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Cereceres S, Lan Z, Bryan L, Whitely M, Wilems T, Greer H, Alexander ER, Taylor RJ, Bernstein L, Cohen N, Whitfield-Cargile C, Cosgriff-Hernandez E. Bactericidal activity of 3D-printed hydrogel dressing loaded with gallium maltolate. APL Bioeng 2019; 3:026102. [PMID: 31123722 PMCID: PMC6506339 DOI: 10.1063/1.5088801] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/03/2019] [Indexed: 12/21/2022] Open
Abstract
Chronic wounds are projected to reach epidemic proportions worldwide because of the aging population and the increasing incidence of diabetes. Despite extensive research, infection remains one of the leading sources of complications in chronic wounds, resulting in improper healing, biofilm formation, and lower extremity amputation. To address the limitations of standard treatments, we have developed a hydrogel wound dressing with self-tuning moisture control that incorporates a novel antimicrobial agent to eliminate and prevent infection. 3D-printing of a hydrogel dressing with dual porosity resulted in a new dressing with greater flexibility, increased water uptake, and more rapid swelling than bulk hydrogel dressings. Additionally, gallium maltolate (GaM) was incorporated into the dressing to investigate the efficacy of this antimicrobial agent. Loading profiles, release kinetics, and the bactericidal activity against Staphylococcus aureus (including methicillin-resistant Staphylococcus aureus) of GaM were investigated in vitro to identify target profiles that supported infection control. Finally, GaM-loaded hydrogel dressings were evaluated in vivo, utilizing a murine splinted-wound model that was inoculated with S. aureus. In comparison to an untreated control, GaM dressings markedly reduced the wound bacterial load without compromising wound closure rates. Overall, this work demonstrates the utility of a 3D-printed hydrogel dressing as an antimicrobial dressing to control infection in chronic wounds.
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Affiliation(s)
- Stacy Cereceres
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, USA
| | - Ziyang Lan
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Laura Bryan
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Michael Whitely
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, USA
| | - Thomas Wilems
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Hunter Greer
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Ellen Ruth Alexander
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Robert J Taylor
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | | | - Noah Cohen
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Canaan Whitfield-Cargile
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
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