A-1210477 is an effective and specific MCL-1 and Bcl-2 inhibitor (Ki/IC50: 0.454/26.2 nM).

In H929 cells, A-1210477 binds to MCL-1 with high affinity and induces MCL-1 protein elevation. In H929, H2110, and H23 cells, A-1210477 induce the hallmarks of apoptosis, and inhibits MCL-1-dependent cell viability. A-1210477 also synergizes with navitoclax to kill a variety of cancer cell lines. [1] In SKBR3 cells, A-1210477 inhibits MCL-1–BIM interaction and induces classical features of apoptosis. [2] In addition, A-1210477 sensitizes non-Hodgkin's lymphoma cell lines to venetoclax (ABT-199). [3]

Binding affinity assays: TR-FRET-binding affinity assays are performed for BCL-2, BCL-XL, and MCL-1 in 4.52?mM monobasic potassium phosphate, 15.48?mM dibasic potassium phosphate, 1?mM sodium EDTA, 0.05% Pluronic F-68 detergent, 50?mM sodium chloride, and 1?mM DTT (pH 7.5). For MCL-1 assays, GST-tagged MCL-1 (1?nM) is mixed with 100?nM f-Bak, 1?nM Tb-labeled anti-GST antibody, and compound at room temperature (RT) for 60?min. Fluorescence is measured on an Envision plate reader using a 340/35?nm excitation filter and 520/525 (f-Bak) and 495/510?nm (Tb-labeled anti-GST antibody) emission filters.

Adherent cell lines are seeded at 50?000 cells per well in 96-well plates and treated for 48?h with compounds diluted in half-log steps starting at 30?μM and ending at 0.001?μM. Multiple myeloma cell lines were seeded at 15?000–20?000 cells per well and treated similarly. Effects on proliferation and viability were determined using CellTiter-Glo reagent according to the manufacturer's instructions. IC50 values are determined by non-linear regression analysis of the concentration response data.(Only for Reference)