Prevention the formation of biofilm on orthopedic implants by melittin thin layer on chitosan/bioactive glass/vancomycin coatings

Area of Science:

• Biomaterials Science
• Infectious Diseases
• Nanotechnology

Background:

• Bone implant infections caused by Methicillin-resistant Staphylococcus aureus (MRSA) and Vancomycin-resistant Staphylococcus aureus (VRSA) pose significant clinical challenges.
• Existing treatments often struggle to eradicate these resistant bacterial strains, leading to implant failure and complications.

Purpose of the Study:

• To investigate the synergistic antibacterial effects of Melittin and vancomycin in preventing MRSA and VRSA bone implant infections.
• To evaluate the efficacy of chitosan/bioactive glass nanoparticles/vancomycin composites coated with Melittin on titanium substrates.

Main Methods:

• Fabrication of chitosan/bioactive glass nanoparticles/vancomycin composite coatings on titanium substrates using casting.
• Application of Melittin coating via drop casting.
• Assessment of cell proliferation (MC3T3 cells) and antibacterial activity against planktonic and adherent MRSA and VRSA.

Main Results:

• Melittin demonstrated osteoinductive properties, promoting MC3T3 cell proliferation.
• Composite coatings containing both vancomycin and Melittin successfully eliminated both planktonic and adherent MRSA and VRSA.
• Coatings with only vancomycin or Melittin were insufficient to eradicate all VRSA bacteria.

Conclusions:

• The combined vancomycin and Melittin coating exhibits potent synergistic anti-infective properties against MRSA and VRSA.
• Chitosan/bioactive glass/vancomycin/Melittin coating represents a promising strategy for preventing bone implant infections in orthopedic applications.