Bacterial adhesion on honeycomb-structured poly(L-lactic acid) surface with ag nanoparticles

Area of Science:

• Biomaterials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Ordered porous polymeric materials are promising for biomaterial applications.
• Porous structures can enhance cell proliferation but also increase bacterial adhesion.
• Inhibiting bacterial retention is crucial for in vivo biomaterial safety.

Purpose of the Study:

• To assess bacterial adhesion on porous polymer films.
• To investigate strategies for inhibiting bacterial retention on biomaterials.
• To evaluate honeycomb-structured poly(L-lactic acid) (PLLA) films with silver (Ag) nanoparticles for anti-bacterial properties.

Main Methods:

• Fabrication of honeycomb-structured poly(L-lactic acid) (PLLA) films with silver (Ag) nanoparticles.
• Analysis of Ag+ release rates from Ag/PLLA films.
• In vitro comparison of bacterial adhesion (Staphylococcus aureus and Escherichia coli) on flat PLLA, flat Ag/PLLA, and honeycomb-structured Ag/PLLA films.

Main Results:

• Ag nanoparticles showed enhanced antibacterial activity in honeycomb-structured films compared to flat films.
• This enhanced activity was particularly significant against Escherichia coli.
• Honeycomb surface topography and increased Ag+ release contribute to anti-adhesion properties.
• Honeycomb-structured Ag/PLLA films exhibited no significant cytotoxicity.

Conclusions:

• Honeycomb-structured Ag/PLLA films offer an effective and safe strategy to reduce bacterial adhesion on porous polymer surfaces.
• The combination of surface topography and silver nanoparticles provides potent anti-adhesion properties.
• These findings support the use of Ag-decorated honeycomb PLLA films as safer biomaterials.