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Updated: May 30, 2025
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Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution
Published on: September 5, 2012
11.8K
An improved FLARE system for recording and manipulating neuronal activity.
Guanwei Zhou1,2,3, Ruonan Li1,2,3, Ola Bartolik1,4
1Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.
Biorxiv : the Preprint Server for Biology
|January 27, 2025
Summary
Researchers developed cytoFLARE, a novel tool for precisely labeling and controlling neuronal activity in real-time. This improved system enhances the study of neural circuits underlying cognition and behavior in vivo.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- * Recording and manipulating neuronal ensembles in vivo is crucial for understanding cognition and behavior.
- * Existing tools like FLARE (Fluorescently Labeled Activated Reporter) have limitations in sensitivity to prolonged neuronal activity.
Purpose of the Study:
- * To develop an improved version of FLARE, named cytoFLARE, for enhanced neuronal activity reporting.
- * To characterize cytoFLARE's performance in cellular and in vivo models.
- * To demonstrate the application of cytoFLARE for precise temporal control of neuronal ensembles.
Main Methods:
- * Engineering cytoFLARE with cytosolic transcription factor expression and enhanced calcium-sensing domains.
- * Validating cytoFLARE in HEK293T cells and primary neuronal cultures.
- * Establishing cytoFLARE transgenic Drosophila models.
- * Applying cytoFLARE for time-gated neuronal labeling upon sensory or optogenetic stimulation.
- * Utilizing cytoFLARE to drive optogenetic actuator expression for neuronal reactivation.
Main Results:
- * cytoFLARE demonstrated improved calcium- and light-dependent signaling in HEK293T cells.
- * Higher signal-to-background ratios were observed in neuronal cultures compared to FLARE.
- * Successful time-gated labeling of activated neurons in Drosophila models.
- * Demonstrated reactivation of specific neurons in the larval nociceptive system using cytoFLARE.
Conclusions:
- * cytoFLARE represents a significant advancement over FLARE, offering enhanced sensitivity and precision.
- * This study presents the first characterization and application of time-gated calcium integrators in Drosophila.
- * cytoFLARE provides a powerful new tool for dissecting neural circuits and their functions.
