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D-2-hydroxyglutarate impairs DNA repair through epigenetic reprogramming

Author

Listed:
  • Fengchao Lang

    (National Cancer Institute)

  • Karambir Kaur

    (National Cancer Institute)

  • Haiqing Fu

    (National Cancer Institute)

  • Javeria Zaheer

    (National Cancer Institute)

  • Diego Luis Ribeiro

    (National Cancer Institute)

  • Mirit I. Aladjem

    (National Cancer Institute)

  • Chunzhang Yang

    (National Cancer Institute)

Abstract

Cancer-associated mutations in IDH are associated with multiple types of human malignancies, which exhibit distinctive metabolic reprogramming, production of oncometabolite D-2-HG, and shifted epigenetic landscape. IDH mutated malignancies are signatured with “BRCAness”, highlighted with the sensitivity to DNA repair inhibitors and genotoxic agents, although the underlying molecular mechanism remains elusive. In the present study, we demonstrate that D-2-HG impacts the chromatin conformation adjustments, which are associated with DNA repair process. Mechanistically, D-2-HG diminishes the chromatin interactions in the DNA damage regions via revoking CTCF binding. The hypermethylation of cytosine, resulting from the suppression of TET1 and TET2 activities by D-2-HG, contributes to the dissociation of CTCF from DNA damage regions. CTCF depletion leads to the disruption of chromatin organization around the DNA damage sites, which abolishes the recruitment of essential DNA damage repair proteins BRCA2 and RAD51, as well as impairs homologous repair in the IDH mutant cancer cells. These findings provide evidence that CTCF-mediated chromatin interactions play a key role in DNA damage repair proceedings. Oncometabolites jeopardize genome stability and DNA repair by affecting high-order chromatin structure.

Suggested Citation

  • Fengchao Lang & Karambir Kaur & Haiqing Fu & Javeria Zaheer & Diego Luis Ribeiro & Mirit I. Aladjem & Chunzhang Yang, 2025. "D-2-hydroxyglutarate impairs DNA repair through epigenetic reprogramming," Nature Communications, Nature, vol. 16(1), pages 1-13, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56781-2
    DOI: 10.1038/s41467-025-56781-2
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