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Intracellular signal pathways controlling respiratory neurons
D W Richter1, P M Lalley, O Pierrefiche
1Department of Neurophysiology, University of Göttingen, Germany. dwr@neuro-physiol.med.uni-goettingen.de
Respiration Physiology
|January 4, 1998
Summary
Intracellular signaling pathways, including protein kinase A (PKA) and protein kinase C (PKC), modulate respiratory neuron activity. These pathways are crucial for regulating breathing patterns and have clinical implications for respiratory disorders.
Area of Science:
- Neuroscience
- Respiratory Physiology
- Cellular Signaling
Background:
- Medullary respiratory neurons control breathing.
- Neuromodulators influence these neurons, but intracellular pathways are poorly understood.
Purpose of the Study:
- To investigate the role of cyclic adenosine-triphosphate (cAMP)-dependent protein kinase (PKA) and protein kinase C (PKC) pathways in medullary respiratory neurons.
- To elucidate the effects of these pathways on ionic conductances and neuronal excitability.
Main Methods:
- Electrophysiological recordings in vivo in cats.
- Analysis of voltage- and ligand-controlled ionic conductances.
- Assessment of PKA and PKC pathway activation and function.
Main Results:
- PKA and PKC pathways are persistently activated in medullary respiratory neurons.
- PKA modulates potassium and chloride channels, while PKC affects potassium currents and synaptic currents.
- These pathways are functionally significant in regulating neuronal excitability.
Conclusions:
- PKA and PKC are key intracellular signaling pathways regulating medullary respiratory neuron function.
- Dysregulation or modulation of these pathways can impact breathing control.
- Successful treatment of apneustic breathing with a 5HT-1A agonist highlights the clinical relevance.