Description
KU-0060648 is a dual inhibitor of DNA-PK and PI3Kα, PI3Kβ, PI3Kδ with IC50 of 8.6 nM and 4 nM, 0.5 nM, 0.1 nM respectively, less inhibition of PI3Kγ with IC50 of 0.59 μM.
Storage
2 years -20 centigrade Powder; 2 weeks 4 centigrade in DMSO; 6 months -80 centigrade in DMSO.
Targets
DNA-PK, PI3Kα, PI3Kβ, PI3Kδ
IC50
8.6 nM; 4 nM; 0.5 nM; 0.1 nM
Molecular Formula
C33H34N4O4S
Chemical Name
1-Piperazineacetamide, 4-ethyl-N-[4-[2-(4-morpholinyl)-4-oxo-4H-1-benzopyran-8-yl]-1-dibenzothienyl]-
Solubility
DMSO 0.4 mg/mL; Water <1 mg/mL; Ethanol <1 mg/mL
In vitro
KU-0060648 exhibits differential effects on growth inhibition, but is not profoundly cytotoxic in a panel of human cancer cell lines. It inhibits DNA-PK and PI-3K with greater potency in MCF7 than SW620 cell using cell-based assays. Five-day exposure to 1 mM KU-0060648 inhibits cell proliferation by more than 95% in MCF7 cells but only by 55% in SW620 cells. In clonogenic survival assays, KU-0060648 increases the cytotoxicity of etoposide and doxorubicin across the panel of DNA-PKcs-proficient cells, but not in DNA-PKcs-deficient cells, confirming that enhanced cytotoxicity of the topoisomerase II poisons etoposide and doxorubicin is due to DNA-PK inhibition.
In vivo
KU-0060648 enhances the anti-tumour activity of etoposide in both MCF7 and SW620 xenograft models, and has single-agent activity in the MCF7 xenograft model.
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