CGRP's Role in Pain-Related Changes in Spinal Neurons
Author Information
Author(s): Gary C Bird, Jeong S Han, Yu Fu, Hita Adwanikar, William D Willis, Volker Neugebauer
Primary Institution: The University of Texas Medical Branch
Hypothesis
What is the role of calcitonin gene-related peptide (CGRP) in synaptic plasticity in spinal dorsal horn neurons during arthritic pain?
Conclusion
CGRP facilitates synaptic transmission and increases neuronal excitability in spinal dorsal horn neurons in a model of arthritic pain.
Supporting Evidence
- CGRP increased synaptic transmission in spinal dorsal horn neurons from arthritic rats.
- A CGRP receptor antagonist reversed synaptic plasticity in neurons from arthritic rats.
- Neurons from arthritic rats showed increased excitability compared to control neurons.
Takeaway
This study shows that a molecule called CGRP makes nerve cells in the spinal cord more active and helps them send pain signals when there is arthritis.
Methodology
Whole-cell current- and voltage-clamp recordings were made from substantia gelatinosa neurons in spinal cord slices from control and arthritic rats.
Limitations
The study does not confirm the exact conduction velocity of afferents due to the method of stimulation.
Participant Demographics
Male Sprague Dawley rats aged 16-21 days.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website