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Putting a finishing touch on GECIs.

Tobias Rose1, Pieter M Goltstein1, Ruben Portugues1

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Genetically encoded calcium indicators (GECIs) now image neuronal activity effectively. Future GECI development aims to improve linearity, kinetics, and red-shifted emissions for advanced in vivo physiology.

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Area of Science:

  • Neuroscience
  • Biotechnology
  • Molecular Imaging

Background:

  • Genetically encoded calcium indicators (GECIs) have revolutionized in vivo imaging of neuronal activity.
  • FRET-based sensors and GCaMP family sensors are leading prototypes for GECI development.

Purpose of the Study:

  • To review the advancements in GECI technology.
  • To identify remaining challenges and future directions for GECI optimization.

Main Methods:

  • Structural analysis, engineering, and screening of GECI prototypes.
  • Performance evaluation of FRET-based and GCaMP sensors.

Main Results:

  • Recent GECI generations have surpassed previous performance thresholds.
  • Key areas for improvement include indicator linearity, toxicity, and response kinetics.

Conclusions:

  • GECIs are powerful tools for in vivo physiology, but further optimization is needed.
  • Future goals include red/infrared emission sensors and improved animal models for GECI research.