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Active silver nanoparticles for wound healing.

Chiara Rigo1, Letizia Ferroni, Ilaria Tocco

  • 1Department of Molecular Sciences and Nanosystems, University Ca' Foscari, Santa Marta, Dorsoduro 2137, 30123 Venice, Italy. barbara.zavan@unipd.it.

International Journal of Molecular Sciences
|March 5, 2013
PubMed
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Silver nanoparticles (Ag NPs) in wound dressings show minimal cell toxicity, with Ag NPs localized in fibroblast cytoplasm. Deeper penetration was observed in unhealed burn tissue, supporting the safety of Ag NP-based wound treatments.

Area of Science:

  • Biomaterials Science
  • Wound Healing Research
  • Nanotechnology in Medicine

Background:

  • Silver nanoparticles (Ag NPs) are utilized in wound dressings for their antimicrobial properties.
  • Understanding the interaction of Ag NPs with human cells and tissue is crucial for assessing safety.
  • Acticoat™ Flex 3 is a silver nanoparticle-based dressing for wound care.

Purpose of the Study:

  • To investigate the in vitro and in vivo effects of silver nanoparticles (Ag NPs) from Acticoat™ Flex 3 on fibroblast cells.
  • To analyze the localization and distribution of Ag NPs within skin tissue.
  • To assess the safety profile of Ag NP-based dressings in wound treatment.

Main Methods:

  • In vitro study using 3D fibroblast cell cultures.
  • Application of Ag NP dressing to a partial thickness burn patient.

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  • Transmission electron microscopy (TEM) for ultrastructural analysis.
  • Inductively coupled plasma mass spectrometry (ICP-MS) for silver quantification.
  • Cellular staining for nuclear integrity assessment.

    • Main Results:

    • In vitro: Ag NPs reduced mitochondrial activity but maintained nuclear integrity and cell viability.
    • In vivo: Ag NPs were found as aggregates in fibroblast cytoplasm, with varying distribution in upper and lower dermis.
    • Ag NP penetration depth differed between healed (superficial) and unhealed (deeper) burn tissues.
    • Silver concentrations were quantified in both cell cultures and skin biopsies.

    Conclusions:

    • Silver nanoparticle release from Acticoat™ Flex 3 dressing does not induce cell death in fibroblasts.
    • Ag NP distribution and concentration in skin tissue are dependent on wound healing status.
    • The findings support the safety of Ag NP-based dressings for wound treatment, consistent with existing literature.