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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their access...
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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...

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Related Experiment Video

Updated: Jun 25, 2026

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Microfluidic GelMA/Bone-Derived Extracellular Matrix Microgels for Enhanced Stem Cell-Based Bone Regeneration.

Sheng-Chang Luo1, Miao-Ting Li1, Yi-Cheng Wang1

  • 1Fujian Provincial Key Laboratory of Biochemical Technology & Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, PR China.

ACS Applied Bio Materials
|January 7, 2026
PubMed
Summary
This summary is machine-generated.

Engineered microgels using bone matrix and stem cells successfully repaired critical-sized bone defects. This biomimetic approach enhances bone regeneration by mimicking the natural bone microenvironment.

Keywords:
bone tissue engineeringdecellularized extracellular matrixgelatin methacrylateinjectable microgelmesenchymal stem cells

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Critical-sized bone defects present significant clinical challenges due to limited natural bone regeneration.
  • Current tissue engineering strategies using hydrogels and mesenchymal stem cells (MSCs) show promise but often lack the necessary biomimetic architecture.
  • Existing systems fail to replicate the hierarchical biochemical cues of native bone, hindering effective regeneration.

Purpose of the Study:

  • To engineer modular, cell-laden microgels for enhanced bone defect regeneration.
  • To create a biomimetic platform integrating bone-derived decellularized extracellular matrix (BdECM) within hydrogel networks.
  • To evaluate the efficacy of these microgels in promoting osteogenic differentiation and bone repair in vivo.

Main Methods:

  • Developed modular microgels (P-GE) by incorporating BdECM into gelatin methacrylate/polyethylene glycol diacrylate (GelMA/PEGDA) hydrogel networks.
  • Utilized microfluidic encapsulation and UV-induced cross-linking for microgel fabrication.
  • Assessed microgel structural integrity, injectability, and in vitro performance with rat bone marrow mesenchymal stem cells (BMSCs).
  • Evaluated in vivo bone regeneration in critical-sized calvarial defects.

Main Results:

  • Fabricated P-GE microgels demonstrated consistent structure, tunable injectability, and supported robust BMSC proliferation and osteogenic differentiation in vitro.
  • In vivo implantation led to near-complete calvarial defect repair.
  • Significant deposition of collagen and osteopontin was observed in the regenerated bone tissue.
  • The microenvironment promoted sustained cell infiltration, proliferation, and osteogenic differentiation.

Conclusions:

  • BdECM-based, cell-laden microgels represent an advanced biomimetic strategy for bone tissue engineering.
  • The engineered P-GE microgels provide a structurally and biologically optimized platform for regenerating critical-sized bone defects.
  • This approach facilitates efficient bone regeneration by mimicking native bone microenvironments.