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Preparing Fresh Retinal Slices from Adult Zebrafish for Ex Vivo Imaging Experiments
Published on: May 9, 2018
A zebrafish retinal graded photochemical stress model
Joseph W Eichenbaum1, Ayca Cinaroglu, Kenneth D Eichenbaum
1Department of Ophthalmology, Mount Sinai School of Medicine, USA. Joseph.Eichenbaum@mssm.edu
Journal of Pharmacological and Toxicological Methods
|March 10, 2009
Summary
This study developed a zebrafish model to investigate retinal degeneration, revealing how photochemical stress and an NMDA inhibitor impact retinal cells and gene expression, aiding understanding of age-related macular degeneration.
Area of Science:
- Ophthalmology
- Neuroscience
- Genetics
Background:
- Developing models for retinal degeneration is crucial for understanding its genetic basis.
- Zebrafish (Danio rerio) offer a valuable model for studying retinal stress responses.
- Photochemical stress and NMDA receptor pathways are implicated in retinal pathologies.
Purpose of the Study:
- To establish a graded photochemical stress model in adult zebrafish retina.
- To investigate the role of the NMDA inhibitor thiokynurenate in this model.
- To analyze the resulting phenotypic and genetic changes.
Main Methods:
- Intravitreal injection of rose bengal followed by controlled light exposure.
- Histologic and electron microscopic analysis of retinal layers.
- Gene expression analysis to identify molecular changes.
Main Results:
- Photochemical stress induced graded changes in photoreceptor, nuclear, and ganglion cell layers.
- Increased vacuolation in the inner plexiform layer was observed.
- Thiokynurenate treatment resulted in a distinct lesion pattern and altered gene expression.
Conclusions:
- The zebrafish model effectively replicates key aspects of retinal oxidative and cellular stress.
- Observed phenotypic and genetic changes provide insights into retinal degeneration.
- This model can advance the understanding of aging and macular degeneration pathologies.
