Short elastin-like peptide-functionalized gold nanoparticles that are temperature responsive under near-physiological...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Elastin-like peptides (ELPs) are stimuli-responsive biopolymers with tunable properties.
• Functionalizing nanoparticles with peptides offers new avenues for targeted drug delivery and diagnostics.
• Controlling nanoparticle aggregation is crucial for developing advanced nanomaterials.

Purpose of the Study:

• To synthesize and characterize thermally-responsive elastin-like peptides (ELPs).
• To functionalize gold nanoparticles (GNPs) with thiol-capped ELPs.
• To investigate the thermally-triggered aggregation behavior of ELP-GNP conjugates.

Main Methods:

• Solid-phase synthesis of ELPs with varying N-terminal functional groups.
• UV-vis spectroscopy and circular dichroism (CD) for conformational analysis.
• Transmission electron microscopy (TEM) to study nanoparticle aggregation.

Main Results:

• ELPs exhibited pH-dependent conformational and aggregation properties.
• Thiol-capped ELPs successfully functionalized gold nanoparticles (GNPs).
• ELP-GNP conjugates demonstrated reversible aggregation at 40 °C and pH 7.4.

Conclusions:

• ELP-GNP conjugates display thermally-triggered reversible aggregation near physiological conditions.
• These responsive nanomaterials hold promise for applications in photothermal cancer therapy.
• The study highlights the potential of peptide-functionalized nanoparticles in biomedical applications.