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Related Concept Videos

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Related Experiment Video

Updated: Sep 2, 2025

Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts
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Multimodular vascularized bone construct comprised of vasculogenic and osteogenic microtissues.

Nicholas G Schott1, Huy Vu1, Jan P Stegemann1

  • 1Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA.

Biotechnology and Bioengineering
|August 4, 2022
PubMed
Summary

This study used a modular approach with microtissues to create bioengineered bone. Preculturing mesenchymal stromal cells (MSC) in specific microtissues promoted bone and blood vessel formation for enhanced healing.

Keywords:
bone tissue engineeringmesenchymal stromal cellsvascularization

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Area of Science:

  • Tissue Engineering
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Bioengineered bone requires both bone and vascular tissue development for successful healing of large defects.
  • Adult human mesenchymal stromal cells (MSC) possess osteogenic and vasculogenic potential, making them promising for bone regeneration.
  • A modular approach using microtissues can support tissue-specific functions and harness the dual differentiation capacity of MSC.

Purpose of the Study:

  • To develop a modular strategy for creating bioengineered bone constructs capable of simultaneous bone and vascular tissue formation.
  • To investigate the ability of precultured microtissues to support lineage commitment and promote desired tissue development.
  • To evaluate the efficacy of combining osteogenic and vasculogenic microtissues within a unified construct.

Main Methods:

  • Encapsulating mesenchymal stromal cells (MSC) in collagen-chitosan matrices to form osteogenic microtissues.
  • Encapsulating endothelial cells and MSC in fibrin matrices to form vasculogenic (VAS) microtissues.
  • Preculturing microtissues under specific differentiation conditions before combining them in a fibrin hydrogel.

Main Results:

  • Preculture successfully induced lineage commitment in microtissues, priming them for specific functions.
  • Osteogenic microtissues maintained their osteogenic activity even when cultured in vasculogenic medium.
  • Vasculogenic microtissues developed a pericyte-like phenotype and formed primitive vascular networks within the constructs.

Conclusions:

  • A modular approach using precultured microtissues effectively supports the dual differentiation potential of MSC.
  • This strategy enables the separate optimization of osteogenic and vasculogenic components within a single construct.
  • The developed method holds promise for creating advanced bioengineered bone with integrated vascularization for enhanced defect healing.