Related Experiment Videos
Opioids: first lessons from knockout mice
1CNRS UPR 9050, ESBS Parc d'innovation Bld S. Brandt, Illkirch, France.
Abstract:
Opioid receptors of the mu-, delta- and kappa-subtypes mediate the potent analgesic and addictive actions of opioid drugs. They also regulate responses to pain, stress and emotions when activated by endogenous opioid peptides. Recently, mice lacking opioid receptors or opioid peptides have been produced by gene targeting, providing molecular tools to study opioid function in vivo. Observations on mutant mice have shed new light on the mode of action of opioids, opioid receptor heterogeneity and interactions, and the involvement of each component of the opioid system in mouse physiology. In this article, Brigitte L. Kieffer reviews the first reported studies and discusses their therapeutic implications.
Insights
Gene targeting in mice reveals the crucial roles of opioid receptors and peptides in pain, stress, and emotions. These studies illuminate opioid system functions and therapeutic potential.
Area of Science:
- Neuroscience
- Pharmacology
- Genetics
Background:
- Opioid receptors (mu, delta, kappa) are key mediators of opioid drug effects, including analgesia and addiction.
- Endogenous opioid peptides activate these receptors, influencing pain, stress, and emotional responses.
- Understanding the opioid system is vital for pain management and addiction treatment.
Purpose of the Study:
- To review recent studies utilizing gene-targeted mice to investigate opioid system function.
- To elucidate the in vivo roles of opioid receptors and peptides.
- To discuss the therapeutic implications of these findings.
Main Methods:
- Gene targeting to create knockout mice lacking specific opioid receptors or peptides.
- In vivo studies to observe physiological and behavioral responses in mutant mice.
- Analysis of opioid receptor heterogeneity, interactions, and system component involvement.
Main Results:
- Mutant mouse models provide powerful tools for dissecting opioid system functions.
- These studies have enhanced understanding of opioid receptor mechanisms and interactions.
- Insights gained into the physiological roles of each opioid system component.
Conclusions:
- Gene-targeted mouse models are instrumental in advancing our knowledge of the opioid system.
- The findings offer new perspectives on opioid receptor function and interactions.
- This research has significant implications for developing novel therapeutic strategies for pain and addiction.