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http://dx.doi.org/10.3343/alm.2015.35.2.260DOI Listing

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Article Synopsis
  • This study identified a subgroup of acute myeloid leukemia (AML) patients with an APL-like immunophenotype characterized by the absence of CD34 and HLA-DR, aiming to explore differences in clinical and molecular features between them and regular AML patients.
  • Out of 191 patients analyzed, 32 exhibited this specific immunophenotype and were found to have a higher risk of developing disseminated intravascular coagulation (DIC) and showed distinct molecular characteristics, including more frequent NPM1 mutations and higher WT1 gene expression.
  • Despite being in a favorable risk category based on some parameters, patients with the CD34HLA-DR immunophenotype experienced shorter overall survival, underscoring the need
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Internal tandem duplications (ITD) in fms-like tyrosine kinase 3 (FLT3) represent the most common genetic alteration in de novo acute myeloid leukemia (AML). Here, we identify ribosomal protein s6 kinase a1 (RSK1) as a core dependency in FLT3-ITD AML and unveil the existence of crucial bi-directional regulation. RSK1 perturbation resulted in marked apoptosis and abrogated phosphorylation of FLT3 and associated downstream signaling cascades in FLT3-ITD AML cell lines.

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The gradual acquisition of genetic and epigenetic disturbances bestows malignant traits upon hematopoietic stem cells, subverting them into a founder and reservoir cell for de novo acute myeloid leukemia (AML) known as leukemic stem cells (LSC). Beyond its molecular heterogeneity, AML is also characterized by rewiring biological processes to support its onset and maintenance. LSC were observed to inherently and actively trigger mitochondrial turnover through selective autophagic removal such that impairing the process led to cell differentiation at the expense of its stemness.

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NAT10-mediated mRNA N-acetylcytidine reprograms serine metabolism to drive leukaemogenesis and stemness in acute myeloid leukaemia.

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RNA modification has emerged as an important epigenetic mechanism that controls abnormal metabolism and growth in acute myeloid leukaemia (AML). However, the roles of RNA N-acetylcytidine (ac4C) modification in AML remain elusive. Here, we report that ac4C and its catalytic enzyme NAT10 drive leukaemogenesis and sustain self-renewal of leukaemic stem cells/leukaemia-initiating cells through reprogramming serine metabolism.

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