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Updated: Feb 25, 2026
08:51
Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
Published on: March 1, 2013
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Degradable polyesters via ring-opening polymerization of functional valerolactones for efficient gene delivery
Ling Song1, Ai-Xiang Ding, Ke-Xin Zhang
1Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Xinjiekouwai Street 19, Beijing 100875, China. luzl@bnu.edu.cn.
Organic & Biomolecular Chemistry
|July 28, 2017
Summary
New degradable polymers effectively deliver genes into cells, showing promise as non-viral gene vectors. These novel block co-polyesters demonstrate superior performance and biocompatibility compared to existing options.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Gene Delivery Systems
Background:
- Degradable polymers are crucial for advanced biomedical and pharmaceutical applications, particularly as gene and drug carriers.
- Developing efficient and biocompatible non-viral gene vectors remains a significant challenge in gene therapy.
Purpose of the Study:
- To synthesize and characterize novel block and random co-polyesters for gene delivery.
- To evaluate the gene delivery performance, biocompatibility, and degradability of these novel polymers.
Main Methods:
- Synthesis of block (B1-B6) and random (C1-C4) co-polyesters via ring-opening polymerization.
- Assessment of polymer-plasmid DNA (pDNA) complexation and characterization of polyplex size.
- In vitro transfection efficiency (TE) studies in Hek293T cells and comparison with polyethylenimine (PEI) 25k.
- Evaluation of polymer biocompatibility and degradability.
Main Results:
- Synthesized polymers effectively condensed plasmid DNA (pDNA) at weight ratios of 2-6.
- Polyplexes formed with polymers exhibited stable sizes ranging from 75 to 220 nm and were internalized into cells.
- Block copolymers generally outperformed random copolymers, with B5 showing the highest TE (2.2x PEI 25k).
- Aliphatic chain length significantly influenced transfection efficiency, and polymers demonstrated improved biocompatibility and degradability over PEI 25k.
Conclusions:
- The synthesized degradable co-polyesters are effective non-viral gene vectors.
- Block copolymer architecture and aliphatic chain length are key factors for optimizing gene delivery.
- These novel polymers offer a promising, biocompatible, and degradable alternative to existing gene delivery systems.
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