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A total of 133 patients with acute myeloid leukemia (AML) were enrolled in the current study and were subdivided into 4 groups: 34 harboring DNA methyltransferase 3 α (DNMT3A) + fms related tyrosine kinase 3-internal tandem duplication (FLT3-ITD) mutations, 37 harboring only FLT3-ITD mutation, 32 harboring only DNMT3A mutation and 30 harboring no mutations in DNMT3A and FLT3-ITD (control). Patients in all groups were administered daunorubicin and cytarabine chemotherapy regimens. The rates of complete remission (CR), 1-year relapse (RR) and 3-year overall survival (OS) were compared. Patients in the DNMT3A + FLT3-ITD mutation group exhibited higher proportions of peripheral white blood cells (WBCs) and myeloid progenitor cells compared with those in DNMT3A mutation only, FLT3-ITD mutation only and control groups (P&lt;0.05). The rates of CD15 + and HLA-DR + in the DNMT3A + FLT3-ITD mutation and DNMT3A mutation only groups were significantly higher than those in the FLT3-ITD mutation only and control groups (P&lt;0.05); in addition, the rate of CD38 + in the DNMT3A + FLT3-ITD mutation and FLT3-ITD mutation only groups was significantly higher compared with that in the DNMT3A mutation only and control groups (P&lt;0.05). The overall chemotherapy effectiveness rate, CR, 1-year RR and the 3-year OS rates of patients in the DNMT3A + FLT3-ITD mutation group were significantly worse compared with FLT3-ITD mutation only, DNMT3A mutation only and control groups (P&lt;0.05). The results of this study indicated that increased mutation rates in DNMT3A and FLT3-ITD may be associated with increased WBC and myeloid progenitor cell counts, an inferior chemotherapy efficacy and prognosis, a lower CR rate, and higher 1-year RR and mortality rate.

Association between increased mutation rates in DNMT3Α and FLT3‑ITD and poor prognosis of patients with acute myeloid leukemia