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Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
Published on: November 16, 2016
Triggered cargo release by encapsulated enzymatic catalysis in capsosomes
Rona Chandrawati1, Pascal D Odermatt, Siow-Feng Chong
1Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
Nano Letters
|October 14, 2011
Summary
Capsosomes co-encapsulate glutathione reductase to generate antioxidants and release therapeutics. This system uses reduced glutathione to break disulfide bonds, enabling controlled drug delivery.
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Nanotechnology
Background:
- Capsosomes are polymer carrier capsules with liposomal subcompartments.
- Controlled release of therapeutics is crucial for effective treatment.
- Antioxidants play a vital role in managing oxidative stress.
Purpose of the Study:
- To co-encapsulate glutathione reductase and disulfide-linked polymer-oligopeptide conjugates into capsosomes.
- To develop a temperature-triggered system for antioxidant generation and therapeutic release.
- To investigate the potential of capsosomes for simultaneous drug delivery and antioxidant production.
Main Methods:
- Coencapsulation of glutathione reductase and polymer-oligopeptide conjugates within capsosomes.
- Utilizing temperature triggers for enzymatic conversion of glutathione.
- Exploiting reduced glutathione to cleave disulfide linkages for oligopeptide release.
Main Results:
- Successful coencapsulation of active glutathione reductase and disulfide-linked conjugates.
- Demonstrated temperature-triggered conversion of oxidized glutathione to reduced glutathione.
- Observed release of oligopeptides mediated by reduced glutathione-induced disulfide bond cleavage.
- Capsosomes showed sustained generation of reduced glutathione.
Conclusions:
- Capsosomes can be engineered for simultaneous therapeutic release and in-situ antioxidant generation.
- The developed system offers a novel approach for managing oxidative stress and delivering therapeutics.
- This technology holds promise for advanced drug delivery applications requiring antioxidant support.
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