Abstract
Considerable progress has been made in the design and delivery of non-viral gene therapy vectors, but, like their viral counterparts, therapeutic levels of transgenes have not met the requirements for successful clinical applications so far. The biggest advantage of polymer-based nanoparticle vectors is the ease with which they can be modified to increase their ability to penetrate the cell membrane and target specific cells by simply changing the formulation of the nanoparticle compaction. We took advantage of this characteristic to improve transfection rates of our particles to meet the transgene levels which will be needed for future treatment of patients. For this study, we successfully investigated the possibility of our established pegylated polylysine particles to be administered via intravitreal rather than subretinal route to ease the damage during injection. We also demonstrated that our particles are flexible enough to sustain changes in the formulation to accommodate additional targeting sequences without losing their efficiency in transfecting neuronal cells in the retina. Together, these results give us the opportunity to even further improve our particles.
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Acknowledgments
This work was supported by the NIH (EY18656 and EY022778), the Foundation Fighting Blindness (MIN, MRA), and the Knights Templar Eye Foundation (RZ).
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Zulliger, R. et al. (2018). Optimizing Non-viral Gene Therapy Vectors for Delivery to Photoreceptors and Retinal Pigment Epithelial Cells. In: Ash, J., Anderson, R., LaVail, M., Bowes Rickman, C., Hollyfield, J., Grimm, C. (eds) Retinal Degenerative Diseases. Advances in Experimental Medicine and Biology, vol 1074. Springer, Cham. https://doi.org/10.1007/978-3-319-75402-4_14
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DOI: https://doi.org/10.1007/978-3-319-75402-4_14
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