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Diclofenac increases beta-endorphin plasma concentrations.

A Martini, G P Bondiolotti, P Sacerdote

    The Journal of International Medical Research
    |January 1, 1984
    PubMed
    Summary
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    Diclofenac treatment increased plasma Beta-endorphin levels, suggesting its role in pain relief. Cerebrospinal fluid (CSF) levels of Beta-endorphin and other metabolites remained unchanged, indicating localized effects.

    Area of Science:

    • Neuroscience
    • Pharmacology
    • Biochemistry

    Background:

    • Beta-endorphin is an endogenous opioid peptide involved in pain modulation.
    • Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) with known analgesic properties.
    • The precise mechanism of diclofenac's analgesia, particularly its interaction with the endogenous opioid system, requires further elucidation.

    Purpose of the Study:

    • To investigate the effect of diclofenac administration on Beta-endorphin concentrations in plasma and cerebrospinal fluid (CSF).
    • To examine the impact of diclofenac on ventricular CSF levels of serotonin and catecholamine metabolites.
    • To explore the potential role of Beta-endorphin in the analgesic mechanism of diclofenac.

    Main Methods:

    • Patients with ventricular shunts were administered diclofenac or a placebo.

    Related Experiment Videos

  • Plasma and ventricular CSF samples were collected before and after administration.
  • Beta-endorphin concentrations were measured using chromatographic separation.
  • Ventricular CSF levels of 5-hydroxyindole-acetic acid (5-HIAA), homovanillic acid (HVA), and MOPEG were also quantified.

    • Main Results:

    • Plasma Beta-endorphin concentrations significantly increased following diclofenac administration.
    • No significant changes in ventricular CSF Beta-endorphin levels were observed after diclofenac.
    • Placebo administration did not affect Beta-endorphin levels in either plasma or CSF.
    • Ventricular CSF concentrations of 5-HIAA, HVA, and MOPEG remained unchanged.

    Conclusions:

    • Diclofenac administration leads to a significant increase in peripheral Beta-endorphin levels.
    • The findings suggest that Beta-endorphin may play a role in the analgesic effects of diclofenac.
    • Diclofenac does not appear to alter central levels of Beta-endorphin or key monoamine metabolites in the ventricular CSF.