N-MYC regulates cell survival via eIF4G1 in inv(16) acute myeloid leukemia

Sci Adv. 2024 Mar;10(9):eadh8493. doi: 10.1126/sciadv.adh8493. Epub 2024 Feb 28.

Abstract

N-MYC (encoded by MYCN) is a critical regulator of hematopoietic stem cell function. While the role of N-MYC deregulation is well established in neuroblastoma, the importance of N-MYC deregulation in leukemogenesis remains elusive. Here, we demonstrate that N-MYC is overexpressed in acute myeloid leukemia (AML) cells with chromosome inversion inv(16) and contributes to the survival and maintenance of inv(16) leukemia. We identified a previously unknown MYCN enhancer, active in multiple AML subtypes, essential for MYCN mRNA levels and survival in inv(16) AML cells. We also identified eukaryotic translation initiation factor 4 gamma 1 (eIF4G1) as a key N-MYC target that sustains leukemic survival in inv(16) AML cells. The oncogenic role of eIF4G1 in AML has not been reported before. Our results reveal a mechanism whereby N-MYC drives a leukemic transcriptional program and provides a rationale for the therapeutic targeting of the N-MYC/eIF4G1 axis in myeloid leukemia.

MeSH terms

  • Carcinogenesis
  • Cell Survival / genetics
  • Hematopoietic Stem Cells
  • Humans
  • Leukemia, Myeloid, Acute* / genetics
  • N-Myc Proto-Oncogene Protein

Substances

  • N-Myc Proto-Oncogene Protein