NSC 109555 is an ATP-competitive inhibitor of checkpoint kinase 2 (Chk2, IC50=200 nM in a cell-free kinase assay). It is selective for Chk2 over Chk1 and 16 kinases in a panel but does inhibit Brk, c-Met, IGFR, and LCK with IC50 values of 210, 6,000, 7,400, and 7,100 nM, respectively. NSC 109555 inhibits Chk2 autophosphorylation and phosphorylation of the Chk2 substrate histone H1 in vitro (IC50=240 nM). It inhibits the growth of, and induces autophagy in, L1210 leukemia cells in vitro.2 NSC 109555 (1,250 nM) potentiates gemcitabine-induced cytotoxicity in MIA PaCa-2, CFPAC-1, PANC-1, and BxPC-3 pancreatic cancer cells, as well as reduces gemcitabine-induced increases in Chk2 phosphorylation and enhances gemcitabine-induced production of reactive oxygen species (ROS) in MIA PaCa-2 cells.
Molecular Weight:
600.67
CAS Number:
[15427-93-7]
Formula:
C21H32N10O7S2
Target:
Autophagy,Checkpoint Kinase (Chk)
Application Notes:
MCE Product type: Reference compound
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