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Related Experiment Videos

Microsphere-based bioresorbable structures loaded with proteins for tissue regeneration applications.

Meital Zilberman1, Inbal Shraga

  • 1Department of Biomedical Engineering, Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel. meitalz@eng.tau.ac.il

Journal of Biomedical Materials Research. Part A
|August 3, 2006
PubMed
Summary

Novel bioresorbable composite fibers and microspheres were developed for tissue regeneration. Controlling formulation and processing conditions optimizes protein release for enhanced scaffold performance.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Developing advanced scaffolds for tissue regeneration requires controlled drug delivery systems.
  • Bioresorbable polymers offer promising platforms for creating functional tissue scaffolds.

Purpose of the Study:

  • To develop and characterize novel bioresorbable fiber/microsphere composite structures for controlled protein release.
  • To investigate the impact of formulation and processing on microsphere structure and protein release kinetics.

Main Methods:

  • Fabrication of composite fibers by coating poly(L-lactic acid) fibers with protein-loaded poly(DL-lactic-co-glycolic acid) microspheres.
  • Preparation of microspheres using a double emulsion technique, loaded with horseradish peroxidase (HRP).

Related Experiment Videos

  • Analysis of protein release profiles over 90 days under varying double emulsion conditions.

    • Main Results:

    • Protein release was primarily diffusion-controlled, not degradation-dependent.
    • Decreased emulsion mixing rate enhanced release profiles via matrix-like structures.
    • Initial burst release was mitigated by reducing internal phase volume/protein content or adding surfactant.

    Conclusions:

    • Formulation and processing parameters of the double emulsion technique critically influence microsphere structure and protein release.
    • Optimized fiber/microsphere composites demonstrate tunable protein release for tissue regeneration applications.
    • These structures hold potential as advanced scaffolds for regenerative medicine.