Abstract
Neurodegenerative diseases and central nervous system (CNS) injuries are frequently characterized by axonal damage, as well as dendritic pathology. In contrast to mammals, adult zebrafish show a robust regeneration capacity after CNS injury and form the ideal model organism to further unravel the underlying mechanisms for both axonal and dendritic regrowth upon CNS damage. Here, we first describe an optic nerve crush injury model in adult zebrafish, an injury paradigm that inflicts de- and regeneration of the axons of retinal ganglion cells (RGCs), but also triggers RGC dendrite disintegration and subsequent recovery in a stereotyped and timed process. Next, we outline protocols for quantifying axonal regeneration and synaptic recovery in the brain, using retro- and anterograde tracing experiments and an immunofluorescent staining for presynaptic compartments, respectively. Finally, methods to analyze RGC dendrite retraction and subsequent regrowth in the retina are delineated, using morphological measurements and immunofluorescent staining for dendritic and synaptic markers.
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Acknowledgments
We thank present and former lab members of the Neural Circuit Development and Regeneration (NCDR) group, especially the ones forming the zebrafish research team, who have helped to develop these techniques over the years. This work was financially supported by fellowships and project grants from the Research Foundation-Flanders (FWO), FWO Flanders-Quebec bilateral research grant, the KU Leuven Research Council, and L’Oréal/UNESCO (For Women in Science).
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Beckers, A., Bergmans, S., Van Dyck, A., Moons, L. (2023). Analysis of Axonal Regrowth and Dendritic Remodeling After Optic Nerve Crush in Adult Zebrafish. In: Udvadia, A.J., Antczak, J.B. (eds) Axon Regeneration. Methods in Molecular Biology, vol 2636. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3012-9_9
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DOI: https://doi.org/10.1007/978-1-0716-3012-9_9
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