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Gautam M, Jozic A, Su GLN, Herrera-Barrera M, Curtis A, Arrizabalaga S, Tschetter W, Ryals RC, Sahay G. Lipid nanoparticles with PEG-variant surface modifications mediate genome editing in the mouse retina. Nat Commun 2023; 14:6468. [PMID: 37833442 PMCID: PMC10575971 DOI: 10.1038/s41467-023-42189-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Ocular delivery of lipid nanoparticle (LNPs) packaged mRNA can enable efficient gene delivery and editing. We generated LNP variants through the inclusion of positively charged-amine-modified polyethylene glycol (PEG)-lipids (LNPa), negatively charged-carboxyl-(LNPz) and carboxy-ester (LNPx) modified PEG-lipids, and neutral unmodified PEG-lipids (LNP). Subretinal injections of LNPa containing Cre mRNA in the mouse show tdTomato signal in the retinal pigmented epithelium (RPE) like conventional LNPs. Unexpectedly, LNPx and LNPz show 27% and 16% photoreceptor transfection, respectively, with striking localization extending from the photoreceptor synaptic pedicle to the outer segments, displaying pan-retinal distribution in the photoreceptors and RPE. LNPx containing Cas9 mRNA and sgAi9 leads to the formation of an oval elongated structure with a neutral charge resulting in 16.4% editing restricted to RPE. Surface modifications of LNPs with PEG variants can alter cellular tropism of mRNA. LNPs enable genome editing in the retina and in the future can be used to correct genetic mutations that lead to blindness.
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Affiliation(s)
- Milan Gautam
- Department of Pharmaceutical Sciences, College of Pharmacy, Robertson Life Sciences Building, Oregon State University, Portland, OR, 97201, USA
| | - Antony Jozic
- Department of Pharmaceutical Sciences, College of Pharmacy, Robertson Life Sciences Building, Oregon State University, Portland, OR, 97201, USA
| | - Grace Li-Na Su
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Marco Herrera-Barrera
- Department of Pharmaceutical Sciences, College of Pharmacy, Robertson Life Sciences Building, Oregon State University, Portland, OR, 97201, USA
| | - Allison Curtis
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Sebastian Arrizabalaga
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Wayne Tschetter
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Renee C Ryals
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA.
| | - Gaurav Sahay
- Department of Pharmaceutical Sciences, College of Pharmacy, Robertson Life Sciences Building, Oregon State University, Portland, OR, 97201, USA.
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, 97239, USA.
- Department of Biomedical Engineering, Robertson Life Sciences Building, Oregon Health & Science University, Portland, OR, 97201, USA.
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