A Chemically Inducible Muscle Ablation System for the Zebrafish

Area of Science:

• Developmental biology
• Zebrafish models
• Regenerative medicine

Background:

• The nitroreductase (NTR)/metronidazole (MTZ) system enables targeted cell ablation.
• Tissue-specific expression of NTR is crucial for effective ablation.
• Many tissues lack established transgenic lines for NTR-mediated ablation.

Purpose of the Study:

• To develop a transgenic zebrafish line for skeletal muscle-specific ablation.
• To utilize the NTR/MTZ system for studying muscle biology.
• To establish a tool for monitoring muscle regeneration.

Main Methods:

• Generation of a transgenic zebrafish line expressing NTR in skeletal muscle.
• Treatment of zebrafish embryos with metronidazole (MTZ) to induce cell death.
• Observation of muscle-specific cell ablation and monitoring of muscle regeneration.

Main Results:

• Successful generation of a zebrafish line with NTR expression in differentiated skeletal muscle.
• MTZ treatment resulted in specific ablation of skeletal muscle cells in embryos.
• The developed line effectively monitored muscle regeneration in whole embryos and transplanted cells.

Conclusions:

• A novel transgenic zebrafish line enables targeted ablation of skeletal muscle.
• This model serves as a valuable tool for investigating muscle regeneration and development.
• The NTR/MTZ system in this zebrafish line advances research in regenerative biology.