CAGW Peptide Modified Biodegradable Cationic Copolymer for Effective Gene Delivery

Area of Science:

• Biomaterials Science
• Gene Therapy
• Nanotechnology

Background:

• Gene therapy is crucial for enhancing endothelialization of artificial vascular grafts.
• Effective gene carriers require low cytotoxicity and high transfection efficiency.
• Current gene delivery systems face challenges in targeting specific cells.

Purpose of the Study:

• To develop a novel biodegradable gene carrier system for enhanced endothelialization of vascular grafts.
• To improve targeted gene delivery to endothelial cells.
• To evaluate the efficacy and safety of the developed gene carrier.

Main Methods:

• Preparation of a biodegradable cationic copolymer: poly(d,l-lactide-co-glycolide)-graft-PEI (PLGA-g-PEI).
• Grafting of Cys-Ala-Gly-Trp (CAGW) peptide onto the copolymer via thiol-ene Click-reaction.
• Self-assembly into micelles and condensation of pEGFP-ZNF580 plasmids (pDNA) to form gene complexes.
• Evaluation of gene complexes for diameter, zeta potential, cytotoxicity, and transfection efficiency in EA.hy926 cells.

Main Results:

• The PLGA-g-PEI-g-CAGW/pDNA gene complexes exhibited suitable diameter and zeta potential for cellular uptake.
• The gene carrier system demonstrated low cytotoxicity towards EA.hy926 cells.
• High transfection efficiency was achieved in EA.hy926 cells, indicating successful gene delivery.

Conclusions:

• The developed PLGA-g-PEI-g-CAGW copolymer micelles serve as an effective gene carrier system.
• The CAGW peptide facilitates targeted recognition and enhanced transfection of endothelial cells.
• This novel gene delivery system holds promise for improving endothelialization of artificial vascular grafts through gene therapy.