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Updated: Mar 9, 2026

A Method for High Fidelity Optogenetic Control of Individual Pyramidal Neurons In vivo
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Precision Optogenetic Tool for Selective Single- and Multiple-Cell Ablation in a Live Animal Model System.

Kalpana Makhijani1, Tsz-Leung To1, Rubén Ruiz-González2

  • 1Department of Pharmaceutical Chemistry, University of California - San Francisco, San Francisco, CA 94158, USA; Cardiovascular Research Institute, University of California - San Francisco, San Francisco, CA 94158, USA.

Cell Chemical Biology
|January 10, 2017
PubMed
Summary

Researchers developed mini singlet oxygen generator 2 (miniSOG2), an optogenetic tool for precise cell ablation. This advancement allows targeted cell killing in complex organisms like Drosophila melanogaster, aiding developmental studies.

Keywords:
Drosophilacell ablationdevelopmental biologyfluorescent proteinsneuronsoptogeneticsphotoreceptorphotosensitizerreactive oxyge specieswing

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Area of Science:

  • Developmental Biology
  • Optogenetics
  • Molecular Biology

Background:

  • Cell ablation is crucial for studying cell lineage and function during development.
  • Optogenetic methods offer precise control for cell ablation.
  • Previous work developed mini singlet oxygen generator (miniSOG) for Caenorhabditis elegans.

Purpose of the Study:

  • To generate an improved optogenetic tool, miniSOG2, for cell ablation.
  • To validate miniSOG2's efficacy in a complex model organism, Drosophila melanogaster.
  • To demonstrate miniSOG2's utility for studying developmental processes.

Main Methods:

  • Directed evolution was used to create miniSOG2.
  • miniSOG2 was applied to Drosophila melanogaster larvae.
  • Photogenerated reactive oxygen species were utilized for cell ablation.

Main Results:

  • miniSOG2 successfully photoablated a single neuron in Drosophila larvae.
  • Targeted ablation of cells in the wing imaginal disc resulted in developmental defects in adult wings.
  • miniSOG2 demonstrated precision in killing specific cells or small cell groups.

Conclusions:

  • miniSOG2 is an effective optogenetic tool for precision cell ablation in live animals.
  • This tool facilitates the study of cell origin, fate, and function.
  • miniSOG2 opens new avenues for research in tissue regeneration and developmental biology.