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SCH 900776 (MK-8776) is a novel and selective Chk1 inhibitor with IC50 of 3 nM. SCH900776 (300 nM) shows potent inhibitory activities against phosphorylation at ser296-Chk1. SCH900776 (1 μM) causes a 30-fold decrease in the IC50 for hydroxyurea in MDA-MB-231 cells. The Kd value of SCH 900776 for the CHK1 kinase domain is 2 nM. SCH 900776 exhibits an approximate EC50 of 60 nM in cells exposure to hydroxyurea. SCH 900776 induces dose-dependent suppression of CHK1 pS296 and concomitant accumulation of phospho-RPA signal in U2OS cells.
In vivo: SCH 900776 induces the γ-H2AX biomarker at 4 mg/kg (i.p.), and enhances tumor pharmacodynamic and regression responses in A2780 xenograft model. SCH 900776 (16 and 32 mg/kg, i.p.) induces incremental improvements in tumor response.
| Molecular Weight | 376.25 |
| Formula | C15H18BrN7 |
| CAS Number | 891494-63-6 |
| Solubility (25°C) | DMSO 3 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Related Checkpoint Products |
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| AZD7762
AZD7762 is a potent ATP-competitive checkpoint kinase inhibitor with an IC50 of 5 and <10 nM for CHK1 and CHK2 respectively. |
| BIBR1532
BIBR1532 is a potent and selective telomerase inhibitor with IC50 of 100 nM. BIBR 1532 inhibits the proliferation of JVM13 leukemia cells with an IC50 of 52 μM, and similar effect also occurs in other leukemia cell lines such as Nalm-1, HL-60, and Jurkat. BIBR1532 is also an inhibitor of TERT, the rate-limiting enzyme in the regulation of telomerase activity. |
| PF-477736
PF-477736 is a selective checkpoint kinase 1 (Chk1) inhibitor with Ki values of 0.49 nM and 47 nM for CHK1 and CHK2 respectively. |
| Rabusertib (LY2603618)
Rabusertib (LY2603618) is an effective and selective Chk1 inhibitor with an IC50 of 7 nM. |
| CHIR-124
CHIR-124 is a novel and potent Chk1 inhibitor with IC50 of 0.3 nM. |
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