raf mutations independent of PTEN mutation status. Raf kinase inhibition by RAF265 in mutant B-Raf melanoma cell lines causes cell cycle arrest and induces apoptosis, mimicking the effect of Raf RNAi in these cells. RAF265 also potently inhibits the phosphorylation of VEGFR2 and proliferation of VEGF-stimulated hMVEC.  In HT29 and MDAMB231 cells, RAF265 shows inhibitory activity with IC20 of 1 to 3 μM and IC50 of 5 to 10 μM, respectively. While RAF265 leads to a significant decrease in clonogenic survival in all tested cell lines, which means that RAF265 induces a dominant effect on clonogenic survival. Addition of RAF265 to RAD001 in HCT116 cells could lead to moderately decreased AKT, S6 protein, and 4EBP1 phosphorylation.  Raf265 markedly reduces the protein level of Bcl-2 and great inhibitory in CM- and NCI-H727 cells, while having no effect on the TRAIL susceptibility of BON1 and GOT1 cells.  Protein kinase D3 (PRKD3) that when knocked down could enhance cell killing by RAF265 in A2058 melanoma cells, which prevent reactivation of MAPK signaling, induce PARP cleavage, increase caspase activity, interrupt cell-cycle progression, and inhibit colony formation. 
|In vivo||RAF265 shows 71% to 72% TVI% (tumor volume inhibition percentage) in HCT116 xenografts at 12 mg/kg. While the combination of RAF265 and RAD001 shows enhanced antitumor activity with increased T10 (time to achieve a relative tumor volume of 10 times the initial tumor volume) and tumor growth delay. The combination of RAD001 and RAF265 also significantly enhances the activation of caspase-3 in HCT116 and MDAMB231 but not in A549 xenografts.  RAF265 inhibits FDG (2-deoxy-2-[18F]fluoro-d-glucose) accumulation and decreases the tumor volumes in A375M xenografts by orally dosed of 100 mg/kg. |
Assay Protocol:Raf and Mek are combined at 2 × final concentrations in assay buffer (50 mM Tris, pH 7.5, 15 mM MgCl2. 0.1 mM EDTA and 1 mM DTT) and dispensed 15 μL per well in polypropylene assay plates. Background levels are determined in wells containing Mek and DMSO without Raf. To the Raf/Mek containing wells is added 3 μL of 10 × of RAF265 diluted in 100% DMSO. The raf kinase activity reaction is started by the addition of 12 μL per well of 2.5 × 33P-ATP diluted in assay buffer. After 45-60 minutes, the reactions are stopped with the addition of 70 μL of stop reagent (30 mM EDTA). Filtration plates are pre-wetted for 5 min with 70% ethanol, and then rinsed by filtration with wash buffer. Samples (90 μL) from the reaction wells are then transferred to the filtration plates. The filtration plates are washed 6 × with wash buffer using Millipore filtration apparatus. The plates are dried and 100 μL per well of scintillation fluid is added. The CPM is then determined using a Wallac Microbeta 1450 reader.
|In vitro||DMSO||100 mg/mL (192.89 mM)|
|Ethanol||33 mg/mL (63.65 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
30% PEG400+0.5% Tween80+5% propylene glycol
For best results, use promptly after mixing.
* 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.
In vivo Formulation Calculator (Clear solution)
|Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)|
|Dosage||mg/kg||Average weight of animals||g||Dosing volume per animal||ul||Number of animals|
|Step 2: Enter the in vivo formulation ()|
|% DMSO % % Tween 80 % ddH2O|
Working concentration： mg/ml；
Method for preparing DMSO master liquid: ： mg drug pre-dissolved in μL DMSO (Master liquid concentration mg/mL，)
Method for preparing in vivo formulation：Take μL DMSO master liquid, next addμL PEG300， mix and clarify, next addμL Tween 80，mix and clarify, next add μL ddH2O，mix and clarify.
1.Please make sure the liquid is clear before adding the next solvent.
2.Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2
Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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