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Published on: December 8, 2023
Strategies to Promote Long-Distance Optic Nerve Regeneration
Shu-Guang Yang1,2, Chang-Ping Li1, Xue-Qi Peng1
1State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
Abstract:
Mammalian retinal ganglion cells (RGCs) in the central nervous system (CNS) often die after optic nerve injury and surviving RGCs fail to regenerate their axons, eventually resulting in irreversible vision loss. Manipulation of a diverse group of genes can significantly boost optic nerve regeneration of mature RGCs by reactivating developmental-like growth programs or suppressing growth inhibitory pathways. By injury of the vision pathway near their brain targets, a few studies have shown that regenerated RGC axons could form functional synapses with targeted neurons but exhibited poor neural conduction or partial functional recovery. Therefore, the functional restoration of eye-to-brain pathways remains a greatly challenging issue. Here, we review recent advances in long-distance optic nerve regeneration and the subsequent reconnecting to central targets. By summarizing our current strategies for promoting functional recovery, we hope to provide potential insights into future exploration in vision reformation after neural injuries.
Insights
Optic nerve injury causes vision loss, but gene manipulation can promote retinal ganglion cell (RGC) axon regeneration. Functional recovery remains challenging, requiring further research into vision restoration strategies.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Ophthalmology
Background:
- Mammalian retinal ganglion cells (RGCs) in the central nervous system (CNS) often die after optic nerve injury, leading to irreversible vision loss.
- Surviving RGCs typically fail to regenerate their axons, hindering natural recovery processes.
Purpose of the Study:
- To review recent advances in promoting long-distance optic nerve regeneration.
- To explore strategies for functional reconnection of regenerated RGC axons to central targets.
- To provide insights into future vision reformation after neural injuries.
Main Methods:
- Review of studies involving genetic manipulation to enhance RGC axon regeneration.
- Analysis of approaches that reactivate developmental growth programs or suppress inhibitory pathways.
- Examination of research on functional synapse formation and recovery after optic nerve injury.
Main Results:
- Genetic manipulation can significantly boost optic nerve regeneration in mature RGCs.
- Regenerated RGC axons can form functional synapses but often show limited neural conduction or partial recovery.
- Functional restoration of eye-to-brain pathways post-injury remains a significant challenge.
Conclusions:
- Strategies combining genetic manipulation and targeted reconnection show promise for vision restoration.
- Overcoming poor neural conduction and achieving complete functional recovery are key areas for future research.
- Continued exploration is vital for advancing vision reformation techniques after neural damage.
