Laser-assisted targeted gene delivery to degenerated retina improves retinal function

Area of Science:

• Ophthalmology
• Gene Therapy
• Biomedical Optics

Background:

• Viral vector gene delivery for retinal diseases faces challenges like immune rejection and off-target effects.
• Restoring vision in inherited retinal diseases requires effective and safe gene delivery methods.

Purpose of the Study:

• To investigate nonviral gene delivery of opsin genes into the mouse retina using a femtosecond laser.
• To assess the efficacy and safety of laser-mediated gene transfer for vision restoration.

Main Methods:

• Utilized pulsed femtosecond laser microbeam for nonviral gene delivery of opsin encoding genes in vitro and in vivo.
• Performed in vitro patch-clamp recordings and in vivo visually evoked electrical recordings in laser-transfected mice.
• Evaluated gene expression in targeted retinal cells and assessed tissue damage.

Main Results:

• Demonstrated functional response in opsin-sensitized retinal cells and laser-transfected mouse eyes.
• Achieved reliable expression of therapeutic opsin in targeted retinal cells with minimal damage.
• Confirmed successful naked DNA gene therapy in a spatially targeted manner.

Conclusions:

• Femtosecond laser-mediated nonviral gene delivery is a safe and effective method for targeting retinal cells.
• This approach shows potential for treating inherited retinal diseases by restoring vision.
• Laser-based gene therapy offers a promising alternative to viral vectors for ophthalmic applications.