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Updated: Jul 20, 2026

Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries
Published on: September 6, 2012
Amphiphilic polyanhydrides for protein stabilization and release
María P Torres1, Amy S Determan, Gretchen L Anderson
1Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA.
Novel biodegradable polyanhydride microspheres stabilize and sustain the release of therapeutic proteins. This CPTEG:CPH system preserves protein structure and biological activity, showing promise for in vivo applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Drug Delivery
Background:
- Developing effective delivery systems for therapeutic peptides and proteins is crucial.
- Polyanhydrides offer potential as biodegradable carriers due to their tunable properties.
Purpose of the Study:
- To design and synthesize novel amphiphilic biodegradable polyanhydride systems.
- To evaluate these systems for the stabilization and sustained release of model proteins.
Main Methods:
- Synthesized copolymers of 1,6-bis(p-carboxyphenoxy)hexane (CPH) and 1,8-bis(p-carboxyphenoxy)-3,6-dioxaoctane (CPTEG).
- Fabricated microspheres using solid/oil/oil double emulsion and cryogenic atomization.
- Assessed protein stabilization and structure using gel electrophoresis, circular dichroism, and fluorescence spectroscopy.
Main Results:
- The CPTEG:CPH polyanhydride system effectively stabilized model proteins (lysozyme, ovalbumin).
- Structural integrity of encapsulated and released proteins was maintained.
- Biological activity of the released proteins was preserved.
Conclusions:
- Amphiphilic polyanhydride microspheres demonstrate potential for protein stabilization.
- The CPTEG:CPH system facilitates sustained release while maintaining protein structure and function.
- These findings support further in vivo investigation for therapeutic protein delivery.
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