A Facile Multifunctionalized Gene Delivery Platform Based on α,β Cyclodextrin Dimers

Area of Science:

• Biomaterials Science
• Nanotechnology
• Gene Therapy

Background:

• Developing effective non-viral gene delivery vectors is crucial for gene therapy.
• Stimuli-responsive polymers offer advantages in controlled drug release and delivery.
• Host-guest interactions provide a versatile platform for assembling functional nanomaterials.

Purpose of the Study:

• To develop a novel reduction-sensitive gene delivery platform using adamantane-substituted polyethylenimine (Ad-b-SS-PEI600).
• To utilize alpha, beta-cyclodextrin (α,β-CD) dimers for bridging polyplexes with functional moieties.
• To achieve targeted gene delivery, in vitro/in vivo imaging, and efficient transfection.

Main Methods:

• Synthesis of adamantane-substituted reduction-sensitive polyethylenimine (Ad-b-SS-PEI600).
• Formation of polyplexes with DNA.
• Assembly of functional moieties (targeting ligand, fluorescent probe) using α,β-CD dimer host-guest interactions.
• In vitro and in vivo evaluation of gene delivery, transfection, targeting, and imaging capabilities.

Main Results:

• The Ad-b-SS-PEI600/DNA polyplexes demonstrated effective DNA compaction.
• The system exhibited rapid stimuli responsiveness.
• Post-decorated functional moieties on the assemblies efficiently performed their intended functions.
• The gene delivery platform showed good biocompatibility.
• Efficient gene transfection, targeting, and imaging were achieved both in vitro and in vivo.

Conclusions:

• The developed gene delivery platform based on Ad-b-SS-PEI600 and α,β-CD dimers is a promising tool for advanced gene therapy.
• The host-guest interaction strategy allows for versatile functionalization and targeted delivery.
• The system's stimuli-responsive nature and biocompatibility support its potential for clinical translation.