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Related Concept Videos

The Bone Matrix01:18

The Bone Matrix

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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Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
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Enzymatically crosslinked porous composite matrices for bone tissue regeneration.

Gianluca Ciardelli1, Piergiorgio Gentile, Valeria Chiono

  • 1Department of Mechanics, Politecnico in Turin, Corso Duca Degli Abruzzi 24, 10129 Turin, Italy.

Journal of Biomedical Materials Research. Part A
|January 24, 2009
PubMed
Summary

Enzymatic crosslinking of hydroxyapatite/collagen scaffolds enhanced mechanical strength and cell compatibility. These improved composite materials show promise for bone tissue engineering applications.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biotechnology

Background:

  • Hydroxyapatite/collagen (HA/Coll) composites are promising for bone regeneration.
  • Developing stable and biocompatible HA/Coll scaffolds is crucial for effective tissue engineering.
  • Current methods may not fully optimize mechanical properties and cellular integration.

Purpose of the Study:

  • To investigate the effect of enzymatic crosslinking using microbial transglutaminase (mTGase) on HA/Coll scaffolds.
  • To enhance the mechanical strength, thermal stability, and biocompatibility of HA/Coll scaffolds.
  • To evaluate the suitability of these modified scaffolds for bone tissue engineering.

Main Methods:

  • Fabrication of 3D porous HA/Coll composites via freeze-drying.
  • Enzymatic crosslinking of scaffolds using mTGase.
  • Characterization of scaffold properties: stability, swelling, degradation, thermal, mechanical, and cell compatibility (MG63 and HUVEC cells).

Main Results:

  • Enzymatic treatment significantly improved scaffold stability and mechanical strength.
  • Scaffold swelling ratio decreased with increasing HA content after crosslinking.
  • mTGase-crosslinked scaffolds exhibited low collagen release and good resistance to degradation.
  • Cell cultures demonstrated excellent adhesion, proliferation, viability, and differentiation on the scaffolds.

Conclusions:

  • Enzymatic crosslinking with mTGase is an effective method to enhance HA/Coll scaffold properties.
  • The modified scaffolds show improved stability, mechanical integrity, and excellent biocompatibility.
  • These advanced HA/Coll scaffolds hold significant potential for applications in bone tissue regeneration.