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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
Published on: February 1, 2019
Polyethylenimine nanoparticles as efficient transfecting agents for mammalian cells
Surendra Nimesh1, Anita Goyal1, Vikas Pawar2
1Nucleic Acids Research Laboratory and Division of Allergy and Infectious Diseases, Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi - 110 007, India.
Summary
New polyethyleneimine (PEI)-polyethylene glycol (PEG) nanoparticles were developed for gene delivery. These PEI-PEG nanoparticles show enhanced transfection efficiency and reduced toxicity compared to existing methods.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Gene Delivery Systems
Background:
- Polyethyleneimine (PEI) is a cationic polymer used for gene delivery but suffers from high toxicity.
- Developing safer and more effective PEI-based nanocarriers is crucial for advancing gene therapy.
Purpose of the Study:
- To synthesize and characterize novel polyethylene glycol (PEG)-cross-linked polyethylenimine (PEI) nanoparticles.
- To evaluate the DNA binding capability, transfection efficacy, and toxicity of these PEI-PEG nanoparticles.
Main Methods:
- Synthesis of PEG-based cross-linkers (PEG-bis (phosphate) and PEG-bis (p-nitrophenylcarbonate)).
- Formation of PEI-PEG nanoparticles via ionic and covalent cross-linking.
- Characterization using dynamic light scattering (DLS) and transmission electron microscopy (TEM).
- Assessment of DNA binding, zeta potential, transfection efficiency (COS-1 cells), and cytotoxicity (MTT assay).
Main Results:
- PEI-PEG nanoparticles with hydrodynamic radii of 18-75 nm were successfully prepared.
- Nanoparticle properties, including zeta potential, were tunable by varying cross-linking degree.
- PEI-PEG nanoparticles demonstrated 5- to 16-fold higher transfection efficiency than lipofectin and PEI.
- Significantly reduced toxicity was observed for PEI-PEG nanoparticles compared to PEI.
- PEI-PEG8000 (5% ionic) nanoparticles exhibited the highest in vitro transfection efficiency.
Conclusions:
- PEGylation of PEI through cross-linking effectively reduces toxicity while enhancing gene delivery capabilities.
- Tunable PEI-PEG nanoparticles represent a promising platform for safe and efficient gene transfection.
- Specific formulations, like PEI-PEG8000 (5% ionic), show superior performance for in vitro applications.
