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Related Experiment Video

Updated: Feb 18, 2026

Reliably Engineering and Controlling Stable Optogenetic Gene Circuits in Mammalian Cells
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Temporally precise single-cell-resolution optogenetics.

Or A Shemesh1,2,3,4,5, Dimitrii Tanese6, Valeria Zampini6,7

  • 1Media Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA.

Nature Neuroscience
|November 30, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a new tool for precisely controlling individual neurons in the brain. This method uses a specialized opsin (soCoChR) and holographic light to map neural circuit connections with high accuracy.

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Area of Science:

  • Neuroscience
  • Optogenetics
  • Molecular Biology

Background:

  • Optogenetic control of individual neurons is crucial for understanding neural circuit function.
  • High temporal precision is needed to accurately simulate neural codes within mammalian brain circuitry.

Purpose of the Study:

  • To develop a method for precise, high-temporal-resolution optogenetic control of individual neurons in intact mammalian brain circuits.
  • To enable simultaneous illumination of many neurons for network exploration.

Main Methods:

  • Designed a high-efficacy, soma-targeted opsin by fusing KA2 to CoChR (soCoChR).
  • Utilized two-photon computer-generated holography for precise light sculpting.
  • Applied soCoChR and holographic stimulation in mouse cortical brain slices.

Main Results:

  • soCoChR restricted opsin expression primarily to the cell body of mammalian cortical neurons.
  • Achieved photostimulation of individual cells with single-cell resolution and <1-ms temporal precision.
  • Successfully performed connectivity mapping on intact cortical circuits using soCoChR.

Conclusions:

  • Somatic CoChR (soCoChR) combined with two-photon holographic stimulation provides a powerful tool for optogenetic control of neural circuits.
  • This technique enables precise, high-temporal-resolution interrogation of neuronal connectivity in intact brain tissue.