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Establishment and Maintenance of Gnotobiotic American Cockroaches Periplaneta americana
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Gnotobiotics: Past, present and future.

Marijana Basic1, André Bleich1

  • 1Institute for Laboratory Animal Science, Hannover Medical School, Germany.

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Summary

Gnotobiotics research uses animals with known microbial states, advancing understanding of host-microbe interactions. This field is crucial for developing new therapies and microbiome research strategies.

Keywords:
germ-freegnotobiologygnotobioticgnotobioticsisolatorsmicrobiomemicrobiotashort-term housing

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Area of Science:

  • Microbiology
  • Animal Research

Background:

  • Gnotobiotics, the study of organisms with a known microbial state, has roots in late 19th-century germ-free animal research.
  • Early advancements occurred at the University of Notre Dame's Laboratories of Bacteriology (LOBUND).
  • Initial goals included developing husbandry equipment and characterizing germ-free animal phenotypes.

Purpose of the Study:

  • To detail the historical development and technical advancements in gnotobiotics.
  • To highlight the significance of gnotobiotic models in studying host-microbe interactions and disease.
  • To emphasize the future role of gnotobiotics in microbiome research and therapeutic development.

Main Methods:

  • Development of specialized isolators, from rigid-wall chambers to flexible-film polyvinyl plastic designs.
  • Establishment of long-term (positive-pressure isolators) and short-term husbandry systems for gnotobiotic rodents.
  • Rederivation of germ-free animals via hysterectomy or embryo transfer, coupled with regular microbiological monitoring.

Main Results:

  • Germ-free rodents exhibit distinct physiology and anatomy compared to specified pathogen-free (SPF) rodents.
  • Gnotobiotic models offer powerful tools for analyzing host-microbe interactions in complex disease models.
  • Integration of gnotobiotic models with 'omics' approaches is vital for microbiome research advancements.

Conclusions:

  • Gnotobiotics is essential for dissecting host-microbe interactions and advancing microbiome research.
  • Gnotobiotic models are key to identifying novel therapeutic targets.
  • Establishing gnotobiotic core facilities is recommended to support future research applications.