GNF-5, when used in combination with imatinib or nilotinib, suppresses the emergence of resistance mutations in vitro, and displays additive inhibitory activity in biochemical and cellular assays against Bcr-Abl T315I mutant. GNF-5 shows potent antiproliferative activity with EC50 of 430 nM and 580 nM against wt-Bcr-Abl and E255K mutant Bcr-Abl transformed cells, respectively.
In vivo
GNF-5 (100 mg/kg ) displays efficacy on wild-type and T315I Bcr-Abl dependent proliferation in xenograft and bone marrow transplantation models. Moreover, a combination of GNF-5 (75 mg/kg) with nilotinib (50 mg/kg) results in improved overall survival in a T315I Bcr-Abl BMT model.