Assaying activity-dependent arteriole and capillary responses in brain slices

Area of Science:

• Neuroscience
• Physiology
• Biomedical Engineering

Background:

• Neurovascular coupling (NVC) links neuronal activity to increased cerebral blood flow.
• Understanding NVC mechanisms is crucial for brain function and dysfunction.
• Current methods face challenges in isolating specific NVC components.

Purpose of the Study:

• To detail a protocol for simultaneously monitoring neuronal activity and vascular responses in acute brain slices.
• To investigate endogenous NVC mechanisms in a controlled experimental setting.

Main Methods:

• Development of an ex vivo assay for studying NVC in acute brain slices.
• Concurrent monitoring of stimulation-evoked neuronal activity and vascular responses.
• Facilitation of pharmacological manipulations and multimodal data acquisition.

Main Results:

• The ex vivo assay disentangles vascular segment-specific contractile responses to neuronal firing.
• It isolates NVC mechanisms from flow and pressure effects.
• The system allows for simplified pharmacological studies and integration with imaging techniques.

Conclusions:

• The ex vivo NVC assay enables detailed investigation of cellular and molecular NVC mechanisms.
• This method serves as a valuable complement to in vivo imaging approaches.
• It will advance the understanding of brain function and disease.