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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
Published on: August 6, 2019
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A Cationic Smart Copolymer for DNA Binding
Tânia Ribeiro1, Ana Margarida Santiago2, Jose Manuel Gaspar Martinho3
1CQFM-Centro de Química-Física Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal. tania.ribeiro@tecnico.ulisboa.pt.
Polymers
|April 11, 2019
Summary
Researchers developed a novel temperature-responsive, cationic block copolymer using RAFT polymerization. This new polymer enables tunable DNA binding and coacervate complex formation for potential gene delivery applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Biotechnology
Background:
- Developing advanced polymers for biomedical applications is crucial.
- Block copolymers offer tunable properties for specific functions.
- Controlled polymerization techniques are essential for precise material synthesis.
Purpose of the Study:
- To synthesize a novel block copolymer with temperature-responsive and DNA-binding capabilities.
- To control the polymer's properties, such as its volume phase transition temperature (VPTT).
- To investigate the formation and characteristics of coacervate complexes with DNA.
Main Methods:
- Reversible Addition-Fragmentation chain Transfer (RAFT) polymerization was employed for synthesis.
- The block copolymer composition (di(ethylene glycol) methyl ether methacrylate and oligo(ethylene glycol) methyl ether methacrylate ratio) was varied.
- Fluorescence correlation spectroscopy and fluorescence spectroscopy were used for characterization.
Main Results:
- A block copolymer with a temperature-responsive block (tunable VPTT from 25 to >90 °C) and a cationic DNA-binding block (trimethyl-2-methacroyloxyethylammonium chloride) was successfully synthesized.
- Good control over polymer size and composition was achieved.
- Coacervate complexes formed between the block copolymer and single-strand DNA were characterized.
Conclusions:
- The synthesized block copolymer demonstrates tunable thermal properties and effective DNA binding.
- The material shows promise for biomedical applications, particularly in controlled gene delivery systems.
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