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Related Experiment Videos

Vomeronasal/accessory olfactory system and pheromonal recognition

E B Keverne1

  • 1Sub-Department of Animal Behaviour, University of Cambridge, UK.

Chemical Senses
|October 6, 1998
PubMed
Summary

Mouse pregnancy block involves urinary pheromones. While brevicomins and dihydrothiazoles are key, polymorphic major urinary proteins likely mediate strain-specific recognition in this crucial reproductive process.

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Area of Science:

  • Reproductive biology
  • Animal behavior
  • Chemical ecology

Background:

  • Pregnancy block in mice is triggered by exposure to unfamiliar male urinary pheromones.
  • Known pheromones like brevicomins and dihydrothiazoles activate shared sensory pathways involved in reproduction.
  • These identified pheromones alone do not explain strain-specific recognition.

Purpose of the Study:

  • To investigate the role of major urinary proteins (MUPs) in mediating strain-specific pheromone recognition during mouse pregnancy block.
  • To elucidate the mechanism by which MUPs contribute to the discrimination of male urinary signals.

Main Methods:

  • Analysis of known mouse pheromones (brevicomins, dihydrothiazoles).
  • Investigation of the function of polymorphic major urinary proteins (MUPs) from the lipocalin family.
  • Examination of MUPs as transporters for pheromones and their strain-specific variations.

Main Results:

  • Brevicomins and dihydrothiazoles are identified as key pheromones inducing estrus and puberty.
  • These simple compounds lack the ability to differentiate between mouse strains.
  • Major urinary proteins, which vary across strains, act as transporters for these pheromones.

Conclusions:

  • Major urinary proteins are essential for pheromone recognition in the context of pregnancy block.
  • The polymorphic nature of MUPs likely enables the coding of strain-specific information in mouse pheromonal communication.
  • MUPs play a critical role in the complex interplay of chemical signaling and reproductive success in mice.

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