Non-viral vaccination through cationic guanidium polymer-pDNA polyplex mediated gene transfer

Area of Science:

• Biotechnology
• Immunology
• Materials Science

Background:

• Nucleotide-based vaccines offer a flexible approach to disease prevention.
• Non-viral immunomodulation strategies are crucial for developing effective vaccines.
• Plasmid DNA (pDNA) vaccines are potent tools for inducing immune responses.

Purpose of the Study:

• To develop a novel non-viral vector for pDNA delivery.
• To assess the efficacy of guanidinium-functionalized poly(oxanorbornene)imide (PONI-Guan) for pDNA condensation and transfection.
• To evaluate the immunogenicity of pDNA vaccines delivered by PONI-Guan in chickens against Newcastle disease virus (NDV).

Main Methods:

• Synthesis of guanidinium-functionalized poly(oxanorbornene)imide (PONI-Guan) homopolymers.
• Condensation of pDNA into discrete polyplexes using PONI-Guan.
• In vitro transfection of endothelial cells and HD-11 macrophages.
• In vivo vaccination of white leghorn chickens against NDV.

Main Results:

• PONI-Guan effectively condensed pDNA into stable polyplexes.
• Efficient in vitro transfection of target cells was achieved.
• Vaccination of chickens with pDNA/PONI-Guan polyplexes elicited strong humoral immune responses against NDV.
• The PONI-Guan vector demonstrated versatility for targeted immunomodulation.

Conclusions:

• Guanidinium-functionalized PONI-Guan polymers are effective non-viral vectors for pDNA delivery.
• This approach shows significant potential as a versatile platform for developing non-viral vaccines.
• The study highlights a promising strategy for in vivo immunomodulation and disease prevention.