CHIR-124 是一种有效的，选择性的 Chk1 抑制剂，IC₅₀ 值为 0.3 nM；同时可有效抑制 PDGFR 和 FLT3，IC₅₀ 值分别为 6.6 nM 和 5.8 nM。

CHIR-124 is a potent and selective Chk1 inhibitor with IC 50 of 0.3 nM, and also potently targets PDGFR and FLT3 with IC 50 s of 6.6 nM and 5.8 nM.

Solid

Chk1 0.3 nM (IC50) Chk2 697.4 nM (IC5

CHIR-124 is 500- to 5,000-fold less active against other cell cycle kinases, such as cyclin-dependent kinase 2/cyclin A (0.19 μM), cdc2/cyclin B (0.51 μM), and cyclin-dependent kinase 4/cyclin D (2.1 μM). CHIR-124 (≥0.9 nM) in combination with SN-38 (≥0.42 nM) causes significant synergy or >10% deviation from additivity in human cancer cell lines expressing mutant p53, and these values overlap and fall below the IC50s for SN-38 (1.2×10 M) and CHIR-124 (2.2×10 M), respectively. Moreover, CHIR-124 (100 nM) abrogates the SN-38-induced S and G2-M phase cell cycle checkpoints. CHIR-124 (200 nM) leads to a 2.5-fold elevated level of cdc25A above that of the untreated HCT116 p53 cells. The down-regulation of cdc25A induced by SN-38 is completely restored by concurrent or sequential treatment with CHIR-124, proving that CHIR-124 inhibits the Chk1-mediated destruction of

CHIR-124 (10 or 20 mg/kg, p.o.) does not have a significant effect on tumor growth when compared with the vehicle-treated group, but it potentiates the growth inhibitory effect of CPT-11 in a human breast carcinoma xenograft model. The potentiation of the tumor growth inhibitory effect of CPT-11 by CHIR-124 is associated with an increase in apoptosis induction in the tumors. CHIR-124 reverses the suppression of phospho-H3 staining induced by CPT-11, indicating abrogation of the G2-M checkpoint by CHIR-124. has not independently confirmed the accuracy of these methods. They are for reference only.

Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years；4°C 2 years

[1]. Tse AN, et al. CHIR-124, a novel potent inhibitor of Chk1, potentiates the cytotoxicity of topoisomerase I poisons in vitro and in vivo. Clin Cancer Res, 2007, 13(2 Pt 1), 591-602.
[2]. Dai Y, et al. New insights into checkpoint kinase 1 in the DNA damage response signaling network. Clin Cancer Res, 2010, 16(2), 376-383.

In Vitro: DMSO : 7.14 mg/mL (17.00 mM; Need ultrasonic)配制储备液