However, the expression levels of miR-29b in circ_0059707-K562 cells were slightly down-regulated, while the expression levels of ID1 were slightly up-regulated; these findings cannot explain the mechanism by which circ_0059707 inhibited the growth of leukemia cells in vitro and vivo; it is evident that other molecules must also be involved in this process. Here, ID1 is linked to leukemia.