Enhanced group II mGluR-mediated inhibition of pain-related synaptic plasticity in the amygdala
2006
Inhibition of Pain-Related Synaptic Plasticity in the Amygdala
Sample size: 22
publication
Evidence: high
Author Information
Author(s): Han Jeong S, Fu Yu, Bird Gary C, Neugebauer Volker
Primary Institution: The University of Texas Medical Branch
Hypothesis
What is the role of group II mGluRs in pain-related synaptic plasticity in the amygdala?
Conclusion
Group II mGluRs inhibit synaptic plasticity in the amygdala more potently in a model of arthritis pain than in normal conditions.
Supporting Evidence
- A selective group II mGluR agonist (LY354740) decreased the amplitude of EPSCs more potently in CeLC neurons from arthritic rats than in control animals.
- The inhibitory effect of LY354740 was reversed by a group II mGluR antagonist (EGLU).
- LY354740 decreased frequency, but not amplitude, of miniature EPSCs in the presence of TTX.
- LY354740 had no significant effect on neuronal excitability measures.
Takeaway
This study found that a specific receptor in the brain can help reduce pain-related changes in how brain cells communicate, especially when there's arthritis.
Methodology
Whole-cell current- and voltage-clamp recordings were made from CeLC neurons in brain slices from control and arthritic rats.
Participant Demographics
Male Sprague Dawley rats (90 g–190 g; mean 130 g)
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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