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Opioid receptors
Maria Waldhoer1, Selena E Bartlett, Jennifer L Whistler
1Ernest Gallo Clinic and Research Center, University of California, San Francisco, Emeryville, California 94608, USA. mariaw@egcrc.net
Annual Review of Biochemistry
|June 11, 2004
Summary
This review explores opioid receptors, which are G protein-coupled receptors (GPCRs). Understanding these receptors is key to addressing the mechanisms behind opioid tolerance and addiction.
Area of Science:
- Neuroscience
- Pharmacology
- Molecular Biology
Background:
- Opioid receptors are seven transmembrane-spanning G protein-coupled receptors (GPCRs).
- GPCRs are vital for mediating neurotransmitter and hormone actions.
- Opioid receptors are activated by endogenous peptides and exogenous opiates, including potent analgesics and drugs of abuse.
Purpose of the Study:
- To investigate the mechanisms underlying opioid tolerance and dependence.
- To provide insight into why exogenous opioids like morphine and heroin are highly addictive.
Main Methods:
- This review synthesizes existing research on opioid receptor function.
- Focuses on molecular and cellular mechanisms.
- Examines the relationship between receptor activation and downstream signaling pathways.
Main Results:
- Opioid receptor activation by exogenous compounds leads to complex cellular adaptations.
- These adaptations contribute to the development of tolerance and physical dependence.
- The addictive potential of opioids is linked to their interaction with reward pathways.
Conclusions:
- Further research into opioid receptor signaling is crucial for developing safer analgesics.
- Understanding these mechanisms can inform strategies for addiction treatment and prevention.
- Targeting specific aspects of opioid receptor modulation may mitigate adverse effects.