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PeerPub: A Device for Concurrent Operant Oral Self-Administration by Multiple Rats.

Paige M Lemen1, Jie Ni1, Jun Huang1

  • 1Department of Pharmacology, Addiction Science and Toxicology, University of Tennessee Health Science Center, Memphis, Tennessee 38163.

Eneuro
|January 2, 2025
PubMed
Summary

Rats in social settings consumed more sweetened solutions than when alone, demonstrating the impact of social environments on motivated behavior. This new operant chamber system, PeerPub, facilitates such social research.

Keywords:
addictionbehaviordrugoperant conditioningratself-administration

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Addiction Research

Background:

  • The social environment significantly influences substance use.
  • Operant conditioning models are crucial for studying motivated behavior in rodents.
  • Existing operant chambers typically house only one animal, limiting social interaction studies.

Purpose of the Study:

  • To introduce PeerPub, a novel social operant chamber designed for simultaneous rodent testing.
  • To evaluate PeerPub's efficacy in modeling social influences on motivated behavior.

Main Methods:

  • PeerPub utilizes touch sensors to monitor licking behavior and RFID chips for individual rat identification.
  • A Raspberry Pi computer manages the system, dispensing rewards based on a fixed-ratio schedule.
  • Sprague Dawley rats were tested in daily 1-hour sessions with a glucose-saccharin solution (supersac).

Main Results:

  • Male rats exhibited increased supersac consumption in paired (dual-rat) conditions compared to isolated (single-rat) conditions.
  • The PeerPub system successfully tracked licking behavior and reward delivery.

Conclusions:

  • PeerPub is an effective tool for studying the interplay between motivated behavior and social context in rodents.
  • This technology can advance research into the role of social environments in substance use disorder phenotypes.