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Bactericidal activity of 3D-printed hydrogel dressing loaded with gallium maltolate.
Stacy Cereceres1, Ziyang Lan2, Laura Bryan3
1Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, USA.
APL Bioengineering
|May 25, 2019
Summary
This study introduces a 3D-printed hydrogel wound dressing with self-tuning moisture control and gallium maltolate (GaM) to combat chronic wound infections. The novel dressing effectively reduced bacterial load in vivo without hindering wound healing.
Area of Science:
- Biomaterials Science
- Infectious Diseases
- Regenerative Medicine
Background:
- Chronic wounds pose a significant global health challenge, exacerbated by aging populations and rising diabetes rates.
- Infection is a primary complication in chronic wounds, leading to delayed healing, biofilm formation, and potential amputation.
- Current treatments for chronic wound infections have limitations, necessitating innovative approaches.
Purpose of the Study:
- To develop and evaluate a novel 3D-printed hydrogel wound dressing with integrated antimicrobial properties for chronic wound infection management.
- To investigate the efficacy of gallium maltolate (GaM) as an antimicrobial agent within a hydrogel matrix.
- To assess the dressing's performance in controlling bacterial load and promoting wound healing in a preclinical model.
Main Methods:
- Fabrication of a dual-porosity hydrogel dressing using 3D-printing technology for enhanced physical properties.
- Incorporation and characterization of gallium maltolate (GaM) for antimicrobial activity, including loading profiles and release kinetics.
- In vitro assessment of GaM's bactericidal activity against Staphylococcus aureus (including MRSA).
- In vivo evaluation of GaM-loaded hydrogel dressings in a murine splinted-wound model inoculated with S. aureus.
Main Results:
- The 3D-printed hydrogel dressing exhibited improved flexibility, water uptake, and swelling compared to bulk hydrogels.
- Gallium maltolate demonstrated effective loading profiles and release kinetics suitable for sustained antimicrobial action.
- In vitro studies confirmed the bactericidal activity of GaM against Staphylococcus aureus strains.
- In vivo experiments showed a significant reduction in wound bacterial load with GaM-loaded dressings compared to controls, without compromising wound closure.
Conclusions:
- 3D-printed hydrogel dressings offer a promising platform for advanced wound care due to their tunable properties.
- Gallium maltolate is an effective antimicrobial agent for incorporation into wound dressings to combat chronic wound infections.
- This novel antimicrobial hydrogel dressing demonstrates significant potential for controlling infection and improving outcomes in chronic wounds.
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