biological activity | AZD5438 is an effective CDK1/2/9 inhibitor, and IC50 is 16 nM/6 nM/20 nM in cell-free test. The effect on CDK5/6 is slightly weak, and it also has inhibitory effect on GSK3β. Phase 1. |
target | TargetValue CDK2 (Cell-Free Assay) 6 nM CDK1 (Cell-Free Assay) 16 nM CDK9 (Cell-Free Assay) 20 nM |
Target | Value |
CDK2
(Cell-free assay)
| 6 nM |
CDK1
(Cell-free assay)
| 16 nM |
CDK9
(Cell-free assay)
| 20 nM |
in vitro study | AZD5438 on cyclin-dependent kinases, including cyclin E-cdk2, cyclin A- cdk2, cyclin B1-cdk1, cyclin D3-cdk6, and the activity of cyclin T-cdk9 showed effective inhibition, IC50 was 6 nM,45 nM,16 nM,21 nM, and 20 nM respectively. In addition, AZD5438 also inhibits the kinase activity of p25-cdk5 and glycogen synthesis kinase 3β with IC50 of 14 nM and 17 nM, respectively. AZD5438 induces cell cycle arrest by inhibiting phosphorylation of cdk-dependent substrates and exhibits extensive antiproliferative activity against a range of tumor cell lines, including lung, colorectal, breast, prostate, and hematological tumors, with IC50 ranging from 0.2 μM (MCF-7) to 1.7 μM (ARH-77). |
in vivo studies | in vivo, AZD5438 oral therapy has a statistically significant inhibitory effect on the growth of human tumor xenografts derived from various types of cancer, including breast cancer, colon cancer, lung cancer, prostate cancer and ovarian cancer, with the maximum TGI ranging from 38% to 153%. In the SW620 xenograft model, AZD5438 will produce dose-dependent inhibition on various cyclin, such as phH3, phosphonucleolin, PP1a, and several phosphate-pRb polypeptides. |