...while the total level of MCL1 expression did not correlate with sensitivity to S63845, the occupational status of MCL1 with proapoptotic proteins proved as an important determinant of S63845 sensitivity...co-targeting of MCL1 and BCL2 (with S63845 and venetoclax) induced additive to synergistic anti-lymphoma effect in all tested PDX models. The data represent preclinical substantiation for novel salvage therapy of this prognostically adverse group of B-NHL patients.