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Published on: March 16, 2022
Gene therapy for ocular neovascularization
1The Departments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21287-9277, USA. pcampo@jhmi.edu
Abstract:
Ocular neovascularization is a major cause of blindness and visual disability in developed countries. There has been considerable recent progress identifying molecular signals that participate in ocular neovascularization and it appears that imbalances between stimulatory and inhibitory proteins contribute. Re-establishing balance by ocular gene transfer to block stimulators or increase expression of endogenous inhibitors is an appealing therapeutic approach, because it provides a potential means to achieve sustained intraocular effects with little impact on the rest of the body. Proof-of-concept has been provided in animal models using several vector systems and several transgenes and completion of a phase I study testing intraocular injection of an adenoviral vector expressing pigment epithelium-derived factor is an important milestone that will help to accelerate future progress. It is likely that additional vectors and transgenes will enter clinical trials in the near future. This report discusses the rationale and experimental evidence regarding several candidate transgenes.
Insights
Gene therapy offers a promising approach to combat ocular neovascularization, a leading cause of blindness. By rebalancing molecular signals within the eye, this strategy aims for sustained therapeutic effects with minimal systemic impact.
Area of Science:
- Ophthalmology
- Molecular Biology
- Gene Therapy
Background:
- Ocular neovascularization is a primary cause of blindness and visual impairment.
- Molecular imbalances between stimulatory and inhibitory proteins drive this condition.
- Gene transfer presents a targeted therapeutic strategy for ocular neovascularization.
Purpose of the Study:
- To explore the potential of ocular gene transfer for treating neovascularization.
- To discuss candidate transgenes and their therapeutic rationale.
- To review experimental evidence supporting gene therapy for ocular neovascularization.
Main Methods:
- Utilizing various vector systems and transgenes in preclinical models.
- Developing ocular gene transfer techniques for sustained intraocular effects.
- Analyzing molecular signals involved in ocular neovascularization.
Main Results:
- Proof-of-concept established in animal models for ocular gene therapy.
- A Phase I study demonstrated the feasibility of intraocular adenoviral vector injection.
- Identification of key molecular signals contributing to neovascularization.
Conclusions:
- Ocular gene transfer is a viable therapeutic approach for neovascularization.
- Further development and clinical trials of vectors and transgenes are anticipated.
- Restoring molecular balance in the eye offers a path to prevent blindness.
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