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Related Experiment Videos

The opioid system and temperature regulation.

M W Adler1, E B Geller, C E Rosow

  • 1Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.

Annual Review of Pharmacology and Toxicology
|January 1, 1988
PubMed
Summary

Opioid drugs significantly impact body temperature regulation by interacting with specific opioid receptors. Mu receptor activation promotes heat gain, while kappa receptor activation leads to heat loss, influencing thermoregulation.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Physiology

Background:

  • Opioid drugs and endogenous opioid peptides are known to influence body temperature.
  • The precise effect on thermoregulation is complex, depending on various factors including species and receptor type.

Purpose of the Study:

  • To investigate the functional role of opioid ligands and receptors in thermoregulation.
  • To elucidate the specific roles of different opioid receptor subtypes (mu, kappa, delta) in controlling body temperature.

Main Methods:

  • Review of accumulating evidence on opioid system involvement in thermoregulation.
  • Analysis of factors influencing opioid-induced thermoregulatory responses.
  • Hypothesizing receptor localization and function based on existing data.

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Main Results:

  • Mu receptor activation in rats and mice is associated with heat gain responses.
  • Kappa receptor activation appears to mediate opposite thermoregulatory responses (heat loss).
  • Mu receptors are primarily brain-located, while kappa receptors may be located outside the central nervous system.

Conclusions:

  • Opioid receptors, particularly mu and kappa, play a significant role in thermoregulation, though the system may not be tonically active.
  • Understanding these mechanisms offers insights into neurotransmitter interactions in temperature control.
  • Further research is needed to fully define the roles, mechanisms, and species-generalizability of opioid involvement in thermoregulation.