Electrotransfection: A Different Approach to Plasmid Delivery

One of Eyevensys’s nonviral gene therapy sustained drug-delivery products, EYS809, may replace the need for repeated intravitreal injections and improve vision in patients diagnosed with wet age-related macular degeneration (AMD). The investigational therapy is a dual-gene plasmid designed to deliver sustained concentrations of both the anti-VEGF inhibitor aflibercept (Eylea, Regeneron Pharmaceuticals) and decorin, an endogenous transforming growth factor-beta inhibitor with known anti-angiogenic and anti-fibrotic properties, that has been demonstrated to reduce choroidal neovascularization (CNV) in the rat laser CNV model.

DNA plasmids are delivered via electrotransfection rather than viral vectors, which may be advantageous as there is no need for subretinal surgery, easy delivery, and no immunogenicity related to the vector. Dosing can be repeated to extend treatment effect and the relatively unlimited cargo capacity allows for the delivery of 2 therapeutic proteins.

GeneTherapyLive spoke with Thierry Bordet, PhD, chief scientific officer of Eyevensys, and Ronald Buggage, MD, chief medical officer of Eyevensys, to learn more about the company’s drug development pipeline. They also discussed how their approach differentiates them from other gene therapy companies.