Characterization of mesonephric development and regeneration using transgenic zebrafish

Area of Science:

• Comparative anatomy and physiology
• Developmental biology
• Regenerative medicine

Background:

• Zebrafish are a key vertebrate model for kidney research.
• Previous studies focused on the simpler pronephros, limiting complex kidney studies.
• The adult zebrafish mesonephros offers a more complex model for kidney development and regeneration.

Purpose of the Study:

• To investigate mesonephros development and post-injury regeneration in adult zebrafish.
• To characterize mesonephrogenesis and identify markers for renal progenitor cells.
• To evaluate the zebrafish mesonephros as a model for complex kidney studies.

Main Methods:

• Utilized transgenic zebrafish lines (wt1b::GFP and pod::NTR-mCherry).
• Characterized developmental stages and temporal-spatial patterns of mesonephrogenesis.
• Induced renal injury using gentamicin and monitored regeneration.

Main Results:

• Mesonephrogenesis occurs throughout zebrafish life, correlating linearly with body mass.
• The adult zebrafish mesonephros regenerates via neonephrogenesis after injury.
• wt1b expression marks early renal progenitor cells during regeneration.

Conclusions:

• The adult zebrafish mesonephros is a suitable model for studying kidney development and regeneration.
• Neonephrogenesis in zebrafish provides a synchronous model for studying nephron development.
• wt1b is a potential early marker for fated renal progenitor cells in kidney regeneration.