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Human bone tissue-derived ECM hydrogels: Controlling physicochemical, biochemical, and biological properties through

Yang-Hee Kim1, Gianluca Cidonio1,2,3, Janos M Kanczler1

  • 1Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, SO16 6YD, United Kingdom.

Bioactive Materials
|October 8, 2024
PubMed
Summary

Researchers developed novel human bone extracellular matrix (ECM) hydrogels for bone regeneration. Optimizing powder size and digestion time enhanced protein content and osteogenic differentiation, showing potential for bone repair applications.

Keywords:
DecellularizationDemineralizationExtracellular matrixHuman boneHydrogels

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Research

Background:

  • Decellularized tissues, particularly the extracellular matrix (ECM), are promising for tissue regeneration due to their inherent structural and compositional integrity.
  • Human bone ECM-derived materials are underexplored for regenerative applications.
  • Controlling the physiochemical and biological properties of ECM-derived hydrogels is crucial for optimizing their performance.

Purpose of the Study:

  • To investigate the impact of bone powder size and enzyme digestion time on the properties of human bone ECM hydrogels.
  • To evaluate the potential of these tailored ECM hydrogels for promoting osteogenic differentiation and bone regeneration.

Main Methods:

  • Human bone ECM was processed into hydrogels using varying bone powder sizes (45-250 μm, 250-1000 μm, 1000-2000 μm) and enzyme digestion times (3, 5, 7 days).
  • Physiochemical properties (protein concentration, gelation strength) and biological activity (osteogenic differentiation of human bone marrow-derived stromal cells - HBMSCs) were assessed.
  • Rheological properties were analyzed to determine gelation characteristics.

Main Results:

  • Reduced bone powder size and extended digestion time significantly increased protein concentration and diversity in ECM hydrogels.
  • Hydrogels derived from smaller bone powders (45-250 μm) and longer digestion times exhibited enhanced gelation strength.
  • HBMSCs cultured on optimized ECM hydrogels showed significantly improved osteogenic differentiation compared to controls, indicating enhanced biological activity.

Conclusions:

  • Modulating bone powder size and enzyme digestion time offers effective control over human bone ECM hydrogel properties.
  • These tailored hydrogels demonstrate significant potential as bioactive scaffolds for bone regeneration and repair.
  • The findings open new avenues for developing advanced biomaterials for orthopedic applications.