NMDA NR2B Receptors and Morphine Tolerance
Author Information
Author(s): Ko Shanelle W, Wu Long-Jun, Shum Fanny, Quan Jessica, Zhuo Min
Primary Institution: University of Toronto
Hypothesis
Do NMDA NR2B receptors contribute to morphine-induced analgesic tolerance?
Conclusion
Inhibiting NMDA NR2B receptors can reduce the development of analgesic tolerance to morphine.
Supporting Evidence
- Ro 256981, an NMDA NR2B antagonist, was shown to reduce morphine tolerance.
- Significant increases in response latencies were observed in mice treated with Ro 256981.
- Chronic morphine treatment enhanced NMDA receptor responses in the anterior cingulate cortex.
Takeaway
This study shows that a specific part of the brain can help reduce the pain relief that morphine provides over time, and blocking it might help keep morphine effective.
Methodology
Mice were treated with morphine and an NMDA NR2B antagonist, and their pain responses were measured using hot-plate tests.
Potential Biases
Potential bias in the interpretation of results due to the use of a single animal model.
Limitations
The study primarily used male mice, which may not represent female responses.
Participant Demographics
Adult male C57Bl/6 mice, aged 8-10 weeks.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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