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METTL3, an Independent Adverse Prognostic Factor for AML, Promotes the Development of AML by Modulating the

Yuqian Tang1, Xiaoyan Liu1,2, Wu Ye1

  • 1Department of Hematology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.

Cancer Medicine
|April 2, 2025
PubMed
Abstract

Insights

The m6A RNA-modifying enzyme METTL3 is linked to poor prognosis in acute myeloid leukemia (AML). METTL3 influences the PGC-1α oncogene, impacting MAPK signaling and antioxidant systems in AML progression.

Area of Science:

  • Epigenetics
  • Molecular Biology
  • Oncology

Background:

  • m6A is a key mRNA modification in mammals.
  • m6A enzymes are implicated in acute myeloid leukemia (AML) but their clinical relevance and mechanisms are unclear.

Purpose of the Study:

  • To define the clinical relevance of m6A RNA-modifying enzymes in AML.
  • To elucidate the mechanisms by which these enzymes modulate AML.

Main Methods:

  • Quantified expression of METTL3, METTL14, WTAP, FTO, and ALKBH5 in AML patients.
  • Performed METTL3 and PGC-1α knockdown experiments in AML cell lines (K562, MV4-11).
  • Analyzed MAPK signaling pathway and antioxidant system gene expression.
  • Correlated PGC-1α and METTL3 mRNA levels with patient prognosis using TCGA and GSE13159 datasets.

Main Results:

  • Elevated expression of m6A enzymes, including METTL3, was observed in AML patients.
  • METTL3 expression correlated with DNMT3A mutations and predicted poor prognosis.
  • METTL3 knockdown decreased m6A levels of PGC-1α, a mitochondrial oxidative stress gene.
  • PGC-1α knockdown affected MAPK signaling and antioxidant genes, and high PGC-1α expression indicated poor prognosis.

Conclusions:

  • METTL3 is an independent prognostic factor for poor outcomes in AML.
  • METTL3 regulates PGC-1α expression via m6A modification.
  • PGC-1α functions as an oncogene in AML by influencing the MAPK pathway and antioxidant system.
Keywords:
METTL3PGC‐1αWTAPacute myeloid leukemiam6A RNA methylation

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