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Related Concept Videos

Phases of Wound Repair01:28

Phases of Wound Repair

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Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
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Nanoclay-Interface-Mediating Charge Redistribution for Effective Wound Healing.

Juan Liao1, Qianqian Liu1, Weimin Xie1

  • 1Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, China.

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|November 18, 2025
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This study introduces a novel nanoclay strategy to rapidly stop bleeding and kill bacteria in wounds. This dual-action wound therapeutic achieves fast clotting and sustained antimicrobial effects for improved healing.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Wound Healing

Background:

  • Achieving rapid hemostasis and sustained antimicrobial activity simultaneously is a significant challenge for wound therapeutics.
  • Current wound treatments often struggle to balance these two critical functions effectively.

Purpose of the Study:

  • To develop a novel wound therapeutic that integrates rapid hemostatic and sustained antimicrobial properties.
  • To investigate a nanoclay-interface-mediated charge redistribution strategy using montmorillonite (MMT) and an aggregation-induced-emission luminogen (AIEgen), TTPy.

Main Methods:

  • Hybridization of montmorillonite (MMT) with TTPy.
  • Molecular dynamics (MD) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) for interfacial analysis.
  • Density functional theory (DFT) to understand electronic interactions.
  • In vitro clotting assays and antimicrobial efficacy tests against Staphylococcus aureus.
  • In vivo wound closure studies.

Main Results:

  • MMT-TTPy hybridization resulted in Ca2+ enrichment via cation-π/electrostatic interactions.
  • TTPy downshifted the O 2p band, weakening Ca-O coordination and enhancing Ca2+ bioavailability.
  • Achieved a 90-second clotting time and eradicated Staphylococcus aureus via light-triggered reactive oxygen species.
  • In vivo studies showed 84.8% wound closure within 10 days, demonstrating synergistic fibrin formation and bacterial clearance.

Conclusions:

  • Interfacial charge redistribution is identified as the molecular mechanism behind the dual hemostatic and antimicrobial activity.
  • The MMT-TTPy hybrid material offers a promising dual-action therapeutic for advanced wound management.
  • This strategy provides a new avenue for designing multifunctional wound dressings.