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Viral Tracing of Genetically Defined Neural Circuitry

Viral Tracing of Genetically Defined Neural Circuitry

Published on: October 17, 2012

Axonal and subcellular labelling using modified rabies viral vectors.

Ian R Wickersham¹, Heather A Sullivan, H Sebastian Seung

¹Department of Brain & Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, Massachusetts 02139, USA.

Nature Communications

|August 16, 2013

Summary

This summary is machine-generated.

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Deletion-mutant rabies virus enables bright, simultaneous labeling of neural circuits. This new viral vector overcomes limitations of adeno-associated viruses for studying neural connectivity and synaptic organization.

Area of Science:

Neuroscience
Molecular Biology
Genetics

Background:

Accurate mapping of neural circuits requires precise visualization of synaptic connections at various scales.
Current viral vectors, like adeno-associated viruses, have limitations in expressing multiple transgenes, hindering detailed synaptic analysis and combinatorial experiments.
Adeno-associated viruses exhibit slow expression, limiting their use in retrograde and transsynaptic tracing methods.

Purpose of the Study:

To develop a novel viral vector system for enhanced neural circuit tracing and synaptic manipulation.
To overcome the limitations of existing viral vectors in expressing multiple transgenes for comprehensive neural circuit analysis.
To enable simultaneous labeling of diverse neural components and their connections.

Main Methods:

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Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Published on: September 14, 2015

Related Experiment Videos

Last Updated: May 8, 2026

Viral Tracing of Genetically Defined Neural Circuitry

Viral Tracing of Genetically Defined Neural Circuitry

Published on: October 17, 2012

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling

Published on: September 14, 2015

Utilized a deletion-mutant rabies virus engineered for targeted cell localization.
Co-expressed multiple transgenes within the deletion-mutant rabies virus vector.
Demonstrated simultaneous labeling of axons and presynaptic terminals.
Showcased labeling of dendrites and postsynaptic densities.
Applied co-injection of vectors for simultaneous input and output pathway labeling.

Main Results:

Deletion-mutant rabies virus achieved bright axonal labeling, even with co-expression of two additional transgenes.
Successfully demonstrated simultaneous labeling of axons and presynaptic terminals.
Enabled visualization of both dendrites and postsynaptic densities.
Facilitated simultaneous labeling of neural inputs and outputs within a specific region.

Conclusions:

Deletion-mutant rabies virus offers a powerful new tool for neural circuit research, surpassing current adeno-associated virus capabilities.
This vector enables unprecedented combinatorial experiments for dissecting neural connectivity and synaptic function.
The enhanced labeling and manipulation capabilities open new avenues for understanding brain circuitry.