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The pRb/RBL2-E2F1/4-GCN5 axis regulates cancer stem cell formation and G0 phase entry/exit by paracrine mechanisms

Author

Listed:
  • Chao-Hui Chang

    (University of Oxford)

  • Feng Liu

    (University of Oxford)

  • Stefania Militi

    (University of Oxford)

  • Svenja Hester

    (University of Oxford)

  • Reshma Nibhani

    (University of Oxford)

  • Siwei Deng

    (University of Oxford)

  • James Dunford

    (University of Oxford)

  • Aniko Rendek

    (Oxford University Hospitals NHS Foundation Trust)

  • Zahir Soonawalla

    (Oxford University Hospitals NHS)

  • Roman Fischer

    (University of Oxford)

  • Udo Oppermann

    (University of Oxford)

  • Siim Pauklin

    (University of Oxford)

Abstract

The lethality, chemoresistance and metastatic characteristics of cancers are associated with phenotypically plastic cancer stem cells (CSCs). How the non-cell autonomous signalling pathways and cell-autonomous transcriptional machinery orchestrate the stem cell-like characteristics of CSCs is still poorly understood. Here we use a quantitative proteomic approach for identifying secreted proteins of CSCs in pancreatic cancer. We uncover that the cell-autonomous E2F1/4-pRb/RBL2 axis balances non-cell-autonomous signalling in healthy ductal cells but becomes deregulated upon KRAS mutation. E2F1 and E2F4 induce whereas pRb/RBL2 reduce WNT ligand expression (e.g. WNT7A, WNT7B, WNT10A, WNT4) thereby regulating self-renewal, chemoresistance and invasiveness of CSCs in both PDAC and breast cancer, and fibroblast proliferation. Screening for epigenetic enzymes identifies GCN5 as a regulator of CSCs that deposits H3K9ac onto WNT promoters and enhancers. Collectively, paracrine signalling pathways are controlled by the E2F-GCN5-RB axis in diverse cancers and this could be a therapeutic target for eliminating CSCs.

Suggested Citation

  • Chao-Hui Chang & Feng Liu & Stefania Militi & Svenja Hester & Reshma Nibhani & Siwei Deng & James Dunford & Aniko Rendek & Zahir Soonawalla & Roman Fischer & Udo Oppermann & Siim Pauklin, 2024. "The pRb/RBL2-E2F1/4-GCN5 axis regulates cancer stem cell formation and G0 phase entry/exit by paracrine mechanisms," Nature Communications, Nature, vol. 15(1), pages 1-29, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47680-z
    DOI: 10.1038/s41467-024-47680-z
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