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Reprogramming the tumor immune microenvironment using engineered dual-drug loaded Salmonella

Author

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  • Dinh-Huy Nguyen

    (Chonnam National University Medical School
    Chonnam National University Medical School and Hwasun Hospital
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School)

  • Sung-Hwan You

    (CNCure Co. Ltd)

  • Hien Thi-Thu Ngo

    (Chonnam National University Medical School
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School
    Hanoi Medical University, Dong Da)

  • Khuynh Nguyen

    (Chonnam National University Medical School
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School)

  • Khang Vuong Tran

    (Chonnam National University Medical School
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School)

  • Tan-Huy Chu

    (Chonnam National University Hwasun Hospital)

  • So-young Kim

    (Chonnam National University Medical School
    CNCure Co. Ltd)

  • Sang-Jun Ha

    (Yonsei University)

  • Yeongjin Hong

    (Chonnam National University Medical School
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School
    CNCure Co. Ltd
    Chonnam National University Medical School)

  • Jung-Joon Min

    (Chonnam National University Medical School
    Chonnam National University Medical School and Hwasun Hospital
    Department of Biomedical Science (BrainKorea21 Plus) Chonnam National University Graduate School
    CNCure Co. Ltd)

Abstract

Synergistic combinations of immunotherapeutic agents can improve the performance of anti-cancer therapies but may lead to immune-mediated adverse effects. These side-effects can be overcome by using a tumor-specific delivery system. Here, we report a method of targeted immunotherapy using an attenuated Salmonella typhimurium (SAM-FC) engineered to release dual payloads: cytolysin A (ClyA), a cytolytic anti-cancer agent, and Vibrio vulnificus flagellin B (FlaB), a potent inducer of anti-tumor innate immunity. Localized secretion of ClyA from SAM-FC induces immunogenic cancer cell death and promotes release of tumor-specific antigens and damage-associated molecular patterns, which establish long-term antitumor memory. Localized secretion of FlaB promotes phenotypic and functional remodeling of intratumoral macrophages that markedly inhibits tumor metastasis in mice bearing tumors of mouse and human origin. Both primary and metastatic tumors from bacteria-treated female mice are characterized by massive infiltration of anti-tumorigenic innate immune cells and activated tumor-specific effector/memory T cells; however, the percentage of immunosuppressive cells is low. Here, we show that SAM-FC induces functional reprogramming of the tumor immune microenvironment by activating both the innate and adaptive arms of the immune system and can be used for targeted delivery of multiple immunotherapeutic payloads for the establishment of potent and long-lasting antitumor immunity.

Suggested Citation

  • Dinh-Huy Nguyen & Sung-Hwan You & Hien Thi-Thu Ngo & Khuynh Nguyen & Khang Vuong Tran & Tan-Huy Chu & So-young Kim & Sang-Jun Ha & Yeongjin Hong & Jung-Joon Min, 2024. "Reprogramming the tumor immune microenvironment using engineered dual-drug loaded Salmonella," Nature Communications, Nature, vol. 15(1), pages 1-17, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50950-5
    DOI: 10.1038/s41467-024-50950-5
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    References listed on IDEAS

    as
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