Culture of Adult Transgenic Zebrafish Retinal Explants for Live-cell Imaging by Multiphoton Microscopy

Area of Science:

• Neuroscience
• Developmental Biology
• Regenerative Medicine

Background:

• Adult zebrafish Müller glia initiate retinal regeneration after injury.
• Müller glia dedifferentiate, proliferate, and generate new neurons.
• Interkinetic Nuclear Migration (INM) is crucial for progenitor cell positioning during retinal development and regeneration.

Purpose of the Study:

• To establish conditions for live-cell imaging of INM in adult zebrafish retinal explants.
• To monitor the migratory behavior of Müller glia and neuronal progenitor cells during regeneration.
• To enable detailed analysis of INM dynamics in a model of adult neuronal regeneration.

Main Methods:

• Isolation and culture of dorsal retinas from light-induced damaged Tg[gfap:nGFP]^mi2004 zebrafish.
• Live-cell imaging using multiphoton microscopy for up to 8 hours.
• Post-imaging analysis to quantify apical and basal INM velocities.

Main Results:

• Established viable retinal explant cultures for extended live imaging.
• Successfully monitored the migratory behavior of gfap:nGFP-positive cells within the retinal explant.
• Developed methods for analyzing INM dynamics in adult regenerating retinas.

Conclusions:

• Provided a robust method to study INM dynamics in adult zebrafish retinal regeneration.
• This model system will advance understanding of INM mechanisms controlling cell positioning.
• Facilitates future research into the regulation of neuronal regeneration.