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Ex Vivo Multisite Electro-olfactogram Recordings in Rabbit Neonates.

Patricia Duchamp-Viret1, Marc Thévenet2, Gérard Coureaud2

  • 1ENES team, Centre de Recherche en Neurosciences de Lyon (CRNL), CNRS UMR 5292 - INSERM U1028 - Université Claude Bernard Lyon 1, Centre Hospitalier Le Vinatier, Bron Cedex, France. patricia.viret@cnrs.fr.

Methods in Molecular Biology (Clifton, N.J.)
|April 18, 2025
PubMed
Summary
This summary is machine-generated.

Electro-olfactogram (EOG) recording measures olfactory receptor neuron activity. This ex vivo technique in rabbits reveals pheromone sensitivity and odor learning, remaining a valuable, cost-effective research tool.

Keywords:
Ex vivo electro-olfactogramLearningNewborn rabbitOlfactory mucosaOlfactory receptor neuronsPheromone

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Area of Science:

  • Neuroscience
  • Olfactory Research
  • Animal Behavior

Background:

  • Electro-olfactogram (EOG) recording measures electrical activity from olfactory receptor neurons (ORNs) in response to odors.
  • Ex vivo preparation in mammals, developed in the late 1980s, allows for extended recordings and access to olfactory turbinates.
  • EOG has significantly advanced understanding of olfactory physiology, behavior, and disease links.

Purpose of the Study:

  • To highlight the continued relevance and versatility of EOG recordings in modern olfactory research.
  • To explore novel applications of EOG in studying the interplay between olfaction, diet, microbiota, and neurological conditions.
  • To showcase the utility of ex vivo multisite EOG in specific models like newborn rabbits.

Main Methods:

  • Utilized ex vivo multisite Electro-olfactogram (EOG) recording in newborn rabbits.
  • Applied EOG to investigate ORN sensitivity to natural pheromones (mammary pheromone).
  • Examined ORN involvement in pheromone-induced odor learning and processing of odor mixtures.

Main Results:

  • Demonstrated high native sensitivity of rabbit ORNs to mammary pheromones across the olfactory mucosa.
  • Observed ORN contribution to enhanced behavioral reactivity following pheromone-induced odor learning.
  • Showed differential processing of synthetic and analytical odor mixtures by ORNs.

Conclusions:

  • Ex vivo multisite EOG is a powerful tool for studying peripheral olfaction, even with advanced techniques available.
  • The method provides insights into olfactory-gastrointestinal and olfactory-neurological connections.
  • EOG is a simple, cost-effective, and promising technique for future olfactory research, particularly in neonates.