Dual stimuli-responsive saccharide core based nanocarrier for efficient Birc5-shRNA delivery

Area of Science:

• Biomaterials Science
• Nanotechnology
• Gene Therapy

Background:

• Stimuli-responsive delivery systems are crucial for effective gene transfection.
• Existing systems face challenges in achieving optimal delivery and therapeutic outcomes.
• Need for advanced nanocarriers with enhanced gene condensation, circulation, and cellular uptake.

Purpose of the Study:

• To develop and evaluate a novel dual stimuli-responsive nanocarrier for gene therapy.
• To assess the efficacy of the nanocarrier in delivering Birc5-shRNA for tumor inhibition.
• To investigate the biocompatibility and safety of the developed nanocarrier system.

Main Methods:

• Construction of a dual stimuli-responsive chitosan (SCS) core using pH-sensitive hydrazone and redox-sensitive disulfide bonds.
• Immobilization of polyethyleneimine (PEI) and polyethylene glycol (PEG) onto the SCS core to form SCS-g-PEI-g-PEG.
• In vitro and in vivo evaluation of gene delivery efficiency, tumor inhibition, and toxicity.

Main Results:

• The SCS-g-PEI-g-PEG nanocarrier exhibited dual stimuli-responsive properties.
• Significantly enhanced Birc5-shRNA gene expression and tumor inhibition were observed compared to non-responsive controls.
• The nanocarrier demonstrated excellent biocompatibility in both in vitro and in vivo toxicity assessments.

Conclusions:

• The novel SCS-g-PEI-g-PEG nanocarrier is an efficient and biocompatible system for gene therapy.
• Dual stimuli-responsiveness enhances gene delivery and therapeutic efficacy.
• This strategy offers a promising approach for developing advanced gene delivery vectors.