Imaging of Brain Slices with a Genetically Encoded Voltage Indicator

Area of Science:

• Neuroscience
• Biophysics
• Optical Imaging

Background:

• Functional fluorescence microscopy offers a powerful tool for electrophysiological monitoring.
• Voltage-sensitive fluorescent proteins (VSFPs) enable optical recording of neuronal activity.
• Large-scale monitoring of neuronal excitation and inhibition is crucial for understanding brain function.

Purpose of the Study:

• To describe the necessary equipment and techniques for recording optical voltage signals from brain slices.
• To detail the application of VSFP Butterfly 1.2 for functional imaging of neuronal activity.
• To discuss the advantages and inherent challenges associated with voltage imaging.

Main Methods:

• Utilizing functional fluorescence microscopy on brain slices.
• Employing voltage-sensitive fluorescent proteins (VSFPs) as voltage indicators.
• Recording optical voltage signals from cells expressing VSFP Butterfly 1.2.

Main Results:

• Successful recording of functional optical voltage signals from brain slices.
• Demonstration of techniques for large-scale electrophysiological monitoring using VSFPs.
• Identification of key equipment and procedural requirements for voltage imaging.

Conclusions:

• Voltage imaging with VSFPs provides a scalable method for studying neuronal activity.
• The described methods facilitate robust electrophysiological monitoring in brain slice preparations.
• Understanding the advantages and challenges is key to optimizing voltage imaging applications.