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Assembly and Characterization of Polyelectrolyte Complex Micelles
Published on: March 2, 2020
Cationic shell-cross-linked knedel-like (cSCK) nanoparticles for highly efficient PNA delivery
Huafeng Fang1, Ke Zhang, Gang Shen
1Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130, USA.
Molecular Pharmaceutics
|February 24, 2009
Summary
New cationic nanoparticles efficiently deliver peptide nucleic acids (PNAs) into cells, overcoming previous delivery limitations for PNA-based diagnostics and therapeutics.
Area of Science:
- Biotechnology
- Nanomedicine
- Molecular Biology
Background:
- Peptide nucleic acids (PNAs) are promising for biological probes but face challenges in cell membrane penetration.
- Limited in vivo applications of PNAs hinder their use as diagnostic and therapeutic agents.
Purpose of the Study:
- To develop efficient nanoparticle-based delivery systems for PNAs into cells.
- To overcome the membrane permeability barrier of PNAs for potential in vivo applications.
Main Methods:
- Development of cationic shell-cross-linked knedel-like (cSCK) nanoparticles.
- Complexation of PNAs with cSCKs via electrostatic interactions or disulfide linkages.
- Evaluation of PNA delivery efficiency, toxicity, and bioactivity in HeLa cells compared to standard methods.
Main Results:
- cSCK nanoparticles demonstrated highly efficient PNA delivery into HeLa cells.
- These systems showed lower toxicity and higher bioactivity compared to Lipofectamine/ODN and Arg(g)-mediated methods.
- cSCKs facilitated PNA endocytosis and endosomal escape, with nanoparticles remaining in endosomes.
Conclusions:
- cSCK nanoparticles represent a superior delivery platform for PNAs, enhancing their cellular uptake and bioactivity.
- This advancement holds significant potential for the development of PNA-based in vivo diagnostic and therapeutic tools.
