3D Macrocyclic Structure Boosted Gene Delivery: Multi-Cyclic Poly(β-Amino Ester)s from Step Growth Polymerization.

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Gene Therapy

Background:

• Polymer topology significantly impacts gene delivery efficiency.
• Novel polymeric structures are needed as gene delivery vectors.

Purpose of the Study:

• Synthesize and characterize novel multi-cyclic poly(β-amino ester)s (CPAEs).
• Investigate the effect of polymer topology on gene delivery efficiency.
• Evaluate MCPAE vector performance for CRISPR-mediated gene editing.

Main Methods:

• Step-growth polymerization for CPAE synthesis.
• Control of cyclization to obtain different ring topologies.
• In vitro transfection assays to measure transgene expression.
• Delivery of CRISPR plasmid for gene editing.

Main Results:

• Successfully synthesized three types of CPAEs with varying ring sizes and topologies.
• CPAEs with macro rings (MCPAEs) showed significantly enhanced transgene expression compared to branched polymers.
• Optimized MCPAE vector efficiently delivered CRISPR plasmid for gene editing therapy.

Conclusions:

• Multi-cyclic polymer topology, particularly macrocyclic structures, can enhance gene delivery.
• MCPAEs represent a promising class of vectors for gene therapy applications.
• MCPAE vector demonstrated efficacy in delivering CRISPR components for gene editing.