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Poly(β-amino amine) cross-linked PEIs as highly efficient gene vectors
Ji-Zhe Deng1, Yun-Xia Sun, Hui-Yuan Wang
1Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, People's Republic of China.
Acta Biomaterialia
|February 9, 2011
Summary
Novel biodegradable polymeric gene carriers, SS-PBAA-PEIs, enhance DNA delivery and transgene expression. These non-viral vectors show high efficiency and low toxicity, even in serum conditions.
Area of Science:
- Biomaterials Science
- Gene Therapy
- Polymer Chemistry
Background:
- Effective gene delivery requires efficient DNA release into the cytoplasm.
- Non-viral gene vectors often face challenges with transfection efficiency and cytotoxicity.
- Biodegradable carriers that respond to cytoplasmic conditions are needed.
Purpose of the Study:
- To develop novel biodegradable polymeric gene carriers for enhanced DNA release and transgene expression.
- To synthesize disulfide-containing poly(β-amino amine)-cross-linked polyethyleneimine (SS-PBAA-PEIs).
- To evaluate the physicochemical properties, in vitro transfection efficiency, and cytotoxicity of SS-PBAA-PEIs.
Main Methods:
- Synthesis of disulfide-containing poly(β-amino amine)s and cross-linking of low molecular weight polyethyleneimine (1800 Da).
- Characterization of SS-PBAA-PEI/DNA complexes.
- In vitro transfection assays under serum conditions and cell uptake studies using confocal microscopy.
Main Results:
- SS-PBAA-PEIs demonstrated efficient DNA condensation capabilities.
- In vitro transfection efficiency was comparable or superior to 25 kDa polyethyleneimine (PEI) under serum conditions.
- SS-PBAA-PEIs exhibited significantly lower cytotoxicity compared to 25 kDa PEI.
Conclusions:
- SS-PBAA-PEIs are promising non-viral gene vectors.
- These carriers offer high transfection efficiency in the presence of serum.
- The biodegradability and low cytotoxicity of SS-PBAA-PEIs make them suitable for gene delivery applications.
