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Theranostic gold-in-gold cage nanoparticles enable photothermal ablation and photoacoustic imaging in biofilm-associated infection models
- Source :
- Journal of Clinical Investigation. November 1, 2023, Vol. 133 Issue 21
- Publication Year :
- 2023
-
Abstract
- Biofilms are structured communities of microbial cells embedded in a self- produced matrix of extracellular polymeric substances. Biofilms are associated with many health issues in humans, including chronic wound infections and tooth decay. Current antimicrobials are often incapable of disrupting the polymeric biofilm matrix and reaching the bacteria within. Alternative approaches are needed. Here, we described a complex structure of a dextran- coated gold-in-gold cage nanoparticle that enabled photoacoustic and photothermal properties for biofilm detection and treatment. Activation of these nanoparticles with a near infrared laser could selectively detect and kill biofilm bacteria with precise spatial control and in a short timeframe. We observed a strong biocidal effect against both Streptococcus mutans and Staphylococcus aureus biofilms in mouse models of oral plaque and wound infections, respectively. These effects were over 100 times greater than those seen with chlorhexidine, a conventional antimicrobial agent. Moreover, this approach did not adversely affect surrounding tissues. We concluded that photothermal ablation using theranostic nanoparticles is a rapid, precise, and nontoxic method to detect and treat biofilm-associated infections.<br />Introduction Biofilms, communities of bacteria within an extracellular polymeric substance (EPS), are implicated in many chronic infections (1-3). Once biofilms are established, they are notoriously difficult to eradicate due to [...]
- Subjects :
- Dextran -- Casualties -- Health aspects
Bacteria -- Casualties -- Health aspects
Biocides -- Casualties -- Health aspects
Nanoparticles -- Casualties -- Health aspects
Dental caries -- Casualties -- Health aspects
Anti-infective agents -- Casualties -- Health aspects
Infection -- Health aspects -- Casualties
Staphylococcus aureus infections -- Casualties -- Health aspects
Health care industry
Subjects
Details
- Language :
- English
- ISSN :
- 00219738
- Volume :
- 133
- Issue :
- 21
- Database :
- Gale General OneFile
- Journal :
- Journal of Clinical Investigation
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.771908785
- Full Text :
- https://doi.org/10.1172/JCI168485