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Related Experiment Videos

Angiogenesis: modulation with opioids.

A Pasi1, B X Qu, R Steiner

  • 1Institute of Forensic Medicine, University of Zurich, Switzerland.

General Pharmacology
|January 1, 1991
PubMed
Summary
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Opioids like beta-endorphin (beta-EP) and morphine sulfate (MS) significantly reduce blood vessel growth. Naloxone (NX) did not reverse these anti-angiogenesis effects, suggesting opioid involvement in vascular cell proliferation.

Area of Science:

  • Pharmacology
  • Angiogenesis research
  • Immunology

Background:

  • Opioids are known for their analgesic properties.
  • The role of endogenous opioids like beta-endorphin in physiological processes beyond pain is an area of ongoing research.
  • Vascular endothelial cell proliferation is crucial for angiogenesis, the formation of new blood vessels.

Purpose of the Study:

  • To investigate the effect of beta-endorphin (beta-EP) and morphine sulfate (MS) on blood vessel proliferation in the chicken chorioallantoic membrane.
  • To determine if naloxone (NX), an opioid antagonist, can reverse the effects of beta-EP and MS on angiogenesis.
  • To explore the potential involvement of opioids in vascular endothelial cell proliferation.

Main Methods:

  • The study utilized the chicken chorioallantoic membrane model to assess angiogenesis.

Related Experiment Videos

  • Beta-endorphin (beta-EP) and morphine sulfate (MS) were administered in varying doses.
  • Naloxone (NX) was used in conjunction with beta-EP and MS to evaluate potential reversal of effects.

    • Main Results:

    • Both beta-endorphin (beta-EP) and morphine sulfate (MS) significantly reduced blood vessel proliferation by approximately 50% at specific doses.
    • A single dose of 5 micrograms of beta-EP alone did not show significant inhibition compared to its combined use with naloxone.
    • Naloxone (NX) did not significantly reverse the anti-angiogenic effects of either morphine sulfate or beta-endorphin.

    Conclusions:

    • Opioids, including beta-endorphin and morphine sulfate, modulate angiogenesis.
    • These findings suggest a role for beta-EP and MS in vascular endothelial cell proliferation.
    • The mechanism may involve interactions with cell-mediated immunity factors like interferons, interleukins, and prostaglandin E2.