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Related Experiment Video

Updated: Mar 15, 2026

Mapping Inhibitory Neuronal Circuits by Laser Scanning Photostimulation
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"MAPseq"-uencing Long-Range Neuronal Projections.

Keisuke Yonehara1, Botond Roska2

  • 1Department of Biomedicine, Danish Research Institute of Translational Neuroscience-DANDRITE, Nordic EMBL Partnership for Molecular Medicine, Aarhus University, 8000 Aarhus C, Denmark.

Neuron
|September 10, 2016
PubMed
Summary

MAPseq technology barcodes individual neurons to trace their connections across the brain. This method enables the simultaneous mapping of long-range neuronal projections with single-cell resolution.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Understanding neuronal circuitry is crucial for deciphering brain function.
  • Existing methods for mapping neuronal projections often lack single-cell resolution or scalability.

Purpose of the Study:

  • To introduce and validate MAPseq (Multiplexed Analysis of Projection neurons) for mapping neuronal connections.
  • To enable the simultaneous tracing of long-range projections from numerous individual neurons.

Main Methods:

  • Individual neurons from a specific source brain region are tagged with unique mRNA barcodes.
  • These barcodes are subsequently sequenced in projection target regions.
  • Computational analysis links barcodes to their originating neurons.

Main Results:

  • MAPseq successfully tags individual neurons with distinct mRNA barcodes.
  • The method allows for the identification and mapping of long-range neuronal projections.
  • Single-cell resolution in mapping projection targets is achieved.

Conclusions:

  • MAPseq provides a powerful tool for high-throughput, single-cell resolution neuronal projection mapping.
  • This technique facilitates a deeper understanding of brain connectivity and neural circuit organization.