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A Conditioned Place Preference Protocol for Measuring Incubation of Craving in Rats
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[Establishment of tree shrew chronic morphine dependent model].

Yong-Mei Sun1, Jian-Zhen Yang, Hua-Ying Sun

  • 1Chinese Academy of Sciences, Kunming, China.

Dong Wu Xue Yan Jiu = Zoological Research
|February 21, 2012
PubMed
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Researchers developed morphine tolerance and dependence in tree shrews using escalating doses. This model helps study withdrawal symptoms and find new medications to reduce them.

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Area of Science:

  • Pharmacology
  • Neuroscience
  • Animal Models

Context:

  • Clinical morphine use is limited by tolerance, dependence, and addiction.
  • Developing effective treatments for opioid use disorder is a significant challenge.

Purpose:

  • To establish a tree shrew model for studying chronic morphine dependence and withdrawal.
  • To provide a preclinical tool for evaluating potential medications for managing opioid withdrawal symptoms.

Summary:

  • Tree shrews (Tupaia belangeri chinensis) were administered escalating doses of morphine over seven days, successfully inducing tolerance and dependence.
  • Morphine dependence was confirmed by naloxone-induced conditioned place aversion and observable withdrawal symptoms.
  • This study validates the tree shrew as a suitable animal model for investigating morphine withdrawal.

Impact:

  • Provides a novel animal model for preclinical research into opioid dependence and withdrawal.
  • Facilitates the screening and development of novel therapeutic agents to mitigate morphine withdrawal symptoms.
  • Contributes to a better understanding of the neurobiological mechanisms underlying opioid tolerance and dependence.