Cationic lipids from multi-component Passerini reaction for non-viral gene delivery: A structure-activity...

Area of Science:

• Biomaterials Science
• Gene Therapy
• Organic Chemistry

Background:

• Cationic lipids are crucial for non-viral gene delivery systems.
• Simple and efficient synthesis of novel cationic lipids remains a challenge.
• The Passerini reaction offers a potential route to synthesize complex lipid structures.

Purpose of the Study:

• To synthesize novel cationic lipids using Passerini reaction and amide condensation.
• To investigate the structure-activity relationships of these lipids in gene delivery.
• To evaluate the efficiency of lipid nanoparticles (LNPs) formed by these lipids.

Main Methods:

• Synthesis of two series of cationic lipids (P-series and A-series) via Passerini reaction and amide condensation.
• Formation of lipid nanoparticles (LNPs) for DNA condensation.
• Evaluation of transfection efficiency, serum tolerance, cellular uptake, and cytotoxicity.

Main Results:

• Both P-series and A-series lipids formed LNPs capable of DNA condensation.
• P-series LNPs exhibited significantly higher transfection efficiency, serum tolerance, and cellular uptake.
• P-series LNPs demonstrated lower cytotoxicity compared to A-series LNPs.
• Positional isomers of P-series lipids showed varied transfection efficiency and cytotoxicity.

Conclusions:

• The Passerini reaction is a feasible and efficient method for synthesizing cationic lipids for gene delivery.
• P-series lipids offer advantages over A-series lipids in gene delivery applications.
• Understanding structure-activity relationships, particularly the amine group's position, is key for designing effective non-viral gene vectors.