Cited by 52Wound Healing and TreatmentsElectrospun Nanofibers in Biomedical ApplicationsNanoparticles: synthesis and applications

Skin Tissue Engineering for the Infected Wound Site: Biodegradable PLA Nanofibers and a Novel Approach for Silver Ion Release Evaluated in a 3D Coculture System of Keratinocytes and Staphylococcus aureus

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Mohiti-Asli, Mahsa, Pourdeyhimi, Behnam, Loboa, Elizabeth G.·2014·Tissue Engineering Part C: Methods

Abstract

Wound infection presents a challenging and growing problem. With the increased prevalence and growth of multidrug-resistant bacteria, there is a mounting need to reduce and eliminate wound infections using methodologies that limit the ability of bacteria to evolve into further drug-resistant strains. A well-known strategy for combating bacterial infection and preventing wound sepsis is through the delivery of silver ions to the wound site. High surface area silver nanoparticles (AgNPs) allowing extensive silver ion release have therefore been explored in different wound dressings and/or skin substitutes. However, it has been recently shown that AgNPs can penetrate into the stratum corneum of skin or diffuse into the cellular plasma membrane, and may interfere with a variety of cellular mechanisms. The goal of this study was to introduce and evaluate a new type of high surface area metallic silver in the form of highly porous silver microparticles (AgMPs). Polylactic acid (PLA) nanofibers were successfully loaded with either highly porous AgMPs or AgNPs and the antimicrobial efficacy and cytotoxicity of the two silver-based wound dressings were assessed and compared. To better mimic the physiological environment in vivo where both human cells and bacteria are present, a novel coculture system combining human epidermal keratinocytes and Staphylococcus aureus bacteria was designed to simultaneously evaluate human skin cell cytotoxicity with antimicrobial efficacy in a three-dimensional environment. We found that highly porous AgMPs could be successfully incorporated in nanofibrous wound dressings, and exhibited comparable antimicrobial efficacy and cytotoxicity to AgNPs. Further, PLA nanofibers containing highly porous AgMPs exhibited steady silver ion release, at a greater rate of release, than nanofibers containing AgNPs. The replacement of AgNPs with the newly introduced AgMPs overcomes concerns regarding the use of nanoparticles and holds great promise as skin substitutes or wound dressings for infected wound sites.

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  • The scaffold did enable slow release of silver; however, toxicity to host cells was not reduced.

    “The scaffold did enable the slow release of silver; however, toxicity to host cells was not reduced 40 .”

    From Nanotechnology approaches for global infectious diseases (2021) · cites this paper as [40]

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  1. [4]Wright J.B., Hansen D.L., and Burrell R.E.The comparative efficacy of two antimicrobial barrier dressings: in-vitro examination of two controlled release of silver dressings. Wounds 10,179, 1998 [Google Scholar]

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Authors
Mohiti-Asli, M., Pourdeyhimi, B., & Loboa, E. G.
Affiliations
  • Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, North Carolina State University, Raleigh, North Carolina.
  • North Carolina State University (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
Loboa, Elizabeth G.
Venue
Tissue Engineering Part C: Methods
Published
2014-10
Volume
20
Issue
10
Pages
790-797
ISSN
  • 1937-3384 (ISSN-L)
  • 1937-3392
OpenAlex
W112470970
Cited by
52
References
35
Citations by year
2025: 2 · 2024: 7 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 3 · 2019: 6 · 2018: 4 · 2017: 5 · 2016: 11 · 2015: 5 · 2014: 1
FWCI
7.12
Type
journal article
Language
en
Open access
Locations
  • Tissue Engineering Part C Methods (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Science Foundation (1133427)
  • North Carolina Biotechnology Center
  • National Institutes of Health
  • National Institute of Biomedical Imaging and Bioengineering (R03EB008790)
  • National Institute of Dental and Craniofacial Research (T32DE007057)
  • Division of Chemical, Bioengineering, Environmental, and Transport Systems (1133427)
Topics
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Physical Sciences › Materials Science › Biomaterials › Electrospun Nanofibers in Biomedical Applications
  • Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
Keywords
wound infection, wound dressings, skin substitutes, polylactic acid nanofibers, silver nanoparticles, silver microparticles, silver ion release, antimicrobial efficacy, cytotoxicity, keratinocytes, Staphylococcus aureus, 3D coculture, multidrug-resistant bacteria
MeSH terms
Epidermal Cells, Biocompatible Materials, Cell Survival, DNA, Humans, Ions, Polyesters, Polymers, Silver, Skin, Staphylococcus aureus, Wound Infection, Keratinocytes, Porosity, Coculture Techniques, Lactic Acid, Tissue Engineering, Cell Proliferation, Tissue Scaffolds, Nanofibers

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