R428 blocks the catalytic and procancerous activities of Axl. R428 inhibits Axl with low nanomolar activity and blocked Axl-dependent events, including Akt phosphorylation, breast cancer cell invasion, and proinflammatory cytokine production. R428 inhibited angiogenesis in corneal micropocket and tumor models. In vitro, R428 caused a concentration-dependent inhibition of preadipocyte differentiation into mature adipocytes, as evidenced by reduced lipid uptake. In vivo, oral administration of R428 for 5 weeks to mice kept on a high-fat diet resulted in significantly reduced weight gain and subcutaneous and gonadal fat mass. Additionally, R428 synergized with cisplatin to enhance suppression of liver micrometastasis.
Cancer Biol Ther. 2015 Oct;1535-47.
The small GTPase ADP-Ribosylation Factor 1 mediates the sensitivity of triple negative breast cancer cells to EGFR tyrosine kinase inhibitors.
Bemcentinib purchased from AbMole
Cell Experiment | |
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Cell lines | MDA-MB-231 or 4T1 cells |
Preparation method | Invasion Assays: MDA-MB-231 or 4T1 cells (1 × 105) were allowed to migrate through Matrigel (Millipore) toward 20% FCS in an 8-μm pore 24-well Transwell plate (BD Bio‐sciences) at 37°C for 16 to 24 h. Noninvaded cells and Matrigel were removed by swabbing. Invaded cells were fixed in 4% formaldehyde, stained with 1% crystal violet, and quantified as for Axl cellbased assay. Cells were preincubated with R428 for 3 h. R428 was added to both upper and lower Transwell chambers. |
Concentrations | 0, 0.03, 0.3, 3 µ M |
Incubation time | 3 h |
Animal Experiment | |
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Animal models | Female BALB/c mice 4T1 Orthotopic Model |
Formulation | R428 was formulated for in vivo studies in 0.5% hydroxypropylmethylcellulose + 0.1% Tween 80. |
Dosages | 7–75 mg/kg twice daily |
Administration | oral gavage |
Molecular Weight | 506.64 |
Formula | C30H34N8 |
CAS Number | 1037624-75-1 |
Solubility (25°C) | DMSO 60 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.
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