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Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
Published on: March 1, 2013
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Cross-linked polymers with fluorinated bridges for efficient gene delivery.
Ya-Ping Xiao1, Ji Zhang, Yan-Hong Liu
1Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China. jzhang@scu.edu.cn xqyu@scu.edu.cn.
Journal of Materials Chemistry. B
|April 9, 2020
Summary
New fluorinated cationic polymers offer enhanced gene delivery. These novel polymers demonstrate superior DNA condensation, transfection efficiency, and serum resistance compared to traditional vectors, with low cytotoxicity.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
- Gene Therapy
Background:
- Cationic polymers are essential for gene delivery, but often face challenges with efficiency and stability.
- Existing polymeric gene vectors can exhibit limitations in serum conditions and cellular uptake mechanisms.
Purpose of the Study:
- To develop novel fluorinated cationic polymers for improved gene delivery applications.
- To investigate the impact of backbone fluorination on polymer properties and gene transfection efficacy.
Main Methods:
- Synthesis of fluorinated polymers via epoxide ring-opening polymerization of low molecular weight polyethyleneimine (PEI) with fluorinated diols.
- Characterization of DNA condensation, nanoparticle formation (size, zeta-potential), and polyplex stability.
- In vitro gene delivery assessment in 2D and 3D cell cultures, including transfection efficiency, serum resistance, cytotoxicity, and cellular uptake studies.
Main Results:
- Successfully synthesized fluorinated polymers with backbone fluorination, showing excellent DNA condensation and protection.
- Achieved efficient gene delivery in vitro, outperforming PEI 25 kDa and non-fluorinated analogs, especially in 3D cultures.
- Demonstrated enhanced serum resistance and tolerance correlated with fluorine content, alongside low cytotoxicity.
Conclusions:
- Fluorinated cationic polymers represent a promising strategy for advanced gene delivery systems.
- Backbone fluorination enhances polyplex stability, transfection efficiency, and serum resistance.
- These novel vectors offer a viable alternative to existing gene delivery agents with improved performance and safety profiles.
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