New insight into the catalytic -dependent and -independent roles of METTL3 in sustaining aberrant translation in chronic myeloid leukemia

Z. Ianniello, M. Sorci, Ginistrelli L. Ceci, A. Iaiza, M. Marchioni, C. Tito, E. Capuano, S. Masciarelli, T. Ottone, C. Attrotto, M. Rizzo, L. Franceschini, S. de Pretis, M. T. Voso, M. Pelizzola, F. Fazi*, A. Fatica*

*Autore corrispondente per questo lavoro

Risultato della ricerca: Contributo in rivistaArticolo

Abstract

Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm caused by the presence of tyrosine kinase BCR-ABL1 fusion protein, which deregulate transcription and mRNA translation. Tyrosine kinase inhibitors (TKIs) are the first-choice treatment. However, resistance to TKIs remains a challenge to cure CML patients. Here, we reveal that the m(6)A methyltransferase complex METTL3/METTL14 is upregulated in CML patients and that is required for proliferation of primary CML cells and CML cell lines sensitive and resistant to the TKI imatinib. We demonstrate that depletion of METTL3 strongly impairs global translation efficiency. In particular, our data show that METTL3 is crucial for the expression of genes involved in ribosome biogenesis and translation. Specifically, we found that METTL3 directly regulates the level of PES1 protein identified as an oncogene in several tumors. We propose a model in which nuclear METTL3/METTL14 methyltransferase complex modified nascent transcripts whose translation is enhanced by cytoplasmic localization of METTL3, independently from its catalytic activity. In conclusion, our results point to METTL3 as a novel relevant oncogene in CML and as a promising therapeutic target for TKI resistant CML.
Lingua originaleInglese
pagine (da-a)870-884
Numero di pagine15
RivistaCELL DEATH & DISEASE
Volume12
Numero di pubblicazione10
DOI
Stato di pubblicazionePubblicato - 2021
Pubblicato esternamente

All Science Journal Classification (ASJC) codes

  • Immunologia
  • Neuroscienze Cellulari e Molecolari
  • Biologia Cellulare
  • Ricerca sul Cancro

Keywords

  • Adenosine
  • BCR-ABL Positive
  • Biological
  • Catalysis
  • Cell Line
  • Cell Nucleus
  • Cell Proliferation
  • Cell Survival
  • Chronic
  • Drug Resistance
  • Gene Knockdown Techniques
  • Humans
  • Imatinib Mesylate
  • Leukemia
  • Messenger
  • Methyltransferases
  • Models
  • Myelogenous
  • Neoplasm
  • Protein Biosynthesis
  • Proto-Oncogene Proteins c-myc
  • RNA
  • RNA-Binding Proteins
  • Tumor
  • Up-Regulation

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