KB-0742 dihydrochloride 是一种有效的，选择性的和具有口服活性的 CDK9 抑制剂，对 CDK9/cyclin T1 的 IC₅₀ 为 6 nM。KB-0742 dihydrochloride 对 CDK9/cyclin T1 具有选择性，其选择性是其他 CDK 激酶的 50 倍以上。KB-0742 dihydrochloride 具有有效的抗肿瘤活性。

KB-0742 dihydrochloride is a potent, selective and orally active CDK9 inhibitor with an IC 50 of 6 nM for CDK9/cyclin T1. KB-0742 dihydrochloride is selective for CDK9/cyclin T1 with >50-fold selectivity over other CDK kinases. KB-0742 dihydrochloride has potent anti-tumor activity.

Solid

CDK9/cyclinT1 6 nM (IC50)

KB-0742 (6 hours; 0.1-10 μM; 22Rv1 cells) treatment significant reduction of downstream phosphorylation of RNA Pol II at Ser2 and Ser7, and diminished phosphorylation at Ser5. Global androgen receptor (AR)-FL and AR-V protein levels are significantly reduced starting at 6 h treatment time, which is accompanied by the reduction of phospho-AR levels (Ser81).
KB-0742 (48-72 hours) treatment shows cytostatic effects in prostate cancer and leukemia cell lines. KB-0742 shows antiproliferative activity with GR50s of 0.183 μM and 0.288 μM for 22Rv1 cells and MV-4-11 AML cells, respectively.
In 22Rv1 cells, KB-0742 rapidly downregulates nascent transcription, preferentially depleting short half-life transcripts and AR-driven oncogenic programs. has not independently confirmed the accuracy of these methods. The

KB-0742 (3-30 mg/kg; p.o.; daily; over 21 days) is well tolerated even at high dose, while significantly reducing tumor burden in 22Rv1 human prostate cancer cell line-derived xenograft (CDX) models. has not independently confirmed the accuracy of these methods. They are for reference only. Animal Model:

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moistur In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

[1]. André Richters, et al. Modulating Androgen Receptor-Driven Transcription in Prostate Cancer with Selective CDK9 Inhibitors. Cell Chem Biol. 2020 Oct 20;S2451-9456(20)30380-9.

In Vitro: H₂O : 100 mg/mL (277.52 mM; Need ultrasonic)DMSO : 62.5 mg/mL (173.45 mM; Need ultrasonic)配制储备液