Protocol for tissue-specific mutagenesis with fluorescent labeling in zebrafish

Area of Science:

• Genetics and Genomics
• Developmental Biology
• Zebrafish Models

Background:

• Understanding gene function often requires targeted gene knockout.
• Generating tissue-specific mutations is crucial for studying genes with complex roles in development and disease.
• Zebrafish are a powerful model organism for genetic studies due to their rapid development and optical transparency.

Purpose of the Study:

• To present a novel protocol for generating stable, tissue-specific mutagenesis in zebrafish.
• To enable the analysis of mosaic loss-of-function phenotypes in a targeted manner.
• To provide a detailed method for creating and characterizing tissue-specific knockout zebrafish lines.

Main Methods:

• Development of a Tol2 transposase donor vector with a U6 promoter for single-guide RNA (sgRNA) and Cas9 expression.
• Utilizing a tissue-specific promoter to drive Cas9 and sgRNA transcription.
• Establishment, identification, and phenotypic analysis of stable, tissue-specific mutagenesis zebrafish lines.

Main Results:

• Successful generation of a protocol for tissue-specific mutagenesis in zebrafish.
• Demonstration of the ability to create stable zebrafish lines with targeted gene knockouts.
• Validation of the protocol for analyzing mosaic loss-of-function phenotypes.

Conclusions:

• The presented protocol offers a robust method for generating tissue-specific knockout zebrafish.
• This technique is valuable for dissecting gene function in a spatially and temporally controlled manner.
• The protocol facilitates the study of complex genetic interactions and developmental processes in zebrafish.