CHIR-124 is a novel and potent chk1 inhibitor with an IC50 of 0.3 nM. CHIR-124 interacts synergistically with camptothecin in causing growth inhibition in MDA-MB-435 cells as determined by isobologram analysis. In HCT116 human colon carcinoma cells, CHIR-124 increased the effect of SN-38, an active metabolite of irinotecan, in a sequence-dependent manner, with the highest induction of mitotic catastrophe and apoptosis seen when CHIR-124 was given sequentially after SN-38 pretreatment. More importantly, the enhancement of cell death by CHIR-124 was markedly increased in isogenic p53-null and p21-null HCT116 cells.
BMC Biol. 2021 May 20;19(1):108.
Very long intergenic non-coding (vlinc) RNAs directly regulate multiple genes in cis and trans
CHIR-124 purchased from AbMole
Molecular Weight | 419.91 |
Formula | C23H22ClN5O |
CAS Number | 405168-58-3 |
Solubility (25°C) | DMSO 7 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.
[1] Xiaoxue Song, et al. Synergistic targeting of CHK1 and mTOR in MYC-driven tumors
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