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[Electroacupuncture suppresses morphine--induced conditioned place preference (CPP) in rats].

Xiangdang Shi1, Fei Luo, Cailian Cui

  • 1Neuroscience Research Institute, Department of Neurobiology, Peking University School of Basic Medical Sciences, Beijing 100083, China.

Beijing Da Xue Xue Bao. Yi Xue Ban = Journal of Peking University. Health Sciences
|August 14, 2003
PubMed
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Electroacupuncture (EA) at 2 Hz or 100 Hz effectively reduced morphine-induced conditioned place preference (CPP) in rats. This study demonstrates EA

Area of Science:

  • Neuroscience
  • Pharmacology
  • Integrative Medicine

Background:

  • Opioid dependence remains a significant global health challenge.
  • Conditioned place preference (CPP) is a widely used animal model to study drug addiction.
  • Electroacupuncture (EA) is a therapeutic technique with potential applications in pain management and addiction.

Purpose of the Study:

  • To investigate the impact of different electroacupuncture (EA) frequencies on morphine-induced conditioned place preference (CPP) in rats.
  • To determine if EA can modulate the behavioral expression of opioid-associated learning and reward.

Main Methods:

  • Sprague-Dawley rats were trained in a three-chamber CPP apparatus to associate a specific compartment with morphine administration.
  • Following CPP training, rats received daily EA treatment at either 2 Hz or 100 Hz for three consecutive days.

Related Experiment Videos

  • Preference scores were assessed by measuring the time spent in the drug-paired compartment before and after EA treatment.

    • Main Results:

    • Morphine administration (4 mg/kg, i.p.) successfully established a significant conditioned place preference in rats.
    • Rats treated with EA at both 2 Hz and 100 Hz frequencies exhibited significantly reduced time spent in the morphine-paired compartment.
    • EA treatment effectively inhibited the expression of morphine-induced CPP.

    Conclusions:

    • A computer-controlled CPP system reliably established morphine-induced CPP in rats.
    • Repeated electroacupuncture (EA) sessions at 2 Hz or 100 Hz significantly suppressed the expression of morphine-induced conditioned place preference.
    • EA presents a potential non-pharmacological intervention for mitigating opioid reward and relapse behaviors.