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Direct Protein Delivery to Mammalian Cells Using Cell-permeable Cys2-His2 Zinc-finger Domains
Published on: March 25, 2015
Functionalized linear poly(amidoamine)s are efficient vectors for intracellular protein delivery.
Grégory Coué1, Johan F J Engbersen
1Department of Biomedical Chemistry, MIRA Institute for Biomedical Technology and Technical Medicine, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Summary
Researchers developed novel poly(amidoamine)s (PAAs) for effective intracellular protein delivery. These non-toxic carriers successfully delivered β-galactosidase into cells, showing high activity.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Drug Delivery Systems
Background:
- Intracellular protein delivery remains a challenge for therapeutic applications.
- Developing safe and efficient carriers for protein therapeutics is crucial.
Purpose of the Study:
- To develop and evaluate functionalized linear poly(amidoamine)s (PAAs) as intracellular protein delivery systems.
- To assess the self-assembly, stability, cell internalization, and toxicity of PAA-protein nanocomplexes.
Main Methods:
- Synthesis of three functionalized PAAs with varying disulfide bond content.
- Formation of self-assembled cationic nanocomplexes with β-galactosidase.
- Evaluation of complex stability in reductive environments.
- Cell internalization and cytotoxicity assays.
Main Results:
- Water-soluble PAAs formed nanoscaled, positively-charged complexes with β-galactosidase.
- Disulfide-containing complexes destabilized in reductive intracellular environments.
- PAA-based nanocomplexes demonstrated minimal toxicity and efficient cellular uptake of β-galactosidase (up to 94% cell activity).
Conclusions:
- Functionalized PAAs are potent and non-toxic carriers for intracellular protein delivery.
- The developed system shows promise for novel protein-based therapeutic applications.
- Disulfide bonds facilitate intracellular release, enhancing delivery efficacy.
