THZ1 2HCl (THZ1 Dihydrochloride) is a selective, covalent, and allosteric inhibitor of CDK7 with an IC50 of 3.2 nM. THZ1 2HCl has antiproliferative effects on a variety of cancer cell lines.

CDK7 (cell-based assay):3.2 nM

THZ1 2HCl irreversibly inhibits the phosphorylation of RNA polymerase II CTD. THZ1 2HCl(250 nM) completely inhibits the phosphorylation of CDK7 substrate RNAPII CTD at Ser 5 and Ser 7, and the phosphorylation of Ser 2 is lost in Jurkat cells. Low concentrations of THZ1 2HCl have major effects on a small subset of genes, including RUNX1, thus leading to the subsequent loss of a larger gene expression program, resulting in cell death [1].

THZ1 2HCl inhibits the proliferation of KOPTK1 T-ALL cells in a mouse xenograft model. THZ1 2HCl(10 mg/kg) is well tolerated, and its body weight and behavior did not change significantly. THZ1 2HCl has no obvious toxic effects in animal models [1].

Treat cells with THZ1, THZ1-R or DMSO From 0 to 6 hours, the effect of treatment time on THZ1-mediated inhibition of RNA polymerase II CTD phosphorylation was detected. In subsequent experiments, cells were treated with compounds for 4 hours, then the compound-containing medium was removed, cells were washed, and cells were grown in inhibitor-free medium.