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Dually crosslinked self-healing hydrogels originating from cell-enhanced effect.

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Introducing normal human dermal fibroblast (NHDF) cells into hydrogels enhances self-healing properties. This novel cell-loading strategy improves efficiency and accelerates healing for advanced wound dressings.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Hydrogels are versatile biomaterials with potential in regenerative medicine.
  • Improving the self-healing capacity of hydrogels is crucial for their long-term performance.
  • Existing hydrogels often lack sufficient mechanical integrity and rapid self-repair capabilities.

Purpose of the Study:

  • To develop a novel cell-loading strategy to enhance hydrogel self-healing properties.
  • To investigate the mechanism of dual crosslinking induced by cell secretions.
  • To evaluate the potential of these enhanced hydrogels as advanced wound dressings.

Main Methods:

  • Free-radical polymerization was used to prepare hydrogels.
  • Normal human dermal fibroblast (NHDF) cells were incorporated into the hydrogel matrix.
  • Hydrogen bonding interactions between cell secretions and polymer chains were analyzed.
  • Self-healing efficiency and rate were quantified.
  • Biocompatibility, antibacterial properties, and wound healing efficacy were assessed.

Main Results:

  • The cell-loading strategy resulted in dually crosslinked hydrogels via hydrogen bonding.
  • Self-healing efficiency increased from 73% to 92%.
  • The self-healing rate was accelerated by 12 times.
  • The hydrogels demonstrated excellent biocompatibility, antibacterial properties, and low toxicity.
  • The dually crosslinked hydrogels effectively expedited wound healing in preliminary assessments.

Conclusions:

  • Cell-loading with NHDF cells is an effective strategy to create dually crosslinked hydrogels with superior self-healing capabilities.
  • The hydrogen bonding interactions mediated by cell secretions are key to enhanced material properties.
  • These cell-loaded hydrogels show significant promise as advanced wound dressings for promoting tissue regeneration.
  • This approach provides a new pathway for designing smart biomaterials for diverse biomedical applications.