Biodegradable Poly(Amino Ester) with Aromatic Backbone as Efficient Nonviral Gene Delivery Vectors

Area of Science:

• Biomaterials Science
• Gene Therapy
• Polymer Chemistry

Background:

• Gene therapy requires efficient and biocompatible gene delivery vectors.
• Non-viral vectors are sought after to overcome limitations of viral vectors.
• Biodegradable polymers offer potential advantages in gene delivery systems.

Purpose of the Study:

• To synthesize and characterize novel biodegradable poly(amino ester)s for gene delivery.
• To evaluate the DNA-binding ability, polyplex characteristics, and transfection efficiency of these polymers.
• To compare the performance and toxicity of the developed polymers against commercial standards.

Main Methods:

• Synthesis of poly(amino ester)s via ring-opening polymerization.
• Molecular weight determination using Gel Permeation Chromatography (GPC).
• DNA-binding and complexation assessed by agarose gel retardation assays.
• Polyplex size and zeta-potential measured by dynamic light scattering.
• In vitro transfection efficiency and cytotoxicity evaluated in 293 cells.

Main Results:

• Two biodegradable poly(amino ester)s were successfully synthesized.
• The polymers exhibited strong DNA-binding capability, forming stable polyplexes.
• Polyplexes displayed optimal size (~200 nm) and zeta-potential (30-40 mV) for cellular uptake.
• Polymer P2 demonstrated superior transfection efficiency compared to PEI 25KDa and Lipofectamine 2000.
• Reduced cytotoxicity was observed with the novel poly(amino ester)s, particularly P2.

Conclusions:

• Biodegradable poly(amino ester)s are effective non-viral gene delivery vectors.
• The synthesized polymers offer a promising alternative to existing gene delivery systems.
• These materials exhibit a favorable balance of transfection efficiency and biocompatibility.