STAT5B and leukemia: In agreement, the present study revealed downregulation of STAT5 and c-Myc and inhibition of cell proliferation with apoptosis induction after TQ treatment of HL60 leukemia cells, suggesting that TQ inhibits cell proliferation and induces apoptosis of HL60 leukemia cells by inhibiting the STAT5/c-Myc mediated signaling.