Advanced zebrafish transgenesis with Tol2 and application for Cre/lox recombination experiments

Area of Science:

• Genetics and Molecular Biology
• Developmental Biology
• Transgenic Organisms

Background:

• Cre/lox recombination is vital for genetic research, particularly in mouse models.
• Zebrafish offer advantages for inducible gene expression due to ease of drug treatment.
• Tol2 transgenesis provides a stable platform for integrating lox-cassette transgenes.

Purpose of the Study:

• To outline Cre/lox methodology and its application in zebrafish.
• To detail Tol2 transgenesis for creating single-insertion transgenes.
• To present protocols for inducible CreER(T2) activation using 4-hydroxytamoxifen.

Main Methods:

• Cre/lox recombination principles and CreER(T2) activation by tamoxifen.
• Tol2-mediated zebrafish transgenesis for stable transgene integration.
• 4-hydroxytamoxifen induction for spatio-temporal transgene regulation.

Main Results:

• Demonstration of Tol2 transgenesis as a robust method for Cre/lox experiments in zebrafish.
• Establishment of protocols for inducible CreER(T2) activity in zebrafish embryos.
• Successful application of spatio-temporal transgene regulation.

Conclusions:

• Tol2 transgenesis combined with inducible CreER(T2) systems offers powerful spatio-temporal control of gene expression in zebrafish.
• This methodology enhances genetic research capabilities, including misexpression and lineage tracing.
• The described protocols facilitate precise genetic manipulation in zebrafish embryos.