Live imaging and analysis of postnatal mouse retinal development.

Area of Science:

• Developmental Biology
• Neuroscience
• Cell Biology

Background:

• The explanted rodent retina is a valuable model for studying retinal development and gene transfer.
• Key developmental processes like cell proliferation and migration are retained in explanted retinas.
• Previous live imaging studies were limited to non-mammalian or whole-mount mammalian samples.

Purpose of the Study:

• To develop and validate an in vitro live mouse retinal preparation for high-resolution imaging.
• To enable detailed analysis of retinal progenitor cell behavior and kinetics.
• To provide a robust platform for studying rodent retinal development.

Main Methods:

• Assembly and maintenance of a CO2-independent, in vitro mouse retinal culture.
• Utilizing upright and inverted microscopy (2-photon or confocal) for live imaging.
• Tracking of interkinetic nuclear migration and cell morphology changes in fluorescently labeled retinal cells.
• Hierarchical cluster screening for analyzing movement kinetics.

Main Results:

• High-quality, multi-channel imaging of retinal cells expressing fluorescent reporters for up to 48 hours.
• Successful tracking of interkinetic nuclear migration within individual cells.
• Identification and grouping of movement kinetics in experimental and control samples using various measures.

Conclusions:

• The developed in vitro system offers a robust method for studying rodent retinal development.
• This approach facilitates live imaging and detailed kinetic analysis of cellular processes.
• It enhances the ability to assess cell production kinetics in structurally intact retinal explants.