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Updated: May 26, 2026
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Optimized Minimally Invasive Transscleral Subretinal Injection Technique in Mouse
Published on: July 25, 2025
Novel strategy for subretinal delivery in Xenopus
Federico Gonzalez-Fernandez1, Cheryl A Dann, Mary Alice Garlipp
1Ross Eye Institute and Department of Ophthalmology, State University of New York, Buffalo, NY, USA. fg23@buffalo.edu
Molecular Vision
|December 16, 2011
Summary
Researchers developed a novel method for delivering molecules to the embryonic Xenopus subretinal space by injecting into the diencephalic ventricle. This technique offers an efficient and safe approach for potential gene therapy and drug delivery in developing eyes.
Area of Science:
- Developmental Biology
- Ophthalmology
- Regenerative Medicine
Background:
- The subretinal space is a target for delivering therapeutic agents like genetic vectors and nanopharmaceuticals.
- Current methods for subretinal delivery face challenges including material localization, retinal detachment complications, and invasive injection routes.
Purpose of the Study:
- To develop a novel strategy for accessing the embryonic Xenopus subretinal space.
- To utilize the natural continuity between the brain ventricle and optic vesicle during embryogenesis for targeted delivery.
Main Methods:
- Injections were performed into the optic vesicle or brain ventricle of Xenopus embryos at various developmental stages.
- Micropipettes were used to inject test solutions, including fluorescent microspheres (FluoSpheres®), into the targeted cavities.
- Embryos were analyzed through histology, cryosectioning, and observation of fluorescent markers in transgenic embryos.
Main Results:
- Brain ventricle injections, particularly into the diencephalic ventricle, achieved a high success rate (~90%) with minimal invasiveness.
- Injections before stage 31 successfully labeled the subretinal space, optic nerve, and ventral subretinal area without causing significant ocular malformations.
- FluoSpheres® were localized to the subretinal space, and green fluorescent protein (GFP) expression was observed in rod photoreceptors in transgenic embryos.
Conclusions:
- Diencephalic ventricular injection before stage 31 is an effective method for introducing molecules into the embryonic Xenopus subretinal space.
- This approach minimizes damage to the developing eye and retina, presenting a promising strategy for future ocular therapies.
