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ASP5878 is a novel selective FGFR inhibitor with IC50 values of 0.47 nM, 0.6 nM, 0.74 nM and 3.5 nM for FGFR 1, 2, 3 and 4, respectively. ASP5878 inhibits the cell proliferation of HCC cell lines expressing FGF19. ASP5878 inhibits FGFR4 phosphorylation and its treatment results in the suppression of phosphorylation, mobility shift of FRS2, and suppression of ERK phosphorylation in Hep3B2.1-7 cells.
In vivo, ASP5878 (3 mg/kg; oral administration) induces sustained tumor regression in a subcutaneous xenograft mouse model using Hep3B2.1-7. In HuH-7, an orthotopic xenograft mouse model, ASP5878 induces complete tumor regression and dramatically extended the survival of the mice.
| Cell Experiment | |
|---|---|
| Cell lines | Human HCC cell lines |
| Preparation method | HCC cell lines were cultured according to each manufacturer’s guideline. The cell lines in this study were not authenticated by any tests in our laboratory but were purchased from the providers of authenticated cell lines and stored at early passages in a central cell bank at Astellas Pharma Inc. The experiments were conducted using low-passage cultures of these stocks. The cells were seeded in 96-well plates and incubated overnight. The cells were treated with ASP5878 for 5 days. Cell viability was measured using CellTiter-GloTM (Promega, Madison, WI). |
| Concentrations | 0-1000 nM |
| Incubation time | 5 days |
| Animal Experiment | |
|---|---|
| Animal models | HCC orthotopic xenograft model |
| Formulation | Cremophor EL/ethanol or 0.5% MC |
| Dosages | 3 mg/kg |
| Administration | oral |
| 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.
| Molecular Weight | 407.37 |
| Formula | C18H19F2N5O4 |
| CAS Number | 1453208-66-6 |
| Purity | >99% |
| Solubility | DMSO ≥ 80 mg/mL |
| Storage | at -20°C |
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