Electroacupuncture in conscious free-moving mice reduces pain by ameliorating peripheral and central nociceptive mechanisms

Ying Wang, Jianxun Lei, Mihir Gupta, Fei Peng, Sarah Lam, Ritu Jha, Ellis Raduenz, Al J Beitz, Kalpna Gupta

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Integrative approaches such as electroacupuncture, devoid of drug effects are gaining prominence for treating pain. Understanding the mechanisms of electroacupuncture induced analgesia would benefit chronic pain conditions such as sickle cell disease (SCD), for which patients may require opioid analgesics throughout life. Mouse models are instructive in developing a mechanistic understanding of pain, but the anesthesia/restraint required to administer electroacupuncture may alter the underlying mechanisms. To overcome these limitations, we developed a method to perform electroacupuncture in conscious, freely moving, unrestrained mice. Using this technique we demonstrate a significant analgesic effect in transgenic mouse models of SCD and cancer as well as complete Freund's adjuvant-induced pain. We demonstrate a comprehensive antinociceptive effect on mechanical, cold and deep tissue hyperalagesia in both genders. Interestingly, individual mice showed a variable response to electroacupuncture, categorized into high-, moderate-, and non-responders. Mechanistically, electroacupuncture significantly ameliorated inflammatory and nociceptive mediators both peripherally and centrally in sickle mice correlative to the antinociceptive response. Application of sub-optimal doses of morphine in electroacupuncture-treated moderate-responders produced equivalent antinociception as obtained in high-responders. Electroacupuncture in conscious freely moving mice offers an effective approach to develop a mechanism-based understanding of analgesia devoid of the influence of anesthetics or restraints.

Original languageEnglish (US)
Article number34493
JournalScientific reports
Volume6
DOIs
StatePublished - Sep 30 2016

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Electroacupuncture
Pain
Sickle Cell Anemia
Analgesia
Freund's Adjuvant
Chronic Pain
Morphine
Opioid Analgesics
Transgenic Mice
Analgesics
Anesthetics
Anesthesia

Cite this

Electroacupuncture in conscious free-moving mice reduces pain by ameliorating peripheral and central nociceptive mechanisms. / Wang, Ying; Lei, Jianxun; Gupta, Mihir; Peng, Fei; Lam, Sarah; Jha, Ritu; Raduenz, Ellis; Beitz, Al J; Gupta, Kalpna.

In: Scientific reports, Vol. 6, 34493, 30.09.2016.

Research output: Contribution to journalArticle

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