Polyethylenimine: A versatile, multifunctional non-viral vector for nucleic acid delivery

Area of Science:

• Biotechnology
• Materials Science
• Molecular Biology

Background:

• Polyethylenimine (PEI) is extensively researched for designing nucleic acid delivery systems.
• PEI facilitates gene delivery through DNA condensation, cellular uptake, endosomal escape, and nuclear entry.
• PEI's positive charge enables the formation of nanoscale complexes with nucleic acids, offering protection and intracellular release.

Purpose of the Study:

• To review the properties of various PEIs for nucleic acid delivery.
• To discuss cellular uptake mechanisms of non-viral vectors for gene delivery.
• To explore modified PEI applications and simulation studies for complexation mechanisms.

Main Methods:

• Literature review of polyethylenimine (PEI) applications in nucleic acid delivery.
• Analysis of PEI properties, including charge, structure (linear/branched), and complexation with nucleic acids.
• Discussion of cellular uptake pathways and endosomal escape mechanisms relevant to PEI-mediated delivery.

Main Results:

• PEI effectively condenses nucleic acids into nanoparticles for delivery.
• Modified PEIs show improved efficacy, pharmacokinetics, biocompatibility, and targeted delivery.
• Simulation studies aid in understanding PEI-nucleic acid complexation.

Conclusions:

• PEI is a promising non-viral vector for gene and RNA delivery.
• PEI modifications are crucial for optimizing therapeutic applications.
• Clinical trials and patents indicate the progressing utility of PEI-based systems.