Dabrafenib (GSK2118436) is a selective, orally bioavailable inhibitor of Mutant B-raf (BRAF) protein kinase with potential antineoplastic activity. B-raf belongs to the the raf/mil family of serine/threonine protein kinases and plays a role in regulating the MAP kinase/ERKs signaling pathway, which may be constitutively activated due to BRAF gene mutations. Mutations in BRAF are associated with increased growth and proliferation of cancer cells. Dabrafenib (GSK2118436) selectively binds to and inhibits the activity of B-raf, which may inhibit the proliferation of tumor cells which contain a mutated BRAF gene. Administration of the mutant BRAFi dabrafenib is associated with induction of keratinocytic proliferation, which in some cases develops features of low-grade malignancy.
Immunobiology. 2023 Jan;228(1):152311.
Characterization of the impact of immune checkpoint inhibitors on platelet activation and aggregation
Dabrafenib Mesylate purchased from AbMole
| Cell Experiment | |
|---|---|
| Cell lines | A375P, SKMEL28 and Colo205 cell lines |
| Preparation method | A375P-F11 assay: A375P cells were plated in 96-well plates by limiting dilution and single cell-derived clones were harvested and tested for sensitivity to B-Raf inhibitors. The F11 clone was selected for future studies and was named A375P-F11. Cellular pSmad Assay to Measure Anti-TGF-β Activity: Activity of compounds was tested in a mechanistic assay in HepG2 cells. Cells were seeded in 12-well plates at a density of 500,000 cells/well and allowed to adhere overnight at 37℃/5% CO2. Media (BME+10% serum) was removed and compound in serum free media was added to the cells for 45 minutes at 37oC/5% CO2. Cells were stimulated with 1 ng/ml TGF-β (R&D systems) for 60 minutes. Cells were lysed in buffer (25 mM Tris-HCl ph: 7.5, 2 mM EDTA, 2 mM EGTA,1% Triton X-100, 0.1 % SDS, 50 mM sodium-β-glycerophosphate, 2 mM sodium orthovanadate, 12.5 mM sodium pyrophosphate, protease and phosphatase inhibitor cocktails) for 30 minutes, scraped, collected, clarified by centrifugation and prepared for western blots in LDS/reducing reagent (Invitogen). Samples were resolved on 4-12% Bis-Tris gels, transferred to PVDF, and probed for total and phospho-Smad2 using antibodies from Cell Signaling. Gels were imaged using the odyssey blot scanner (Licor) and quantified using Licor software. Phospho:total Smad2 ratios were determined and the IC50 was defined as the concentration of compound which decreased the phospho:total ratio by 50%. |
| Concentrations | 0~10 nM |
| Incubation time | |
| Animal Experiment | |
|---|---|
| Animal models | A375P F11 Melanoma Xenograft in nude mice |
| Formulation | 0.5% hydroxypropylmethylcellulose (Sigma) and 0.2% Tween-80 in distilled water pH 8.0 |
| Dosages | 0.2 mL/20g daily |
| Administration | oral gavage |
| Molecular Weight | 615.67 |
| Formula | C23H20F3N5O2S2.CH4O3S |
| CAS Number | 1195768-06-9 |
| Solubility (25°C) | DMSO 36 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related Raf Products |
|---|
| Cyclorasin 9A5
Cyclorasin 9A5 is an 11-residue cell-permeable cyclic peptide that orthosterically inhibits the Ras-Raf protein interaction with an IC50 of 120 nM. |
| R18
R18 is a peptide antagonists of 14-3-3, with a KD of 70-90 nM. |
| PROTAC RAF degrader 1
PROTAC RAF degrader 1 is a PROTAC RAF degrader. |
| B-Raf IN 15
B-Raf IN 15 is a BRAF inhibitor. |
| Raf inhibitor 3
Raf inhibitor 3 is a Raf inhibitor. |
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