Non-viral vectors for in vivo delivery of plasmid DNA rely on optimized formulations to achieve robust transgene expression. Several cationic lipids have been developed to deliver nucleic acids, but most recent literature has focused on mRNA due to its increased expression profile and excluded plasmid DNA, which may have the advantage of being less immunogenic. In this study, we describe the in vivo evaluation of cationic triazine based lipids, previously prepared by our group. We identify one lipid with limited in vivo toxicity for studies to optimize the lipid formulations, which include an evaluation of the influence of PEG and helper lipids on transgene expression. We then demonstrate that lipoplexes, but not lipid nanoparticles, formed from triazine lipids achieve similar transgene expression levels as AAV vectors and offer enhanced expression as compared to a commercially available cationic lipid, DOTAP. Importantly, the lipid nanoparticles and lipoplexes induce minimal antibody profiles toward the expressed protein, while serving as a platform to induce robust antibody responses when directly delivering the protein. Collectively, these data demonstrate the potential for triazine based lipids as non-viral vectors for gene delivery, and highlights the need to optimize each formulation based on the exact contents to achieve enhanced transgene expression with plasmid DNA constructs.
|Number of pages
|Published - Oct 7 2022
Bibliographical noteFunding Information:
This work was supported by National Institute of Health grants including the Kentucky Center for Clinical and Translational Science (UL1 TR001998; DN), R01 HL152081 (VJV), and the Center of Biomedical Research Excellence (COBRE) in Pharmaceutical Research and Innovation (CPRI, P20 GM130456; VJV), and the University of Kentucky College of Pharmacy. We also thank the Pharmacy Practice and Science Core Lab for use of use the BioTek Synergy H1 plate reader and Attune NxT flow cytometer, and Younsoo Bae for use of the Malvern Zetasizer Nano ZS.
© 2022 The Royal Society of Chemistry.
ASJC Scopus subject areas
- Biomedical Engineering
- Materials Science (all)