Fig. 8. Schematic representation of a model for the role of miR-143 in granulopoiesis and in AML.
During granulopoiesis, miR-143 expression is upregulated which in turn leads to repression of ERK5 and its downstream target c-myc resulting in myeloid differentiation. In AML, miR-143 is differentially expressed by various mechanisms. High miR-143 expression leads to better overall survival of AML patients whereas low miR-143 AML patients have a poor outcome. Overexpression of miR-143 in AML cells results in enhanced apoptosis and alters the susceptibility of those cells to chemotherapy