LSN3106729 hydrochloride, the metabolite of Abemaciclib , is a CDKinhibitor with antitumor activity. LSN3106729 hydrochloride and a CRBN ligand have been used to design PROTAC CDK4 6 degrader[1].
3-Methylthienyl-carbonyl-JNJ-7706621 is a highly potent and selective inhibitor of cyclin-dependent kinase (CDK). It exhibits impressive IC50 values of 6.4 nM and 2 nM for CDK1 cyclin B and CDK2 cyclin A, respectively. Additionally, 3-Methylthienyl-carbonyl-JNJ-7706621 demonstrates potent inhibition against GSK-3 (IC50 = 0.041 μM) and moderate potency towards CDK4, VEGF-R2, and FGF-R2 (IC50 = 0.11 μM, 0.13 μM, and 0.22 μM, respectively). Its applications in cancer research are noteworthy.
CGP74514A is a CDK1 inhibitor with potential anticancer activity. In U937 cells, CGP74514A - induced apoptosis (5 microM) became apparent within 4 hr and approached 100% by 24 hr. The pan- caspase inhibitor Boc-fmk and the caspase-8 inhibitor lETD-fmk opposed CGP74514A -induced caspase-9 activation and PARP degradation, but not cytochrome c or Smac DIABLO release. CGP74514A -mediated apoptosis was substantially blocked by ectopic expression of full-length Bel- 2, a loop-deleted mutant Bcl-2, and Bcl-x(L). CGP74514A treatment (5 microM; 18 hr) resulted inincreased p21(CIP1) expression, p27(KIP1) degradation, diminished E2F1 expression, and dephosphorylation of p34(CDC2). It also induced early (i.e., within 2 hr) inhibition of CDK1 activity and dephosphorylation of pRb, followed by pRb degradation, but did not block pRb phosphorylation at CDK2- and CDK4- specific sites. These findings indicate that the selective CDK1 inhibitor, CGP74514A , induces complex changes in cell cycle......