Optimizing Biocompatibility and Gene Delivery with DMAEA and DMAEAm: A Niacin-Derived Copolymer Approach

Area of Science:

• Nanomedicine
• Biotechnology
• Polymer Chemistry

Background:

• Gene therapy is a promising treatment modality but faces challenges in balancing polymer biocompatibility and transfection efficacy.
• Developing safe and effective non-viral gene delivery vectors is crucial for advancing nanomedicine.

Purpose of the Study:

• To synthesize and evaluate a copolymer library for optimal biocompatibility and gene delivery efficacy.
• To investigate the impact of niacin-derived monomers and hydrolysis-labile components on polymer performance.

Main Methods:

• Synthesis of copolymers incorporating niacin-derived monomers (AAEN, AEN) and amine-containing monomers (DMAEAm, DMAEA).
• Assessment of polymer cytotoxicity and biocompatibility through varying monomer ratios.
• Evaluation of plasmid DNA transfection efficiency in HEK293T, THP-1, and Jurkat cells.
• Analysis of immune response modulation in ex vivo murine monocytes.

Main Results:

• Increased AAEN or DMAEA molar ratios improved polymer biocompatibility.
• Enhanced gene transfection efficiencies were observed with higher AAEN content in DMAEA and DMAEAm copolymers.
• Top-performing polymers demonstrated effective gene expression in difficult-to-transfect cell lines (THP-1, Jurkat).
• No significant modulation of immune response induction was detected in treated murine monocytes.

Conclusions:

• The synthesized copolymers offer an optimal balance between biocompatibility and gene delivery efficacy.
• These novel materials show significant potential for advancing gene therapy applications in nanomedicine.
• The study provides valuable insights into rational polymer design for improved gene delivery systems.