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Genetically engineered fluorescent voltage reporters.

Hiroki Mutoh1, Walther Akemann, Thomas Knöpfel

  • 1Knöpfel lab for Neuronal Circuit Dynamics, RIKEN Brain Science Institute , 2-1 Hirosawa, Wako City, Saitama, 351-0198 Japan.

ACS Chemical Neuroscience
|August 17, 2012
PubMed
Summary
This summary is machine-generated.

Genetically encoded voltage indicators (GEVIs) offer advanced optical imaging of neuronal activity in the brain, overcoming limitations of older voltage-sensitive dyes for neuroscience research.

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Area of Science:

  • Neuroscience
  • Biophysics
  • Molecular Biology

Background:

  • Fluorescent membrane voltage indicators are crucial for optical imaging of neuronal circuits in living mammalian brains.
  • Classical voltage-sensitive dyes, while widely used, suffer from optical noise and limited cell-specific staining.
  • Long-term imaging experiments are challenging with traditional dyes due to staining and stability issues.

Purpose of the Study:

  • To critically review the fundamental concepts behind genetically encoded voltage indicators (GEVIs).
  • To survey the variety of available GEVI probes and assess their current developmental status.
  • To highlight how GEVIs overcome limitations of classical voltage-sensitive dyes.

Main Methods:

  • Review of fundamental concepts of genetically encoded voltage indicators.
  • Analysis of the diversity and development state of current GEVI probes.
  • Comparison of GEVI capabilities against classical voltage-sensitive dyes.

Main Results:

  • GEVIs provide a powerful alternative to classical voltage-sensitive dyes for neuronal imaging.
  • GEVIs address key limitations including optical noise and cell-specific targeting.
  • The review details the principles, probe variety, and developmental progress of GEVIs.

Conclusions:

  • Genetically encoded voltage indicators represent a significant advancement in optical imaging of neuronal activity.
  • GEVIs offer improved performance and versatility for neuroscience research compared to traditional dyes.
  • Further development of GEVIs promises enhanced capabilities for studying brain function.