Understanding protein-nanoparticle interactions leading to protein corona formation: In vitro - in vivo correlation...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Biophysics

Background:

• Nanoparticles (NPs) acquire a biomolecular corona upon contact with biological fluids, altering their properties.
• Understanding protein-NP interactions is crucial for predicting NP behavior in vivo.

Purpose of the Study:

• To investigate the interaction between NPs of varying surface charges and key plasma proteins (hemoglobin, fetuin-A, albumin, transferrin).
• To determine how these interactions affect NP circulation time and conformational changes.
• To correlate in vitro findings with in vivo protein corona data.

Main Methods:

• Quartz crystal microbalance and fluorescence quenching were used to assess binding affinity.
• Circular dichroism spectroscopy was employed to evaluate protein conformational changes.
• In vitro experiments were compared with in vivo protein corona data.

Main Results:

• Electrostatic interactions were identified as the primary drivers of protein-NP binding.
• Higher binding affinity did not consistently correlate with significant protein structural alterations.
• In vitro studies provided insights comparable to in vivo observations.

Conclusions:

• Protein-NP interactions are largely governed by electrostatic forces.
• In vitro and single-protein studies offer valuable predictive insights for in vivo nanoparticle behavior.
• This research advances the understanding of protein corona formation for future NP applications.