GNF-2 is a highly selective non-ATP competitive inhibitor of Bcr-Abl.

BCR-ABL (SUP-B15 cells):268 nM, BCR-ABL (K562 cells):273 nM

Binding assay: Recombinant proteins (100 nM for each construct) or immunoprecipitated proteins are diluted in kinase buffer (20 mM HEPES (pH 7.4), 50 mM KCl, 0.1% CHAPS, 30 mM MgCl2, 2 mM MnCl2, 1 mM DTT, and 1% glycerol). Aliquots of the diluted proteins are preincubated with either DMSO or compounds for 30 min at room temperature and then added to K-LISA PTK EAY reaction plates. The kinase reaction is initiated by adding 0.1 mM ATP and is allowed to proceed for 30 min at room temperature. The phosphorylation of GST-Abltide is monitored by SDS-PAGE and phosphorimaging analysis or autoradiography.

Cells (0.3-0.6 × 106 per mL) are plated in duplicate or triplicate in 96-well plates containing increasing GNF-2 concentrations (5 nM–10 μM). After incubation at 37 ℃ in 5% CO2 for 48 hours, the effect of GNF-2 on cell viability is determined by the MTT colorimetric dye reduction method. Inhibition of cell proliferation is calculated as a percentage of growth of DMSO-treated cells, and IC50 values are determined with Microsoft Excel XLfit3.(Only for Reference)