PHA-665752 is a small-molecule inhibitor of c-Met, inhibits tumorigenicity and angiogenesis in mouse lung cancer xenografts. c-Met is a tyrosine kinase receptor for hepatocyte growth factor/scatter factor (HGF/SF). PHA665752 inhibited specific phosphorylation of TPR-MET as well as phosphorylation of downstream targets of the mammalian target of rapamycin pathway. Short-term treatment with PHA-665752 decreased the numbers of premalignant lung lesions and induced apoptosis in tumor cells and vascular endothelial cells within lesions. In cell culture, PHA-665752 induced apoptosis of a lung adenocarcinoma cell line derived from Kras(LA1) mice (LKR-13) and a murine lung endothelial cell line (MEC). PHA665752 was shown to inhibit cMet/HGF/SF signaling in vitro, suggesting c-Met inhibitors may have efficacy for blocking local progression and/or metastatic spread of c-Met-positive NBL in vivo.
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Source | Biochem Biophys Res Commun (2014). Figure 2.PHA-665752 |
| Method | MTT assay | |
| Cell Lines | CNE-1 and HONE-1 cells | |
| Concentrations | 2 μM | |
| Incubation Time | 72 h | |
| Results | Further experiments showed that PHA-665752 inhibited cell proliferation in a dose-dependent manner in the CNE-1 and HONE-1 cells |
| Cell Experiment | |
|---|---|
| Cell lines | S114, GTL-16, NCI-H441, or BxPC-3 cells |
| Preparation method | Cell Proliferation Assays. S114, GTL-16, NCI-H441, or BxPC-3 cells were seeded in 96-well plates at 9000 cells/well in medium with 10% FBS. After incubation for 48 h in low serum (0.5% FBS, S114; 0.1% FBS, GTL-16, NCI-H441, and BxPC-3), cells were treated with different concentrations of PHA-665752 for 18 h at 37°C. HGF (50 ng/ml) was added for 18 h before BrdUrd for studies involving GTL-16, H441, and BxPC-3. After incubation with BrdUrd labeling reagent for 1 h (Sigma Biochemicals, St. Louis, MO), cells were fixed and BrdUrd incorporation into newly synthesized DNA was assessed using anti-BrdUrd peroxidase-conjugated antibody followed by colorimetric determination at 630 nm. |
| Concentrations | 0~1.25µM |
| Incubation time | 18h |
| Animal Experiment | |
|---|---|
| Animal models | athymic mice bearing S114 or GTL-16 tumor xenografts |
| Formulation | L-lactate (pH 4.8) and 10% polyethylene glycol |
| Dosages | 7.5, 15, 30 mg/kg/day |
| Administration | i.v. bolus via tail vein injection |
| Molecular Weight | 641.61 |
| Formula | C32H34Cl2N4O4S |
| CAS Number | 477575-56-7 |
| 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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