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ILF2 Is a Regulator of RNA Splicing and DNA Damage Response in 1q21-Amplified Multiple Myeloma

Matteo Marchesini1, Yamini Ogoti1, Elena Fiorini1

  • 1Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.

Cancer Cell
|July 4, 2017
PubMed

Insights

Amplification of 1q21 in multiple myeloma (MM) elevates ILF2, promoting genomic instability and resistance to DNA-damaging agents. Targeting this pathway could improve treatments for high-risk MM patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • 1q21 amplification is common in multiple myeloma (MM), linked to progression and drug resistance.
  • Overexpression of ILF2 is a consequence of 1q21 amplification in MM.

Purpose of the Study:

  • To investigate the role of ILF2 in mediating resistance to DNA-damaging agents in MM.
  • To elucidate the molecular mechanisms by which ILF2 confers drug resistance.

Main Methods:

  • Analysis of 1q21 amplification and ILF2 expression in MM patient samples.
  • Investigating the effect of ILF2 on genomic instability and DNA repair pathways.
  • Studying the interaction of ILF2 with YB-1 and U2AF65 in response to genotoxic stress.

Main Results:

  • 1q21 amplification drives ILF2 overexpression in MM.
  • Elevated ILF2 promotes tolerance to genomic instability and resistance to DNA-damaging agents.
  • ILF2 modulates YB-1 nuclear localization and U2AF65 interaction, enhancing mRNA processing and homologous recombination repair.

Conclusions:

  • ILF2 overexpression, driven by 1q21 amplification, is a key mechanism of drug resistance in MM.
  • The ILF2-mediated regulation of RNA splicing in DNA repair genes offers a potential therapeutic target.
  • Targeting this pathway may optimize DNA-damaging agent efficacy in high-risk MM.
Keywords:
1q21 amplificationDNA damageDNA repairILF2multiple myelomasplicing

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