CCT245737 is a potent, selective and orally active checkpoint kinase 1 (CHK1) inhibitor, with IC50 values of 1.3 nM, 2440 nM and 30 nM for CHK1, CHK2 and G2 check point abrogation, respectively. CCT245737 (150 mg/kg, p.o) alone significantly inhibits tumor growth in an Eμ-Myc mouse model of human B-cell lymphocytic leukemia. CCT245737 (150 mg/kg, p.o.) inhibits tumor growth in combination with gemcitabine (100 mg/kg i.v.) in HT29 colon cancer xenografts. CCT245737 (300 mg/kg, p.o.) also inhibits the gemcitabine (60 mg/kg, i.v.) induced pSer296 CHK1 autophosphorylation at 24 h in SW620 human colon cancer xenografts.
| Cell Experiment | |
|---|---|
| Cell lines | HT29, SW620, MiaPaCa-2 and Calu6 cell line |
| Preparation method | Cytotoxicity is determined as the drug concentration that gave 50% inhibition of tumor cell proliferation (GI50) using a 96h (i.e. 4-doublings) Sulforhodamine B (SRB) assay. Inhibition of intracellular CHK1 activity is measured using a cell based ELISA for the abrogation of an etoposide induced G2 checkpoint (mitosis induction assay, MIA). |
| Concentrations | from 30 to 220nM |
| Incubation time | 96 h |
| Animal Experiment | |
|---|---|
| Animal models | BALB/c mice |
| Formulation | vehicle for oral administration of CCT245737 was DPTW (10% DMSO, 20% PEG400, 5% Tween 80 and 65% water) |
| Dosages | 10mg/kg (i.v.); 150mg/kg (p.o.) |
| Administration | i.v. or p.o. administration |
| Molecular Weight | 379.34 |
| Formula | C16H16F3N7O |
| CAS Number | 1489389-18-5 |
| Solubility (25°C) | DMSO ≥ 45 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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CBP501 Affinity Peptide is a Chk kinase inhibitor that can abrogate G2 arrest induced by DNA-damaging agents. |
| Chktide
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| Zn-DPA-maytansinoid conjugate 1
Zn-DPA-maytansinoid conjugate 1 is a small molecule-based maytansinoid conjugate targeting immune checkpoint. |
| CHK1-IN-7
CHK1-IN-7 is a potent human CHK1 inhibitor. |
| Chk2-IN-1
Chk2-IN-1 (compound 1) is a potent and selective inhibitor of checkpoint kinase 2 (Chk2), with IC50s of 13.5 nM and 220.4 nM for Chk2 and Chk1, respectively. Chk2-IN-1 can elicit a strong ataxia telangiectasia mutated (ATM)-dependent Chk2-mediated radioprotection effect. |
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