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Protein cytoplasmic delivery using polyampholyte nanoparticles and freeze concentration
Sana Ahmed1, Fumiaki Hayashi2, Toshio Nagashima3
1School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan; Department of Chemistry, University of Delhi, Delhi 110007, India.
Biomaterials
|May 13, 2014
Summary
This study introduces a novel protein delivery system using freeze concentration and polyampholyte nanocarriers. This method enhances protein uptake into cells, offering a promising tool for various cell engineering applications.
Area of Science:
- Biotechnology
- Materials Science
- Cell Biology
Background:
- Developing effective protein delivery systems is crucial for cellular therapies.
- Polyampholyte nanocarriers offer tunable properties for biomolecule encapsulation.
- Freeze concentration is a potential method to enhance cellular uptake.
Purpose of the Study:
- To synthesize and characterize polyampholyte nanocarriers for protein delivery.
- To investigate the enhancement of protein delivery efficacy using freeze concentration.
- To explore the potential of this method for in vitro protein and peptide delivery.
Main Methods:
- Hydrophobic modification of ε-poly-l-lysine to create polyampholytes.
- Self-assembly of polyampholytes into cationic or anionic nanoparticles.
- Adsorption of anionic or cationic proteins onto nanoparticles.
- Application of freeze concentration during cell incubation with protein-loaded nanoparticles.
Main Results:
- Synthesized polyampholyte nanocarriers demonstrated stability for at least 7 days.
- Freeze concentration significantly enhanced the adsorption of protein-loaded nanoparticles to L929 cells.
- Protein internalization into cells was observed via endocytosis after thawing.
- This represents the first report of enhanced protein delivery efficacy using freeze concentration.
Conclusions:
- The freeze concentration method effectively enhances protein delivery via polyampholyte nanocarriers.
- This approach shows potential for in vitro delivery of proteins and peptides for immunotherapy or phenotype modification.
- The developed nanocarrier system offers a versatile platform for intracellular delivery applications.
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