ZH97 is a selective and covalent small-molecule inhibitor of BFL-1 protein with binding Ki of 0.41 uM, >200-fold selectivity over MCL-1.ZH97 does not bind to BCL-xL, BCL-2, TEAD2, TEAD4, MDM2, MDMX, BRD2 BD1, BRD2 BD2, BRD3 BD1, BRD3 BD2, BCL9, PD1/PD-L1 (Ki>400 uM).ZH97 modifies BFL-1 at the C55 residue, blocks BFL-1/BID interaction in vitro.ZH97 dose-dependently increased cytoplasmic cytochrome c level in U937 cells, has cell growth inhibition with IC50 of 2.8 uM, 5.5 uM, 7.7 uM, 6.8 uM, and 3.9 uM in U937, Kasumi-1, K562, MM.1S, and MV4-11 cell lines, respectively.ZH97 inhibits BFL-1/PUMA interaction in cell lysate and is effective in cancer cells that harboring highexpression level of BFL-1.
