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Brd7 loss reawakens dormant metastasis initiating cells in lung by forging an immunosuppressive niche

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  • Jayanta Mondal

    (University of Texas MD Anderson Cancer Center
    The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences
    The University of Texas MD Anderson Cancer Center)

  • Junfeng Zhang

    (The University of Texas MD Anderson Cancer Center
    Guangzhou International Bio Island)

  • Feng Qing

    (Guangzhou International Bio Island)

  • Shunping Li

    (Guangzhou International Bio Island)

  • Dhiraj Kumar

    (New York
    New York
    Interventional Oncology)

  • Jason T. Huse

    (University of Texas MD Anderson Cancer Center
    University of Texas MD Anderson Cancer Center)

  • Filippo G. Giancotti

    (New York
    New York)

Abstract

Metastasis in cancer is influenced by epigenetic factors. Using an in vivo screen, we demonstrate that several subunits of the polybromo-associated BAF (PBAF) chromatin remodeling complex, particularly Brd7, are required for maintaining breast cancer metastatic dormancy in the lungs of female mice. Brd7 loss induces metastatic reawakening, along with modifications in epigenomic landscapes and upregulated oncogenic signaling. Breast cancer cells harboring Brd7 inactivation also reprogram the surrounding immune microenvironment by downregulating MHC-1 expression and promoting a pro-metastatic cytokine profile. Flow cytometric and single-cell analyses reveal increased levels of pro-tumorigenic inflammatory and transitional neutrophils, CD8+ exhausted T cells, and CD4+ stress response T cells in lungs from female mice harboring Brd7-deficient metastases. Finally, attenuating this immunosuppressive milieu by neutrophil depletion, neutrophil extracellular trap (NET) inhibition, or immune checkpoint therapy abrogates metastatic outgrowth. These findings implicate Brd7 and PBAF in triggering metastatic outgrowth in cancer, pointing to targetable underlying mechanisms involving specific immune cell compartments.

Suggested Citation

  • Jayanta Mondal & Junfeng Zhang & Feng Qing & Shunping Li & Dhiraj Kumar & Jason T. Huse & Filippo G. Giancotti, 2025. "Brd7 loss reawakens dormant metastasis initiating cells in lung by forging an immunosuppressive niche," Nature Communications, Nature, vol. 16(1), pages 1-20, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56347-2
    DOI: 10.1038/s41467-025-56347-2
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