The results showed that HQP1351 alone exhibited potent antiproliferative activity in both cell lines in vitro, with nanomolar IC50 values . The activity was enhanced in the combination treatment with APG-115...In subcutaneous MV-4-11 xenograft model, treatment with HQP1351 or APG-115 single agents achieved T/C values of 28.6% and 59.6%, respectively . The combination achieved synergistic antitumor activity with a T/C value of 13.4%...Taken together, our data provide scientific rationale for clinical development of the combination of HQP1351 and APG-115 in FLT3-ITD mutant and TP53 wild-type AML patient.