Degradable terpolymers with alkyl side chains demonstrate enhanced gene delivery potency and nanoparticle stability

Area of Science:

• Biomaterials Science
• Gene Therapy
• Polymer Chemistry

Background:

• Non-viral gene delivery systems are crucial for therapeutic applications.
• Developing efficient and safe gene delivery vectors remains a significant challenge.
• Poly(β-amino ester)s (PBAEs) are promising candidates for gene delivery due to their degradability and cationic nature.

Purpose of the Study:

• To develop novel degradable, cationic poly(β-amino ester)s (PBAEs) with alkyl side chains for enhanced non-viral gene delivery.
• To investigate the properties of nanoparticles formed from these PBAE terpolymers.
• To assess the potential for functionalization and in vivo application of these novel PBAE materials.

Main Methods:

• Synthesis of PBAE terpolymers with varying alkyl side chain lengths.
• Formation and characterization of nanoparticles from PBAE terpolymers.
• Evaluation of DNA transfection efficiency in vitro.
• Assessment of nanoparticle stability and resistance to aggregation.
• Investigation of interactions with PEG-lipid conjugates for functionalization.

Main Results:

• PBAE terpolymers with alkyl side chains formed nanoparticles with significantly enhanced DNA transfection potency compared to PBAEs lacking such chains.
• The nanoparticles exhibited improved resistance to aggregation, suggesting enhanced stability.
• Hydrophobic PBAE terpolymers demonstrated successful interaction with PEG-lipid conjugates.
• This interaction facilitates functionalization with shielding and targeting moieties.

Conclusions:

• Degradable, cationic PBAEs with alkyl side chains represent a promising advancement in non-viral gene delivery.
• The developed PBAE terpolymers offer enhanced transfection efficiency and stability.
• Their ability to interact with PEG-lipid conjugates opens avenues for targeted delivery and accelerated in vivo translation.