Genetically encoded calcium indicators are described as tools for real-time monitoring of neuronal dynamics in vivo.
First-pass extracted concept
genetically encoded calcium indicators
Candidate: concept label4 source documents10 linked claims
Live refresh every 5sNext refresh in 5s
Aliases
calcium indicators, GECIs
Extracted Explainers
What the tool is doing
GECIs are genetically encoded tools used to image calcium dynamics and neuronal activity in living tissues and designated cell types in vivo. The review frames them as a technology approaching maturity for physiology in living animals.
Genetically encoded calcium indicators are presented as a sensor class within zebrafish optogenetics for monitoring neuronal activity.
Resources required
Their use requires genetically encoded calcium indicators and in vivo monitoring of neuronal activity.
Use requires expression of the indicator in target cells or tissues, including interest in stable or conditional animal lines. Optical imaging capability is implied by the discussion of fluorescence emission properties.
They require transgene expression in defined neuronal populations and optical imaging capability.
What problem it solves
They help reveal functional connectivity within reconstructed graft-host circuits.
They enable cell-type-targetable calcium imaging in living systems. This addresses the need to monitor neuronal activity and calcium dynamics in vivo.
They provide a genetically encoded route to observe neural circuit activity in vivo.
What it does not solve
Evidence Snippets
The primary sources of signal degradation ... are systematically explored across four major indicator classes: voltage-sensitive dyes (VSDs), genetically encoded voltage indicators (GEVIs), calcium-sensitive dyes (CSDs), and genetically encoded calcium indicators (GECIs).
real-time monitoring of neuronal dynamics shedding light on functional connectivity within the reconstructed circuits by using genetically encoded (calcium) indicators in vivo
More than a decade ago genetically encoded calcium indicators (GECIs) entered the stage as new promising tools to image calcium dynamics and neuronal activity in living tissues and designated cell types in vivo.
optogenetic sensors (i.e., genetically encoded calcium indicators and voltage sensors)
Supporting Sources
Linked Claims
The review summarizes mitigation strategies for signal-quality limitations including hardware optimization, sensor choice, sample preparation, experimental design, post-processing, and computational correction methods.
The review classifies common mechanisms that compromise data quality into photon shot noise, device-related errors, and sample-related measurement errors.
Signal degradation in biological optical imaging of membrane voltage and calcium dynamics is organized in this review across four indicator classes: VSDs, GEVIs, CSDs, and GECIs.
The molecular toolbox reviewed holds promise for elucidating the impact of cell therapy on neural circuitry and guiding development of more effective treatments for neurological disorders.
Genetically encoded calcium indicators can be used in vivo for real-time monitoring of neuronal dynamics to reveal functional connectivity within reconstructed circuits.
The field still needs high-performance GECIs with more favorable red or infrared emission and new stably or conditionally GECI-expressing animal lines.
Important remaining GECI issues include indicator linearity, toxicity, and slow response kinetics.
Genetically encoded calcium indicators are promising tools for imaging calcium dynamics and neuronal activity in living tissues and designated cell types in vivo.
These improvements made GECIs a powerful means to perform physiology in living animals.
The review covers recent advances in optogenetic sensors including genetically encoded calcium indicators and voltage sensors, and actuators including light-activated ion channels and ion pumps.
Quoted textsource-backed
we describe some of the most recent advances in the development and applications of optogenetic sensors (i.e., genetically encoded calcium indicators and voltage sensors) and actuators (i.e., light activated ion channels and ion pumps).