Defining inhibitory neurone function in respiratory circuits: opportunities with optogenetics?

Area of Science:

• Neuroscience
• Respiratory Physiology
• Computational Biology

Background:

• Synaptic inhibition is vital for normal breathing, involving GABAergic and glycinergic neurons.
• The exact roles of these inhibitory neurons in respiratory microcircuits remain unclear.
• Key areas include the pre-Bötzinger (pre-BötC) and Bötzinger (BötC) complexes.

Purpose of the Study:

• To review the importance of synaptic inhibition in respiratory control.
• To discuss the limitations of pharmacological studies.
• To explore optogenetic strategies for investigating inhibitory circuits.

Main Methods:

• Review of existing pharmacological and mathematical modeling studies.
• Exploration of optogenetic techniques for circuit interrogation.
• Discussion of hypothetical optogenetic approaches.

Main Results:

• Classical pharmacological studies suggest critical roles for synaptic inhibition.
• Optogenetics presents a promising avenue for future research.
• Technical advances in optogenetics enable precise study of inhibitory neuron function.

Conclusions:

• Optogenetics can elucidate the function of specific inhibitory neuron subsets.
• Understanding inhibitory roles in the pre-BötC and BötC is essential for respiratory control.
• Future optogenetic applications will advance our knowledge of respiratory neurobiology.