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Optogenetic Signaling Activation in Zebrafish Embryos.

Allison J Saul1, Catherine E Rogers1, Marcial Garmendia-Cedillos2

  • 1Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH.

Journal of Visualized Experiments : Jove
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Summary
This summary is machine-generated.

Optogenetic tools offer precise control over cellular signaling pathways. This study provides a protocol for using light-activated Bone Morphogenetic Protein (BMP) and Nodal signaling activators in zebrafish embryos for developmental studies.

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Optogenetics

Background:

  • Signaling pathways are crucial for biological processes like development and disease.
  • Experimental manipulation of signaling pathways requires precise spatiotemporal control.
  • Optogenetic tools offer reversible and tunable control over signaling pathway activity.

Purpose of the Study:

  • To provide practical guidelines for using LOV-based optogenetic tools (bOpto-BMP and bOpto-Nodal) in early zebrafish embryos.
  • To establish a pipeline for optogenetic manipulation of signaling in vivo.
  • To investigate the roles of signaling in development, health, and physiology.

Main Methods:

  • Utilized blue light-responsive light-oxygen-voltage (LOV) domains coupled with signaling effectors.
  • Applied bOpto-BMP and bOpto-Nodal activators in optically accessible early zebrafish embryos.
  • Described two control experiments: a quick phenotype assay and an immunofluorescence assay.

Main Results:

  • Established practical guidelines for optogenetic tool application in zebrafish embryos.
  • Demonstrated the utility of phenotype and immunofluorescence assays for optimizing experimental conditions and assessing signaling.
  • Provided a framework for investigating signaling roles using optogenetics.

Conclusions:

  • Optogenetic tools, specifically LOV-based activators, enable precise control over BMP and Nodal signaling in early zebrafish development.
  • The described control experiments facilitate the establishment of robust optogenetic experimental pipelines.
  • This approach offers a powerful platform for studying signaling in development and disease.