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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
Published on: August 6, 2019
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Hyperbranched PEGmethacrylate linear pDMAEMA block copolymer as an efficient non-viral gene delivery vector
Asha Mathew1, Hongliang Cao, Estelle Collin
1Network of Excellence for Functional Biomaterials, NFB Building, IDA Business Park, Newcastle Road, Dangan, National University of Ireland, Galway, Ireland. a.mathew2@nuigalway.ie
International Journal of Pharmaceutics
|June 6, 2012
Summary
This study introduces a novel polymer for gene delivery, combining a DNA-binding block with a protective shell. The new polymer achieves high transfection efficiency and cell viability, outperforming commercial gene vectors.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
- Gene Delivery Systems
Background:
- Efficient gene delivery requires safe and effective non-viral vectors.
- Existing vectors like poly(amido amine) dendrimers and polyethylene imine often face challenges with cytotoxicity and transfection efficiency.
- Hyperbranched polymers offer unique structural advantages for biomaterial applications.
Purpose of the Study:
- To design and synthesize a novel hyperbranched polymeric system for enhanced gene delivery.
- To evaluate the transfection efficiency and cellular toxicity of the new polymer.
- To compare the performance of the developed polymer against commercial gene delivery vectors.
Main Methods:
- Synthesis of a unique hyperbranched polymer using deactivation-enhanced atom transfer radical polymerization (DE-ATRP).
- The polymer features a linear poly-2-dimethylaminoethyl methacrylate (pDMAEMA) block for plasmid DNA (pDNA) binding and a hyperbranched polyethylene glycol (PEG) shell.
- In vitro assessment of transfection capability and cytotoxicity in fibroblasts and adipose tissue-derived stem cells (ADSCs) at various pDNA concentrations.
Main Results:
- The synthesized polymer demonstrated efficient binding to pDNA via its linear pDMAEMA block.
- The hyperbranched PEG shell provided protection, maintaining high transfection levels while ensuring cellular viability, even at high polymer doses.
- Performance comparison showed favorable transfection and safety profiles relative to branched polyethylene imine (PEI) and partially degraded poly(amido amine)dendrimer (dPAMAM).
Conclusions:
- The novel hyperbranched polymeric system offers a promising alternative for safe and efficient gene delivery.
- The unique block copolymer structure effectively balances DNA complexation and cellular protection.
- This advanced biomaterial warrants further investigation for therapeutic gene delivery applications.
