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Reliably Engineering and Controlling Stable Optogenetic Gene Circuits in Mammalian Cells
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OPTO-BLUE: An Integrated Bidirectional Optogenetic Lentiviral Platform for Controlled Light-Induced Gene Expression.

Duxan Arancibia1, Iracy Pol1, Martín Vargas-Fernández1

  • 1Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta 1240000, Chile.

International Journal of Molecular Sciences
|June 10, 2023
PubMed
Summary

The new OPTO-BLUE system uses blue light to control gene expression, offering precise temporal and spatial regulation for research and biomedicine. This optimized optogenetic tool enhances control over transgene expression with light intensity.

Keywords:
GAVPObidirectionalgene-regulated expressionlentivirusoptogenetic

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Area of Science:

  • Optogenetics
  • Molecular Biology
  • Gene Regulation

Background:

  • Regulated transgene expression systems are crucial for research and biomedicine.
  • Optogenetics offers enhanced spatial and temporal control over gene expression.
  • The LightOn system utilizes blue light to control transgene expression via a photosensitive protein.

Purpose of the Study:

  • To optimize and consolidate the LightOn optogenetic system into a single lentiviral plasmid, named OPTO-BLUE.
  • To validate the functionality of the OPTO-BLUE system for light-controlled gene expression.
  • To assess the efficiency of the system in controlling reporter gene expression.

Main Methods:

  • Assembled all components of the LightOn system into a single lentiviral plasmid (OPTO-BLUE).
  • Used enhanced green fluorescent protein (EGFP) as a reporter gene (OPTO-BLUE-EGFP).
  • Validated system efficiency through transfection and transduction in HEK293-T cells under blue light illumination.

Main Results:

  • Demonstrated light-controlled expression of EGFP using the OPTO-BLUE system.
  • Confirmed that expression levels correlate with specific light intensity and duration.
  • Successfully validated the system's functionality in mammalian cells.

Conclusions:

  • The optimized OPTO-BLUE system provides precise blue light-mediated control over transgene expression.
  • This system serves as a valuable molecular tool for modulating gene expression with temporal and intensity control.
  • OPTO-BLUE is a promising platform for applications in basic research and biomedicine.