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Related Experiment Video

Updated: Jun 26, 2026

Fabrication of Size-Controlled and Emulsion-Free Chitosan-Genipin Microgels for Tissue Engineering Applications
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Injectable chitosan-based hydrogels for cartilage tissue engineering.

R Jin1, L S Moreira Teixeira, P J Dijkstra

  • 1Department of Polymer Chemistry and Biomaterials, Institute for Biomedical Technology (BMTI), Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.

Biomaterials
|January 30, 2009
PubMed
Summary
This summary is machine-generated.

Biodegradable injectable chitosan hydrogels were created using modified chitosan polymers. These novel hydrogels demonstrate excellent solubility, rapid gelation, and support chondrocyte viability, showing promise for cartilage tissue engineering.

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Published on: October 26, 2016

Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Chitosan is a versatile biopolymer with potential in biomedical applications.
  • Developing injectable and biodegradable hydrogels is crucial for tissue regeneration.
  • Enhancing chitosan solubility and controlling its crosslinking are key challenges.

Purpose of the Study:

  • To synthesize water-soluble chitosan derivatives for injectable hydrogels.
  • To investigate enzymatic crosslinking of these derivatives using horseradish peroxidase (HRP).
  • To evaluate the properties and biocompatibility of the resulting hydrogels for cartilage tissue engineering.

Main Methods:

  • Chitosan was modified with glycolic acid (GA) and phloretic acid (PA) to create CH-GA/PA polymers.
  • Solubility of CH-GA/PA was assessed at various pH levels.
  • Enzymatic crosslinking was performed using HRP and H2O2, with gelation times measured.
  • Hydrogel degradation by lysozyme and chondrocyte viability in vitro were evaluated.

Main Results:

  • CH-GA43/PA10 derivatives exhibited good solubility up to pH 10.
  • Short gelation times (around 10 s at 3 wt%) were achieved with HRP/H2O2 crosslinking.
  • The hydrogels were readily degraded by lysozyme.
  • Chondrocytes cultured within the hydrogels remained viable and maintained their morphology after 2 weeks.

Conclusions:

  • Water-soluble chitosan-graft-glycolic acid and phloretic acid (CH-GA/PA) hydrogels can be formed via enzymatic crosslinking.
  • These hydrogels possess favorable properties including solubility, rapid gelation, biodegradability, and biocompatibility.
  • CH-GA/PA hydrogels show significant potential as artificial extracellular matrices for cartilage tissue engineering applications.