Design of serum compatible tetrary complexes for gene delivery

Area of Science:

• Biomaterials Science
• Gene Therapy
• Nanotechnology

Background:

• Gene delivery systems are crucial for therapeutic applications.
• Existing systems often struggle with efficiency in biological environments like serum.
• Polyethylenimine (PEI) is a common gene carrier but can be cytotoxic.

Purpose of the Study:

• To develop and characterize a novel gene delivery system, PoSC, with enhanced performance in serum.
• To evaluate the transfection efficiency and cytotoxicity of PoSC.
• To elucidate the roles of PSP and HA in the PoSC system's function.

Main Methods:

• Synthesis and characterization of the PoSC complex (PEI/PSP/HA).
• Transfection efficiency assays in NIH3T3 and HCT116 cells at varying serum concentrations.
• Cytotoxicity assessments of PoSC at working concentrations.

Main Results:

• PoSC demonstrated high transfection efficiencies of 51% (NIH3T3) and 87% (HCT116) at 50% serum concentration.
• The PoSC system exhibited no cytotoxic effects at its effective concentrations.
• Compared to DNA/PEI/HA, PoSC maintained high efficiency in the presence of serum.

Conclusions:

• Hyaluronic acid (HA) adsorption on cationic complexes improves transfection efficiency.
• Pseudoperovskite (PSP) is critical for maintaining high transfection efficiency in high-serum conditions.
• PoSC represents a promising, efficient, and safe gene delivery vector for in vivo applications.