Hypotonicity modulates tetrodotoxin-sensitive sodium current in trigeminal ganglion neurons
2011
How Hypotonicity Affects Pain-Sensing Neurons
Sample size: 16
publication
Evidence: moderate
Author Information
Author(s): Li Lin, Liu Changjin, Chen Lei, Chen Ling
Primary Institution: Nanjing Medical University
Hypothesis
Hypotonic stimulation increases tetrodotoxin-sensitive sodium current in trigeminal ganglion neurons.
Conclusion
Hypotonic stimulation enhances tetrodotoxin-sensitive sodium current, contributing to pain sensation.
Supporting Evidence
- Hypotonic stimulation increased TTX-S current by 37.74 ± 2.12%.
- The voltage-dependent activation curve shifted to a more negative value in hypotonic conditions.
- TRPV4 receptor activation increased TTX-S current.
- PKC pathway inhibition reduced the hypotonicity-induced increase in TTX-S current.
Takeaway
When cells are in a less salty environment, they can send more pain signals. This study shows how that happens in certain nerve cells.
Methodology
The study measured sodium currents in cultured trigeminal ganglion neurons under isotonic and hypotonic conditions using patch clamp techniques.
Participant Demographics
Male Sprague-Dawley rats (180-200 g)
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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