Imaging Calcium Responses in GFP-tagged Neurons of Hypothalamic Mouse Brain Slices

Christian Schauer; Trese Leinders-Zufall

doi:10.3791/4213

Les réponses de calcium dans les neurones d'imagerie GFP-marqués de hypothalamiques tranches ...

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Neuroscience

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JoVE Journal Neuroscience

Imaging Calcium Responses in GFP-tagged Neurons of Hypothalamic Mouse Brain Slices

Les réponses de calcium dans les neurones d'imagerie GFP-marqués de hypothalamiques tranches de cerveau de souris

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09:14 min

August 24, 2012

DOI: 10.3791/4213-v

Christian Schauer¹, Trese Leinders-Zufall¹

¹Department of Physiology, School of Medicine,University of Saarland, Homburg, Germany

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Overview

This protocol outlines a method for monitoring calcium responses in GFP-tagged neurons within brain slices using a red fluorescent calcium indicator dye. The approach allows for spatial and temporal analysis of calcium signals in response to stimuli.

Key Study Components

Area of Science

Neuroscience
Cell Biology
Imaging Techniques

Background

Calcium signaling is crucial for neuronal function.
GFP-tagged neurons allow for specific visualization in brain tissue.
Red fluorescent dyes provide an alternative to green indicators.
Confocal microscopy enables high-resolution imaging of calcium dynamics.

Purpose of Study

To monitor stimulus-induced calcium responses in neurons.
To utilize a non-green fluorescent calcium indicator dye for better contrast.
To enhance multicolor imaging analysis of calcium signals.

Methods Used

Extraction of brain tissue from transgenic mice expressing GFP.
Preparation of brain slices using a microtome.
Application of calcium indicator dye loading solution to the slices.
Timestamp recording of fluorescent cells via confocal microscopy.

Main Results

Successful uptake of the calcium indicator dye by brain cells.
Visualization of calcium responses in GFP-tagged neurons.
Effective use of multicolor calcium imaging analysis.
Demonstration of spatial and temporal dynamics of calcium signaling.

Conclusions

This method provides a reliable approach to study calcium signaling in neurons.
Red fluorescent dyes can enhance imaging capabilities.
The protocol can be applied to various studies involving neuronal activity.

Frequently Asked Questions

What is the significance of using GFP-tagged neurons?

GFP-tagged neurons allow for specific visualization and tracking of neuronal activity in brain slices.

Why use a red fluorescent calcium indicator dye?

Red fluorescent dyes provide better contrast and can be used alongside green indicators for multicolor imaging.

What are the advantages of confocal microscopy in this study?

Confocal microscopy offers high-resolution imaging, allowing for detailed observation of calcium dynamics in neurons.

How does this protocol contribute to neuroscience research?

It enables researchers to monitor calcium signaling in real-time, enhancing our understanding of neuronal function.

Can this method be applied to other types of cells?

While this protocol is designed for neurons, similar techniques can be adapted for other cell types expressing GFP.

What are the potential applications of this imaging technique?

This technique can be used in studies of synaptic activity, neurodegenerative diseases, and drug effects on neuronal signaling.

Dans ce protocole, nous mettons à jour les progrès récents de l'imagerie Ca

L’objectif global de cette procédure est de surveiller les réponses calciques induites par un stimulus, à la fois dans les neurones marqués à la GFP, dans l’espace et temporellement dans les tranches de cerveau à l’aide d’un colorant indicateur de calcium fluorescent non vert. Ceci est accompli en extrayant d’abord le cerveau d’une souris transgénique exprimant la GFP dans des cellules spécifiques. La deuxième étape consiste à préparer des tranches de tissu à l’aide d’un microtome.

Ensuite, la solution de chargement du colorant indicateur de calcium est pipetée sur les tranches pour permettre au colorant d’être absorbé par les cellules cérébrales. La dernière étape consiste à effectuer un enregistrement horodaté des cellules fluorescentes à l’aide de la microscopie confocale. En fin de compte, les réponses calciques dans les neurones marqués à la GFP sont mises en évidence à l’aide d’une analyse d’imagerie calcique multicolore.

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