How Chloride Channels Affect Acid-Sensing Ion Channels in Neurons
Author Information
Author(s): Chen Xuanmao, Whissell Paul, Orser Beverley A., MacDonald John F.
Primary Institution: Department of Physiology, University of Toronto
Hypothesis
ASICs are regulated by chloride channels in CNS neurons.
Conclusion
GABAA receptors and glycine receptors modify ASICs in neurons through mechanisms that require the opening of chloride channels.
Supporting Evidence
- ASICs were reversibly inhibited by activation of GABAA receptors in murine hippocampal neurons.
- Activation of glycine receptors modified ASICs in spinal neurons.
- GABAA receptors and glycine receptors interact to regulate synaptic plasticity in CA1 hippocampal slices.
- Maximal inhibition of ASICs was caused by 30 µM GABA.
- Blockade of GABAA receptors enhanced long-term potentiation (LTP) at CA1 synapses.
Takeaway
This study shows that certain channels in the brain can change how other channels work, which is important for how our brain cells communicate.
Methodology
The study involved whole-cell voltage-clamp recordings in cultured primary spinal or hippocampal neurons and analyzed the effects of GABAA and glycine receptor activation on ASIC currents.
Limitations
The effects of GABA on ASICs may depend on specific neuronal subtypes.
Participant Demographics
Wild-type Swiss white mice and C57/BL6 mice were used for experiments.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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