Peptide-Functionalized Nanopillared Surfaces with Tunable Antimicrobial and Immunomodulatory Properties

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Nanotechnology

Background:

• Stimuli-responsive nanopatterned surfaces are crucial in biotechnology and biomedicine.
• Cicada wing-inspired surfaces offer unique hydrophilic and nanopillared structures.

Purpose of the Study:

• To develop antimicrobial and immunomodulatory materials with tunable properties.
• To combine bacterial capture/killing with immune activation using peptide-modified nanopillared surfaces.

Main Methods:

• Fabrication of nanopillared surfaces using poly-(methacrylic acid)-co-poly-(vinyl alcohol).
• Layer-by-layer deposition of cationic amphipathic peptides.
• Analysis of surface properties (hydrophilicity, nanopillar height) and peptide deposition.
• Assessment of antimicrobial activity and macrophage activation (Toll-like receptors).

Main Results:

• Peptide immobilization altered surface hydrophilicity and nanopillar height.
• Antimicrobial peptide deposition initially reduced antimicrobial efficacy but enhanced immunomodulatory properties.
• Peptide degradation in biological environments gradually restored antimicrobial activity and modulated immune response over time.

Conclusions:

• The developed peptide-modified nanopillared surfaces exhibit tunable antimicrobial and immunomodulatory properties.
• These regenerative materials show potential for applications in wound healing.
• The study highlights a novel approach for creating advanced biomaterials with dynamic functionalities.