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Injectable In Situ Photocrosslinked Hydrogel Dressing for Infected Wound Healing.

Jiaxu Zhang1, Huifeng Dong1, Xizhuo Jing1

  • 1Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.

ACS Applied Bio Materials
|May 1, 2023
PubMed
Summary

This study developed an injectable hydrogel dressing that rapidly cures without toxic chemicals. The advanced wound dressing offers antibacterial, photothermal, and sensory properties for accelerated healing and skin function restoration.

Keywords:
hydrogel dressingin situ photocrosslinkedinjectablemultifunctional sensorwound healing

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Wound Healing Research

Background:

  • Traditional injectable hydrogels face challenges like residual photoinitiators, toxic crosslinkers, slow curing, and complex preparation.
  • Existing hydrogels lack the ability to restore skin sensory function during wound healing.

Purpose of the Study:

  • To develop an injectable, rapidly *in situ* curing photocrosslinked hydrogel without photoinitiators.
  • To create a wound dressing with antibacterial, photothermal, and sensory properties for enhanced skin repair.

Main Methods:

  • Synthesized an injectable hydrogel using oxidized sodium alginate and photosensitive polyvinyl alcohol bearing styrylpyridinium group (PVA-SBQ).
  • Incorporated biomass-like polydopamine particles for photothermal therapy.
  • Evaluated antibacterial efficacy, wound healing rate, and sensory properties.

Main Results:

  • Achieved rapid *in situ* photocuring without photoinitiators.
  • Demonstrated high antibacterial rates: 99.56% against *Escherichia coli* and 97.96% against *Staphylococcus aureus*.
  • Showcased a 96.45% wound healing rate after 14 days and sensitive, stable sensing properties.

Conclusions:

  • The developed hydrogel dressing offers a promising alternative to traditional treatments, overcoming limitations of previous injectable hydrogels.
  • The material effectively promotes infected wound repair and shows potential for restoring skin sensory function.
  • This work presents a novel strategy for designing advanced injectable photocrosslinked hydrogel dressings.