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We previously showed that the MEK inhibitor AZD6244 induced apoptosis in acute myelogenous leukemia (AML) HL60 cells. However, the mechanisms of AZD6244 to induce apoptosis remain to be fully elucidated. This study found that exposure of HL60 cells to AZD6244 down-regulated the levels of phosphor (p)-4E-binding protein 1 (4E-BP1), a substrate of mammalian target of rapamycin complex 1 (mTORC1), and...
The mitogen-activated protein kinase/ERK kinase (MEK)/ERK pathway was shown to be constitutively activated in a large number of acute myelogenous leukemia (AML) cells, suggesting the important roles of this pro-survival signaling in leukemogenesis and proliferation of AML cells. This study explored the impact of the MEK inhibitor AZD6244 on the effect of cytarabien (AraC), one of the most commonly...
The FMS-like tyrosine kinase 3 (FLT3) is a cell surface receptor tyrosine kinase. Activating mutations of this gene occur in nearly 30% of acute myelogenous leukemia (AML) patients. These mutations, in part, result in activation of mitogen-activated protein kinase (MEK)/extracellular signal-regulated kinase (ERK) signaling pathways. In this study, we found that AZD6244 (ARRY-142886), a novel inhibitor...
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