Related Experiment Video
Updated: Jun 16, 2026

Using Lipid Nanoparticles for the Delivery of Chemically Modified mRNA into Mammalian Cells
Published on: June 10, 2022
Perfluoroalkyl Chain-Modified Artificial Viral Capsid for Enhanced Intracellular Delivery of mRNA
Avijit Ghosh1, Yuka Yamamoto1, Mizuki Wada1
1Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
Researchers developed a novel peptide-based artificial viral capsid for safe and efficient delivery of messenger RNA (mRNA) therapeutics. This viral-mimetic approach enhances cellular uptake and protein expression while minimizing cytotoxicity, offering a promising alternative for nucleic acid-based medicines.
Area of Science:
- Biotechnology
- Nanomedicine
- Molecular Biology
Background:
- Therapeutic messenger RNA (mRNA) holds significant promise for protein replacement, vaccines, and genome editing.
- Current mRNA delivery methods face challenges including instability, poor cellular uptake, and carrier cytotoxicity.
- Existing platforms like lipid nanoparticles and liposomes have limitations in efficiency and safety.
Purpose of the Study:
- To develop a novel peptide-based artificial viral capsid for efficient and safe mRNA delivery.
- To overcome the limitations of existing mRNA delivery systems.
- To create a viral-mimetic platform for enhanced therapeutic mRNA applications.
Main Methods:
- Self-assembly of a peptide-based artificial viral capsid modified with a perfluoroalkyl (PFA) chain-conjugated cell-penetrating peptide (CADC6F13F).
- Hybridization of the capsid with the poly(A) tail of mRNA.
- Characterization of capsid formation and size using dynamic light scattering and transmission electron microscopy.
- Assessment of delivery efficiency and cytotoxicity in cellular models.
Main Results:
- Formation of spherical mRNA-encapsulated capsids approximately 200 nm in diameter.
- PFA modification significantly enhanced mRNA delivery efficiency into cells.
- Minimized cytotoxic effects were observed with the PFA-modified capsids.
- Demonstrated high expression of mCherry-encoding mRNA, indicating successful delivery and translation.
Conclusions:
- The developed peptide-based artificial viral capsid is a promising platform for safe and efficient mRNA therapeutics.
- This viral-mimetic approach overcomes key challenges associated with current mRNA delivery systems.
- The PFA-modified capsid offers a viable alternative for advancing nucleic acid-based medicines.
Related Concept Videos
Viruses with RNA Genomes
Leaky Scanning
RNA Editing
Genome Copying Errors
Viral Mutations
Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...

