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GNF-2 is a highly selective non-ATP competitive inhibitor of Bcr-Abl with an IC50 value of 100 to 300 nM in various cell lines.

BCR-ABL gene is fused by the BCR and ABL1 genes [1]. BCR-ABL increased production of tyrosine kinase and played an essential role in the pathogenesis of chronic myelogenous leukemia (CML) [2].

Unlike imatinib that competitively inhibited the ATP-binding site of BCR-ABL kinase activity [3], GNF-2 allosterically inhibited (through binding the myristate-binding site of ABL[4]) the proliferation of BCR-ABL positive cell and induces cell apoptosis.  In Ba/F3.p210 Bcr-abl–expressing cells, 48 h treatment of GNF-2 was able to inhibit the proliferation of cells with an IC50 value of 138 nM [5].  In addition, GNF-2 has been found to inhibit E255V and Y253H mutant Ba/F3 cells cell growth, with an IC50 value of 268 and 194 nM, respectively [5]. GNF-2 also caused growth inhibition of K562 and SUP-B15 with an IC50 value of 273 nM and 268 nM, respectively[5].

Injecting with BCR-ABL–expressing Ba/F3-p210 cells, 4 % lymphocytes reduction in eperipheral blood was induced [6].

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