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Ancient Clostridium DNA and variants of tetanus neurotoxins associated with human archaeological remains

Author

Listed:
  • Harold P. Hodgins

    (University of Waterloo)

  • Pengsheng Chen

    (Boston Children’s Hospital
    Harvard Medical School)

  • Briallen Lobb

    (University of Waterloo)

  • Xin Wei

    (University of Waterloo)

  • Benjamin J. M. Tremblay

    (University of Waterloo)

  • Michael J. Mansfield

    (Okinawa Institute of Science and Technology Graduate University)

  • Victoria C. Y. Lee

    (University of Waterloo)

  • Pyung-Gang Lee

    (Boston Children’s Hospital
    Harvard Medical School)

  • Jeffrey Coffin

    (University of Waterloo)

  • Ana T. Duggan

    (McMaster University)

  • Alexis E. Dolphin

    (University of Waterloo)

  • Gabriel Renaud

    (Technical University of Denmark)

  • Min Dong

    (Boston Children’s Hospital
    Harvard Medical School)

  • Andrew C. Doxey

    (University of Waterloo)

Abstract

The analysis of microbial genomes from human archaeological samples offers a historic snapshot of ancient pathogens and provides insights into the origins of modern infectious diseases. Here, we analyze metagenomic datasets from 38 human archaeological samples and identify bacterial genomic sequences related to modern-day Clostridium tetani, which produces the tetanus neurotoxin (TeNT) and causes the disease tetanus. These genomic assemblies had varying levels of completeness, and a subset of them displayed hallmarks of ancient DNA damage. Phylogenetic analyses revealed known C. tetani clades as well as potentially new Clostridium lineages closely related to C. tetani. The genomic assemblies encode 13 TeNT variants with unique substitution profiles, including a subgroup of TeNT variants found exclusively in ancient samples from South America. We experimentally tested a TeNT variant selected from an ancient Chilean mummy sample and found that it induced tetanus muscle paralysis in mice, with potency comparable to modern TeNT. Thus, our ancient DNA analysis identifies DNA from neurotoxigenic C. tetani in archaeological human samples, and a novel variant of TeNT that can cause disease in mammals.

Suggested Citation

  • Harold P. Hodgins & Pengsheng Chen & Briallen Lobb & Xin Wei & Benjamin J. M. Tremblay & Michael J. Mansfield & Victoria C. Y. Lee & Pyung-Gang Lee & Jeffrey Coffin & Ana T. Duggan & Alexis E. Dolphin, 2023. "Ancient Clostridium DNA and variants of tetanus neurotoxins associated with human archaeological remains," Nature Communications, Nature, vol. 14(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41174-0
    DOI: 10.1038/s41467-023-41174-0
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    References listed on IDEAS

    as
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