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Polymeric Microspheres/Cells/Extracellular Matrix Constructs Produced by Auto-Assembly for Bone Modular Tissue

Bartosz Mielan1, Daniela M Sousa2,3, Małgorzata Krok-Borkowicz1

  • 1Department of Biomaterials and Composites, Faculty of Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.

International Journal of Molecular Sciences
|August 7, 2021
PubMed
Summary
This summary is machine-generated.

This study developed polymer microspheres for modular tissue engineering, enhancing cell adhesion and osteogenic differentiation for bone tissue applications. These microsphere constructs serve as building blocks for larger engineered tissues.

Keywords:
cell adhesioncell carrierscell differentiationmicrospheresmodular tissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Modular tissue engineering (MTE) offers a bottom-up strategy for creating engineered tissues.
  • Developing microscale building blocks is crucial for assembling larger tissue constructs.

Purpose of the Study:

  • To create cell-populated polymer microspheres for bone MTE.
  • To evaluate the influence of surface coatings and culture media on cell behavior and osteogenic differentiation.

Main Methods:

  • Poly(L-lactide-co-glycolide) microspheres were fabricated and coated with poly-L-lysine (PLL) or collagen type I (COL).
  • Preosteoblast MC3T3-E1 cells were cultured on microspheres in different media (MEM, OSG, OSC).
  • Cell adhesion, proliferation, osteogenic differentiation, and extracellular matrix deposition were assessed.

Main Results:

  • PLL and COL coatings significantly enhanced MC3T3-E1 cell adhesion and growth.
  • Autologous assembly formed 3D microsphere/cell/extracellular matrix constructs with high alkaline phosphatase activity.
  • Enhanced cell growth, extracellular matrix deposition, and mineralization were observed in osteogenic medium, particularly on COL-coated microspheres.

Conclusions:

  • Developed a method for spontaneous formation of organoid-like microsphere-based cell/ECM constructs.
  • These constructs show potential as building blocks for bone modular tissue engineering.
  • Surface modification and optimized media are key for successful MTE applications.