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Intracellular delivery of protein drugs with an autonomously lysing bacterial system reduces tumor growth and metastases

Author

Listed:
  • Vishnu Raman

    (University of Massachusetts, Amherst
    Ernest Pharmaceuticals, LLC)

  • Nele Van Dessel

    (University of Massachusetts, Amherst
    Ernest Pharmaceuticals, LLC)

  • Christopher L. Hall

    (University of Massachusetts, Amherst
    Ernest Pharmaceuticals, LLC)

  • Victoria E. Wetherby

    (Ernest Pharmaceuticals, LLC)

  • Samantha A. Whitney

    (University of Massachusetts, Amherst)

  • Emily L. Kolewe

    (University of Massachusetts, Amherst)

  • Shoshana M. K. Bloom

    (University of Massachusetts, Amherst)

  • Abhinav Sharma

    (University of Massachusetts, Amherst)

  • Jeanne A. Hardy

    (University of Massachusetts, Amherst
    University of Massachusetts, Amherst
    University of Massachusetts, Amherst)

  • Mathieu Bollen

    (KU Leuven)

  • Aleyde Van Eynde

    (KU Leuven)

  • Neil S. Forbes

    (University of Massachusetts, Amherst
    Ernest Pharmaceuticals, LLC
    University of Massachusetts, Amherst
    University of Massachusetts, Amherst)

Abstract

Critical cancer pathways often cannot be targeted because of limited efficiency crossing cell membranes. Here we report the development of a Salmonella-based intracellular delivery system to address this challenge. We engineer genetic circuits that (1) activate the regulator flhDC to drive invasion and (2) induce lysis to release proteins into tumor cells. Released protein drugs diffuse from Salmonella containing vacuoles into the cellular cytoplasm where they interact with their therapeutic targets. Control of invasion with flhDC increases delivery over 500 times. The autonomous triggering of lysis after invasion makes the platform self-limiting and prevents drug release in healthy organs. Bacterial delivery of constitutively active caspase-3 blocks the growth of hepatocellular carcinoma and lung metastases, and increases survival in mice. This success in targeted killing of cancer cells provides critical evidence that this approach will be applicable to a wide range of protein drugs for the treatment of solid tumors.

Suggested Citation

  • Vishnu Raman & Nele Van Dessel & Christopher L. Hall & Victoria E. Wetherby & Samantha A. Whitney & Emily L. Kolewe & Shoshana M. K. Bloom & Abhinav Sharma & Jeanne A. Hardy & Mathieu Bollen & Aleyde , 2021. "Intracellular delivery of protein drugs with an autonomously lysing bacterial system reduces tumor growth and metastases," Nature Communications, Nature, vol. 12(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26367-9
    DOI: 10.1038/s41467-021-26367-9
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    References listed on IDEAS

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    1. Jorge E. Galán & Hans Wolf-Watz, 2006. "Protein delivery into eukaryotic cells by type III secretion machines," Nature, Nature, vol. 444(7119), pages 567-573, November.
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    Cited by:

    1. Dinh-Huy Nguyen & Ari Chong & Yeongjin Hong & Jung-Joon Min, 2023. "Bioengineering of bacteria for cancer immunotherapy," Nature Communications, Nature, vol. 14(1), pages 1-5, December.

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