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Evaluation of Antimicrobial Activities of Nanoparticles and Nanostructured Surfaces In Vitro
Published on: April 21, 2023
Decreased Staphylococcus epidermis adhesion and increased osteoblast functionality on antibiotic-loaded titania
Ketul C Popat1, Matthew Eltgroth, Thomas J Latempa
1Department of Physiology, Division of Bioengineering, University of California, 1700-4th Street, Box 2520, San Francisco, CA 94143-2520, USA.
Biomaterials
|August 19, 2007
Summary
Local antibiotic delivery using titania nanotubes effectively reduces bacterial adhesion after orthopedic surgery. This novel approach enhances osteoblast differentiation, offering a promising strategy against implant-associated infections.
Area of Science:
- Biomaterials Engineering
- Nanotechnology
- Orthopedic Surgery
Background:
- Bacterial infections pose a significant risk following orthopedic implant surgery, potentially leading to severe complications like osteomyelitis.
- Current systemic antibiotic therapies have drawbacks including toxicity and limited bioavailability at the implant site.
- Local antibiotic delivery is preferred to overcome systemic limitations and improve efficacy.
Purpose of the Study:
- To develop and evaluate titania nanotubular arrays for localized antibiotic delivery off-implant.
- To investigate the controlled release of gentamicin from fabricated titania nanotubes.
- To assess the impact of gentamicin-loaded nanotubes on bacterial adhesion and osteoblast cell functionality.
Main Methods:
- Titania nanotubular arrays were fabricated on bulk titanium using anodization techniques.
- Nanotubes with controlled dimensions (80 nm diameter, 400 nm length) were loaded with varying amounts of gentamicin (200, 400, 600 μg).
- Gentamicin release kinetics, effect on Staphylococcus epidermidis adhesion, and MC3T3-E1 preosteoblastic cell response were evaluated.
Main Results:
- Fabricated titania nanotubes were successfully loaded with gentamicin.
- Drug-eluting nanotubes significantly reduced Staphylococcus epidermidis adhesion on the implant surface.
- Enhanced osteoblast differentiation was observed on gentamicin-loaded nanotube surfaces.
Conclusions:
- Titania nanotubular arrays offer a viable platform for controlled local antibiotic delivery.
- This nanotechnology-based approach effectively combats bacterial adhesion and promotes bone cell function.
- The findings suggest a promising strategy for preventing orthopedic implant infections.
