[Effect of Selinexor on Proliferation and Apoptosis of Acute Myeloid Leukemia Kasumi-1 Cells].

Objective: To investigate the effects of selinexor, a inhibitor of nuclear export protein 1 (XPO1) on the proliferation inhibition and apoptosis of Kasumi-1 cells in acute myeloid leukemia (AML).

Methods: MTS method was used to detect the inhibitory effect of different concentrations of selinexor on the proliferation of Kasumi-1 cells at different time points. The apoptosis rate and cell cycle changes after treatment with different concentration of selinexor were detected by flow cytometry.

Results: Selinexor inhibited the growth of Kasumi-1 cells at different time points in a concentration-dependent manner (r _{24 h}=0.7592, r _{48 h}=0.9456, and r _{72 h}=0.9425). Selinexor inhibited Kasumi-1 cells growth in a time-dependent manner (r =0.9057 in 2.5 μmol/L group, r =0.9897 in 5 μmol/L group and r =0.9994 in 10 μmol/L group). Selinexor could induce apoptosis of Kasumi-1 cells in a dose-dependent manner (r =0.9732), and the apoptosis of Kasumi-1 cells was more obvious with the increase of drug concentration. The proportion of G₀/G₁ phase was significantly increased and the proportion of S phase was significantly decreased after the treatment of Kasumi-1 cells by selinexor. With the increase of drug concentration, the proportion of Kasumi-1 cells cycle arrest in G₀/G₁ phase was increased and the cell synthesis was decreased.

Conclusion: Selinexor can promote the death of tumor cells by inhibiting Kasumi-1 cells proliferation, inducing apoptosis and blocking cell cycle.