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Updated: May 9, 2026

Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
Published on: February 1, 2019
RNA replicon delivery via lipid-complexed PRINT protein particles
Jing Xu1, J Christopher Luft, Xianwen Yi
1Department of Chemistry, △Department of Pharmacology, ∥UNC Eshelman School of Pharmacy, †Carolina Center of Cancer Nanotechnology Excellence, ⊥Institute for Advanced Materials, #Institute for Nanomedicine, ¶Lineberger Comprehensive Cancer Center, and ■Department of Biochemistry and Biophysics, University of North Carolina , Chapel Hill, North Carolina 27599, United States.
Researchers developed a novel lipid-complexed protein particle system for delivering RNA replicons. This system shows promise for RNA replicon-based vaccines, highlighting the need for degradable cross-linkers in particle design.
Area of Science:
- Biotechnology
- Nanotechnology
- Vaccine Development
Background:
- Nonviral vectors are crucial for safe and effective nucleic acid delivery.
- RNA replicons offer a platform for vaccine development but require efficient delivery systems.
- Particle Replication in Nonwetting Templates (PRINT) technology enables precise fabrication of nanoparticles.
Purpose of the Study:
- To develop a nonviral, lipid-complexed protein particle (LPP) system for RNA replicon delivery.
- To evaluate the potential of this LPP system for RNA replicon-based vaccination.
- To investigate the role of cross-linker degradability in RNA replicon delivery.
Main Methods:
- Fabrication of cylindrical bovine serum albumin (BSA) particles using PRINT technology.
- Loading BSA particles with RNA replicon and stabilizing them with a reversible disulfide cross-linker.
- Complexing fabricated particles with DOTAP and DOPE lipids for enhanced cellular delivery.
Main Results:
- Achieved highly efficient delivery of lipid-complexed LPP particles to Vero cells.
- Demonstrated that lipid complexation significantly enhances particle uptake.
- Confirmed the necessity of a degradable cross-linker for successful RNA replicon delivery.
Conclusions:
- Lipid-complexed protein particles represent a promising nonviral system for RNA replicon delivery.
- The developed LPP system holds potential for RNA replicon-based vaccine applications.
- Degradable cross-linkers are essential for effective RNA replicon release from protein-based delivery vehicles.
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