By contrast, ATR inhibitor VE-821 (2.5mM) was efficient in both types of HMCLs (mean of death in TP53wt was 45% and 28% in TP53abn HMCLs, p=0.6)….Preliminary results of combos in 6 consecutive primary samples with MM or plasma cell leukemia (3 TP53wt and 3 TP53abn) demonstrated efficacy.