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Related Experiment Video

Updated: May 21, 2026

Synthesis of Thermogelling Poly(N-isopropylacrylamide)-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering
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Injectable in situ physically and chemically crosslinkable gellan hydrogel.

Hongwei Du1, Paul Hamilton, Mattew Reilly

  • 1Department of Surgery and Medical Research, Veteran Affairs Medical Center, St. Louis, MO 63106, USA. hdu0228@gmail.com

Macromolecular Bioscience
|June 19, 2012
PubMed
Summary

Researchers developed a new injectable gellan hydrogel using thiolation. This modified gellan hydrogel offers improved properties like lower gelling temperature and stable crosslinking for biomedical applications.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Injectable hydrogels are crucial for minimally invasive biomedical applications.
  • Gellan gum hydrogels offer biocompatibility but require modifications for enhanced properties.
  • Developing in situ crosslinkable hydrogels with tunable properties remains a challenge.

Purpose of the Study:

  • To synthesize an injectable, in situ physically and chemically crosslinkable gellan hydrogel.
  • To investigate the effect of thiolation on gellan gum's properties and hydrogel formation.
  • To evaluate the potential of the modified hydrogel for biomedical applications.

Main Methods:

  • Gellan gum thiolation was performed.
  • Synthesized hydrogels were characterized using techniques including (1)H NMR, FT-IR, CD, and rheology.
  • Injectability and in vitro cell viability (tissue culture) were assessed.

Main Results:

  • Thiolation of gellan gum did not alter its native 3-D conformation.
  • The modified hydrogel exhibited a lower phase transition temperature under physiological conditions.
  • Stable chemical crosslinking, ease of injection, rapid gelation, and excellent cell viability were observed.

Conclusions:

  • Thiolated gellan hydrogels demonstrate tunable properties and stable crosslinking.
  • The hydrogel's injectability, rapid gelation, and biocompatibility make it suitable for biomedical use.
  • This novel injectable hydrogel shows significant promise in regenerative medicine and bioengineering.