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Accelerating Wound Healing through a Mechano-Electric Synergistic Conductive Hydrogel.

Yingying Nie1,2, Cewen Hu3, Xinyue Huang3

  • 1Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China.

ACS Applied Bio Materials
|May 27, 2025
PubMed
Summary

This study introduces advanced hydrogel wound dressings that use a mechano-electric effect for faster healing. The innovative material promotes rapid wound closure and tissue regeneration within 14 days.

Keywords:
antibacterialhydrogel wound dressingsmechano-electric synergypiezoelectricwound healing

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Achieving faster wound healing remains a significant clinical challenge.
  • Conventional hydrogel dressings have limitations in promoting rapid tissue regeneration.
  • Developing advanced wound care solutions is crucial for improving patient outcomes.

Purpose of the Study:

  • To develop an innovative hydrogel wound dressing utilizing the mechano-electric synergistic effect for accelerated wound healing.
  • To engineer a hydrogel incorporating piezoelectric zinc oxide nanoparticles (ZnO NPs) and conductive carbon nanotubes (CNTs) within a poly(N-isopropylacrylamide) (PNIPAM) matrix.
  • To evaluate the therapeutic potential of the engineered hydrogel for wound regeneration.

Main Methods:

  • Fabrication of a thermosensitive PNIPAM hydrogel matrix.
  • Incorporation of ZnO NPs and CNTs to create a mechano-electric synergistic effect.
  • Assessment of hydrogel properties including mechanical strength, swelling, antibacterial activity, biocompatibility, and biosafety.
  • Evaluation of wound healing efficacy in a 1 cm² wound model, monitoring closure time and therapeutic effects.

Main Results:

  • The engineered hydrogel exhibited enhanced mechanical strength, optimal swelling, and improved antibacterial activity.
  • Temperature-induced contraction of the hydrogel promoted wound closure.
  • The hydrogel generated stable bioelectric signals via the piezoelectric effect, stimulating fibroblast migration.
  • Significant wound healing, nearly complete closure of a 1 cm² wound within 14 days, was observed.
  • The hydrogel demonstrated anti-inflammatory effects, promoted cell migration, induced fibroblast differentiation, and enhanced angiogenesis.

Conclusions:

  • The developed hydrogel wound dressing effectively leverages the mechano-electric synergistic effect for accelerated wound healing.
  • The material's multifaceted therapeutic properties offer a significant advancement over conventional treatments.
  • This innovative hydrogel shows considerable promise for clinical applications in wound management and regenerative medicine.