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Pain modulation by curcumin and ascorbic acid in mice.

A Luca, Teodora Alexa, A Dondaş

    Revista Medico-Chirurgicala a Societatii De Medici Si Naturalisti Din Iasi
    |August 1, 2014
    PubMed
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    Curcumin effectively reduced pain perception in mice across multiple models. Ascorbic acid (AA) showed mixed results, sometimes increasing pain while also demonstrating analgesic effects in specific instances.

    Area of Science:

    • Pharmacology and Pain Research
    • Natural Product Chemistry
    • Neuroscience

    Background:

    • Pain modulation involves complex mechanisms, including redox signaling.
    • Ascorbic acid (AA) and curcumin are natural compounds with known redox properties.
    • Understanding the differential effects of these compounds on pain is crucial.

    Purpose of the Study:

    • To investigate and compare the effects of ascorbic acid (AA) and curcumin on various pain models in mice.
    • To evaluate the role of redox properties in mediating the analgesic or pro-nociceptive effects of these compounds.

    Main Methods:

    • 28 mice were divided into four groups: AA treatment, curcumin treatment, and two control groups.
    • AA was administered intraperitoneally (500 mg/kg) for 21 days.

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  • Curcumin was administered via gastric gavage (120 mg/kg) for 14 days.
  • Pain was assessed using oro-facial formalin, paw formalin, and visceral pain models 24 hours after the last dose.

    • Main Results:

    • Curcumin significantly reduced pain perception in oro-facial and paw formalin tests.
    • Ascorbic acid (AA) exacerbated visceral pain induced by acetic acid and oro-facial inflammatory pain.
    • AA also demonstrated analgesic effects on paw formalin-induced pain, particularly in the first phase.

    Conclusions:

    • Both curcumin and ascorbic acid (AA) can modulate pain perception through mechanisms beyond their antioxidant capacities.
    • The differential effects suggest that specific pain pathways and tissue antioxidant defenses influence compound efficacy.
    • Reactive oxygen species (ROS) play a significant role in pain modulation, with varying responses to antioxidant interventions.