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Cross-talk between adenosine and opioid receptors

Jason N Peart1, Garrett J Gross

  • 1Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA. jpeart@mcw.edu

Drug News & Perspectives
|July 22, 2005
PubMed

Insights

Opioid and adenosine receptors interact, influencing protection against ischemic injury in the brain and heart. Blocking one receptor family can negate the protective effects of the other.

Area of Science:

  • Pharmacology
  • Neuroscience
  • Cardiovascular Physiology

Background:

  • Opioid and adenosine receptors are G-protein-coupled receptors involved in various physiological and pathophysiological processes.
  • Both receptor families offer protection against ischemic injury in the central nervous system (CNS) and myocardium.
  • Existing research suggests a significant interaction between opioid and adenosine receptor signaling pathways.

Purpose of the Study:

  • To review and highlight research demonstrating the interaction between opioid and adenosine receptors.
  • To explore how this interaction impacts protection against ischemic injury in the CNS and myocardium.

Main Methods:

  • Literature review of studies investigating opioid and adenosine receptor interactions.
  • Analysis of research data from both central nervous system and myocardial studies.
  • Examination of receptor sensitivity alterations and endogenous adenosine release in response to morphine.

Main Results:

  • Evidence indicates a close interplay between opioid and adenosine receptors, affecting receptor sensitivity and endogenous adenosine levels.
  • The cardioprotective effects mediated by adenosine can be diminished by opioid receptor antagonists, and vice versa.
  • This interaction is observed in both central nervous system and myocardial tissues.

Conclusions:

  • Opioid and adenosine receptors exhibit a significant functional interaction.
  • This interaction plays a crucial role in the protective mechanisms against ischemic injury in the brain and heart.
  • Further research into this receptor crosstalk may reveal novel therapeutic strategies for ischemic conditions.

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