CD34 and chronic myelogenous leukemia, BCR-ABL1 positive: Regarding the involvement of miRNAs in chronic myeloid leukemia (CML) pathogenesis, recently it has been shown that miR-155 was highly up-regulated in CD34+ CML cells and allowed to evade growth-inhibitory effects of the TGF-β1 and bone morphogenetic protein (BMP) signaling; these findings provided new perspectives for miR-155 as a potential target for CML therapy [140].