Coating based on chitosan/vancomycin nanoparticles: Patterns of formation in a water-carbon dioxide biphase system and in vivo stability
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View abstract on PubMed
Summary
This summary is machine-generated.This study developed vancomycin-doped chitosan nanoparticles for bioprosthetic heart valve coatings. The novel coatings effectively suppress S. aureus biofilm growth while preserving tissue integrity and showing controlled antibiotic release.
Area Of Science
- Biomaterials Science
- Nanotechnology
- Drug Delivery Systems
Background
- Bioprosthetic heart valves are susceptible to bacterial infections, particularly from Staphylococcus aureus.
- Chitosan nanoparticles offer a promising platform for drug delivery and antimicrobial coatings.
- Developing effective coatings that maintain tissue integrity and prevent biofilm formation is crucial.
Purpose Of The Study
- To investigate the formation of vancomycin-doped chitosan nanoparticles and their coatings on xenopericardial tissue.
- To evaluate the efficacy of these coatings in preventing Staphylococcus aureus biofilm formation.
- To assess the impact of the coating on the mechanical properties and biodegradation of the tissue.
Main Methods
- Radioactive indicators for nanoparticle yield and encapsulation efficiency.
- Spectrophotometry and high-resolution microscopy for coating characterization.
- Mechanical testing and histological analysis of coated tissues.
- In vivo biodegradation studies in a rat model.
Main Results
- Chitosan nanoparticles doped with vancomycin were successfully synthesized with high yield (~85%) and encapsulation efficiency (~30%).
- Coatings on xenopericardial tissue demonstrated complete coverage of collagen fibers with ~60 nm nanoparticles.
- The coatings preserved mechanical strength, completely suppressed S. aureus biofilm, and showed controlled vancomycin release upon acidification.
- Biodegradation studies indicated a slower degradation rate for vancomycin within the nanoparticles compared to chitosan.
Conclusions
- Vancomycin-doped chitosan nanoparticles form effective antimicrobial coatings for bioprosthetic heart valves.
- These coatings enhance tissue protection against S. aureus biofilm without compromising mechanical integrity.
- The controlled release and slower degradation of vancomycin contribute to sustained antimicrobial activity.
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