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Methyltransferase-like 13 (METTL13) plays an oncogenic role in leukemia. This study reveals METTL13’s involvement in pre-leukemic transformation and T-cell acute lymphoblastic leukemia (T-ALL) development.

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Area of Science:

  • Epitranscriptomics
  • Cancer Biology
  • Hematopoiesis

Background:

  • Post-transcriptional RNA modifications regulate hematopoietic stem cell (HSC) functions.
  • The roles of methyltransferase (METTL)-family genes in HSCs and leukemia are not fully understood.

Purpose of the Study:

  • To investigate the epitranscriptomic landscape in hematopoietic stem and progenitor cells (HSPCs) upon METTL-family gene knockdown.
  • To elucidate the specific roles of METTL3, METTL14, and METTL13 in HSC regulation and leukemogenesis.

Main Methods:

  • Knockdown of METTL-family genes in HSPCs.
  • Analysis of gene expression changes and oncogenic pathways.
  • In vitro and in vivo functional assays in T-cell acute lymphoblastic leukemia (T-ALL) models.

Main Results:

  • METTL13 showed unique upregulation with adenosine deaminase acting on RNA 1 (ADAR1) overexpression, unlike other METTL genes.
  • METTL13 knockdown altered genes critical for oncogenic development in HSPCs.
  • METTL13 is essential for T-ALL cell proliferation and survival, and linked to high-risk pediatric T-ALL.

Conclusions:

  • METTL13 has a previously unrecognized oncogenic function in pre-leukemic transformation.
  • METTL13 is a key driver in T-ALL pathogenesis, highlighting its potential as a therapeutic target.