Nanoparticle-Protein Interaction: Demystifying the Correlation between Protein Corona and Aggregation Phenomena.

Area of Science:

• Nanotechnology
• Biomaterials Science
• Analytical Chemistry

Background:

• Protein corona formation and nanoparticle aggregation are critical challenges in nanomedicine.
• Understanding these phenomena is essential for advancing targeted drug delivery and personalized nanomedicine.
• Current methods struggle to precisely differentiate between protein corona and aggregation.

Purpose of the Study:

• To develop and validate a multitechnique approach for distinguishing protein corona from nanoparticle aggregates.
• To characterize the formation of protein corona and aggregates under varying conditions.
• To provide a reliable method for quality control in nanomedicine research.

Main Methods:

• Utilized a combination of dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), and cryotransmission electron microscopy (cryo-TEM).
• Tested the methodology with model silica nanoparticles incubated with model proteins and biological proteomes (fetal bovine serum, human plasma).
• Investigated particle-protein interactions in buffers of varying ionic strengths to control interactions.

Main Results:

• Successfully differentiated between protein corona, small aggregates, and massive aggregation.
• Obtained reliable fractal information on nanoparticle aggregates.
• Demonstrated the method's efficacy across different protein sources and buffer conditions.

Conclusions:

• The presented multitechnique strategy reliably distinguishes protein corona from nanoparticle aggregation.
• This approach offers a robust platform for analyzing nanoparticle-biomolecule interactions.
• The methodology can be expanded for quality control of samples in biological testing and nanomedicine development.