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Protein instability in poly(lactic-co-glycolic acid) microparticles.
M van de Weert1, W E Hennink, W Jiskoot
1Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands.
Pharmaceutical Research
|January 6, 2001
Summary
Maintaining protein integrity within poly(lactic-co-glycolic acid) (PLGA) microparticles during manufacturing, storage, and release is challenging. Stabilizing strategies improve protein stability, but fully preserving native protein structure remains a significant hurdle.
Area of Science:
- Biomaterials Science
- Pharmaceutical Technology
- Protein Chemistry
Background:
- Poly(lactic-co-glycolic acid) (PLGA) microparticles are widely used for controlled protein delivery.
- Protein degradation during formulation and release compromises therapeutic efficacy.
- Understanding degradation mechanisms is crucial for developing stable protein-loaded systems.
Purpose of the Study:
- To review current knowledge on protein degradation in PLGA microparticles.
- To discuss stabilization approaches for preserving protein integrity.
- To highlight challenges in formulating stable protein-loaded PLGA microparticles.
Main Methods:
- Literature review of protein degradation and stabilization in PLGA microparticles.
- Analysis of stress factors affecting protein structure during preparation, storage, and release.
- Evaluation of various stabilization strategies and their effectiveness.
Main Results:
- Protein degradation occurs throughout preparation, storage, and release from PLGA microparticles.
- Optimized process conditions and stabilizing excipients are necessary to mitigate degradation.
- Current stabilization approaches show some success but do not fully preserve native protein structure.
Conclusions:
- Full preservation of native protein structure in PLGA microparticles remains a significant challenge.
- Further research into advanced stabilization techniques is required for successful protein delivery systems.
- The principles discussed are applicable to other polymeric drug delivery systems.