BM-1244 is a potent Bcl-xL Bcl-2 inhibitor with Kis of 134 and 450 nM for Bcl- xL and Bcl-2, respectively. BM-1244 inhibits senescent fibroblasts (SnCs) with an EC50 of 5 nM[1].
Pteropodine acts as a positive modulator of muscarinic M(1) and 5-HT(2) receptors. Pteropodine shows antigenotoxic, antioxidant and lymphocyte induction effects, it also shows strong apoptotic effect on acute leukaemic lymphoblasts.
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 in increased 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......