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Related Experiment Videos

Interleukins counteract opioid agonists immunosuppression.

E E Karagouni1, L Hadjipetrou-Kourounakis

  • 1Faculty of Sciences, Aristotelian University, Thessaloniki, Greece.

The International Journal of Neuroscience
|September 1, 1990
PubMed
Summary

Novel analgesic PM suppressed immune cell responses. Interleukin-1 (IL-1) and Interleukin-2 (IL-2) reversed this effect, suggesting lymphokines act as opioid antagonists.

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Area of Science:

  • Immunology
  • Neuroscience
  • Pharmacology

Background:

  • Opioid agonists can suppress immune function.
  • The role of endogenous opioid systems in immune regulation is not fully understood.

Purpose of the Study:

  • To investigate the effects of a novel analgesic, PM, on lymphocyte function.
  • To explore the potential interaction between lymphokines (IL-1 and IL-2) and opioid receptor pathways.

Main Methods:

  • Murine lymphocyte cultures were treated with the analgesic PM.
  • Mitogenic response to Concanavalin A (Con A) and interleukin 2 production were measured.
  • The effects of IL-1 and IL-2, alone and in combination, on PM-induced immunosuppression were assessed.

Main Results:

  • PM dose-dependently inhibited Con A-induced mitogenesis and IL-2 production.
  • IL-1 and IL-2 together counteracted the immunosuppressive effects of PM and Pethidine (an opioid agonist).
  • These counteracting effects mimicked naloxone's action, suggesting opioid receptor involvement.

Conclusions:

  • IL-1 and IL-2 exhibit opioid antagonist-like properties in vitro.
  • These lymphokines may function as endogenous opioid receptor antagonists against endogenous opioid agonists.
  • Findings support a role for lymphokines in modulating the endogenous opioid system's impact on immunity.

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