Light-Induced GFP Expression in Zebrafish Embryos using the Optogenetic TAEL/C120 System

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• Inducible gene expression systems are crucial for biological research.
• Optogenetics offers precise control over gene expression using light.
• Existing systems may lack efficiency or ease of use.

Purpose of the Study:

• To develop and validate a novel light-inducible gene expression system in zebrafish embryos.
• To demonstrate precise temporal and amplitude control of gene expression via optogenetics.
• To establish a versatile tool for studying biological processes in vivo.

Main Methods:

• Utilized an engineered transcription factor (TAEL) activated by blue light.
• Employed transgenic zebrafish expressing TAEL and a reporter gene (GFP) under a light-responsive promoter (C120).
• Applied blue light stimulation using an LED panel for gene induction.

Main Results:

• Achieved light-inducible GFP expression detectable within 30 minutes of blue light exposure.
• Demonstrated over 130-fold induction of reporter gene expression after 3 hours of light treatment.
• Validated expression levels using quantitative real-time PCR (qRT-PCR) and fluorescence microscopy.

Conclusions:

• The TAEL-based optogenetic system provides a versatile and user-friendly method for light-inducible gene expression in zebrafish.
• This system allows for rapid and robust control over gene expression, facilitating biological studies.
• The developed protocol is suitable for various applications in developmental and molecular biology research.