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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

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Aminated poly(glycidyl methacrylate)s for constructing efficient gene carriers.

X B Dou¹, M Y Chai, Y Zhu

¹State Key Laboratory of Chemical Resource Engineering, Ministry of Education College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing China 100029.

ACS Applied Materials & Interfaces

|March 22, 2013

Summary

Aminated poly(glycidyl methacrylate) (PGMA) gene delivery vectors were modified with different amines. 1-amino-2-propanol functionalized PGMA showed the best gene transfection efficiency with low toxicity.

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Area of Science:

Polymer chemistry
Biomaterials science
Gene therapy

Background:

Aminated poly(glycidyl methacrylate) (PGMA) shows promise for gene delivery.
Ethanolamine (EA)-functionalized PGMA offers high transfection efficiency and low toxicity.

Purpose of the Study:

To synthesize and compare aminated PGMA vectors using various amine species for gene delivery.
To evaluate the impact of different amine structures on DNA condensation, pH buffering, cytotoxicity, and transfection efficiency.

Main Methods:

Amination of PGMA with 1-amino-2-propanol (AP1), 3-amino-2-propanol (AP2), ethanolamine (EA), and N,N,-dimethylethylenediamine (DED) and its quaternized form.
Systematic comparison of DNA condensation, pH buffering capacity, cytotoxicity, and gene transfection efficiency of the resulting vectors.

Main Results:

AP1- and AP2-functionalized PGMA exhibited similar DNA condensation abilities to EA-PGMA, with AP1 showing the best transfection performance.
Quaternized DED-aminated PGMA demonstrated enhanced DNA condensation but poor pH buffering, leading to low transfection efficiency.
DED- and quaternized DED-aminated PGMA showed very low pH buffering capacities and poor gene transfection outcomes.

Conclusions:

The structure of the amine species significantly influences the biophysical properties and gene delivery efficiency of PGMA vectors.
1-amino-2-propanol functionalization represents a promising strategy for developing effective and safe PGMA-based gene delivery systems.
Understanding structure-property relationships is crucial for designing optimized PGMA delivery systems.