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Encapsulation performance of layer-by-layer microcapsules for proteins.

Marie-Luce De Temmerman1, Jo Demeester, Filip De Vos

  • 1Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.

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|March 8, 2011
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Summary
This summary is machine-generated.

This study optimized protein encapsulation in layer-by-layer (LbL) microcapsules. Protein encapsulation efficiency depends on protein properties and the number of polyelectrolyte layers used.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery

Background:

  • Microcapsules offer potential for controlled substance delivery.
  • Layer-by-layer (LbL) assembly is a versatile method for fabricating micro- and nanostructures.
  • Optimizing encapsulation efficiency is crucial for the efficacy of microcapsule-based therapies.

Purpose of the Study:

  • To investigate and enhance the encapsulation efficiency of proteins within dextran sulfate/poly-L-arginine microcapsules.
  • To identify key factors influencing protein loss during microcapsule fabrication.
  • To establish a robust protocol for high-efficiency protein encapsulation in LbL microcapsules.

Main Methods:

  • Proteins were encapsulated within calcium carbonate (CaCO(3)) microparticles.
  • LbL assembly was used to coat the CaCO(3) cores with polyelectrolyte layers (dextran sulfate/poly-L-arginine).
  • CaCO(3) cores were dissolved using ethylenediaminetetraacetic acid (EDTA) to yield protein-loaded microcapsules.

Main Results:

  • Protein encapsulation efficiency was found to be highly dependent on protein charge and molecular weight.
  • The number of polyelectrolyte bilayers significantly impacted the final encapsulation efficiency.
  • Analysis of each fabrication step identified critical points for potential protein loss.

Conclusions:

  • The study provides insights into optimizing protein encapsulation in LbL microcapsules.
  • Protein characteristics and LbL parameters are key determinants of encapsulation efficiency.
  • This work contributes to the development of advanced protein delivery systems using microcapsule technology.