Tegatrabetan

Tegatrabetan (BC-2059, BC2059, Tegavivint) is an orally bioavailable β-catenin antagonist that disrupts the binding of β-catenin to TBL1 and promotes β-catenin degradation, attenuates nuclear and cytoplasmic levels of β-catenin; reduces transcriptional activity of TCF4 and expression of its target genes, cyclin D1, c-MYC and survivin. BC treatment dose-dependently induced apoptosis of cultured and primary AML BPCs; significantly improves the median survival of immune-depleted mice engrafted with either cultured or primary AML BPCs.Blood Cancer Phase 1 Clinical (In Vitro) :Tegatrabetan (BC2059; 20-100 nM; 48 hours) inhibits cell proliferation in suspension culture over 120 hours and induces apoptosis of cultured human acute myeloid leukemia (AML) HL-60, OCI-AML3 and MV4-11 cells dose-dependently.Tegatrabetan (20 and 50 nM; 24 hours) induces a modest but significant accumulation of cells in the G0/G1 phase, with a concomitant decline in the G2/M phase of the cell cycle.Tegatrabetan (100 nM, 24 hours) depletes the levels of β-catenin and its target genes, including c-MYC and survivin without affecting the levels of the TBL1 in OCI-AML3, HL-60 and MV4-11 cells. (In Vivo) :Tegatrabetan (BC2059; 1.0 or 5.0 mg/kg/day; intravenously) significantly improves the median survival of the mice from approximately 17.5 to 39 days. Treatment with Tegatrabetan (10 mg/kg/day; intravenously) alone further improves the median survival to 51.5 days.