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New therapies for optic neuropathies: development in experimental models
1University of Florida College of Medicine, Box 100284 Gainesville 32610-0284, Florida, USA. johnguy@eye1.eye.ufl.edu
Abstract:
Experimental models of human diseases have affected the design and direction of both basic and clinical research into understanding the pathogenesis and treatments of demyelinating disease, stroke, and hereditary disorders of the central nervous system. However, in spite of major advances in molecular research that have linked Leber Hereditary Optic Neuropathy to mutations in mitochondrial DNA, there has been relatively little focus in applying basic scientific methodologies to optic neuropathies other than glaucoma. The relative absence of detailed scientific knowledge about the basic mechanisms involved in the pathogenesis of optic nerve injury has contributed to the use of empiric therapies for neuro-ophthalmic optic neuropathies. Over the past decade major clinical trials, such as the Optic Neuritis Treatment Trial and Ischemic Optic Neuropathy Decompression Trial, have proven that currently available treatment options for demyelinating and ischemic optic neuropathies are ineffective and can even be harmful. Although the pathogenesis of visual failure in demyelinating, ischemic, and hereditary optic neuropathies appears diverse, a final common pathway for irreparable optic nerve injury may exist. This article reviews several models of experimental optic neuropathies that may aid in the development of novel treatments for neuro-ophthalmic disorders of the optic nerve during the 21st century.
Insights
Experimental optic neuropathy models are crucial for understanding optic nerve injury. This review explores models to develop new treatments for neuro-ophthalmic disorders, addressing limitations in current therapies.
Area of Science:
- Neuroscience
- Ophthalmology
- Genetics
Background:
- Experimental models are vital for studying diseases like demyelinating disease, stroke, and hereditary central nervous system disorders.
- Despite advances linking Leber Hereditary Optic Neuropathy to mitochondrial DNA mutations, research on optic neuropathies beyond glaucoma remains limited.
- A lack of understanding of optic nerve injury mechanisms leads to empirical treatments for neuro-ophthalmic conditions.
Purpose of the Study:
- To review experimental models of optic neuropathies.
- To highlight the potential of these models in developing novel treatments for optic nerve disorders.
- To address the need for better therapeutic strategies beyond current ineffective options.
Main Methods:
- Review of existing literature on experimental models of optic neuropathies.
- Analysis of established clinical trials (e.g., Optic Neuritis Treatment Trial, Ischemic Optic Neuropathy Decompression Trial).
- Discussion of potential common pathways in optic nerve injury pathogenesis.
Main Results:
- Current treatments for demyelinating and ischemic optic neuropathies are largely ineffective or harmful.
- Diverse optic neuropathies may share a final common pathway for irreversible optic nerve damage.
- Experimental models offer a promising avenue for future research.
Conclusions:
- Novel experimental models are essential for advancing the understanding and treatment of optic neuropathies.
- Developing targeted therapies based on experimental models could overcome limitations of current empirical treatments.
- Further research into experimental optic neuropathies is critical for 21st-century neuro-ophthalmic care.