Characterization and cytocompatibility of an antibiotic/chitosan/cyclodextrins nanocoating on titanium implants

Area of Science:

• Biomaterials Science
• Nanotechnology
• Infectious Disease Research

Background:

• Post-operative infections are a significant complication in orthopedic surgery.
• Titanium implants are widely used but susceptible to bacterial colonization.
• Antibiotic-eluting coatings can prevent implant-associated infections.

Purpose of the Study:

• To develop and characterize a novel ciprofloxacin-loaded chitosan nanoparticle coating for titanium implants.
• To evaluate the in vitro antibacterial efficacy of the coating against Staphylococcus aureus.
• To assess the biocompatibility of the coating with osteoblast-like cells.

Main Methods:

• Ciprofloxacin-loaded chitosan nanoparticles were synthesized using cyclodextrin complexation.
• Nanoparticle characterization included Transmission Electron Microscopy (TEM), High-Performance Liquid Chromatography (HPLC), and X-ray Photoelectron Spectroscopy (XPS).
• In vitro antibacterial activity was tested against Staphylococcus aureus strains, and cell viability assays were performed on MG63 osteoblast-like cells.

Main Results:

• Nanoparticles exhibited sizes between 426-552 nm and a positive zeta potential of approximately +30 mV.
• The coating demonstrated significant in vitro inhibition of Staphylococcus aureus growth (approx. 20-fold reduction).
• No adverse effects on MG63 osteoblast-like cell viability, adhesion, or gene expression were observed at various time points.

Conclusions:

• The ciprofloxacin-loaded chitosan nanoparticle coating is a promising candidate for preventing orthopedic implant infections.
• The coating effectively inhibits bacterial growth while maintaining biocompatibility with bone cells.
• This novel approach offers a potential strategy for developing advanced antibiotic-eluting titanium implants.