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Distinguishing Protein Corona from Nanoparticle Aggregate Formation in Complex Biological Media Using X-ray Photon

Caroline E P Silva¹, Agustin S Picco², Flavia Elisa Galdino¹

¹Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy & Materials (CNPEM), Campinas, Sao Paulo 13083-970, Brazil.

|October 3, 2024

Summary

X-ray photon correlation spectroscopy (XPCS) reveals silica nanoparticles (SiO2) exhibit consistent Brownian motion in complex biological fluids. This technique offers real-time analysis, overcoming limitations of traditional methods for nanomedicine applications.

Keywords:

Aggregation Protein Corona Silica Nanoparticles X-ray Photon Correlation Spectroscopy (XPCS)

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Area of Science:

Nanomedicine
Colloid Science
Biophysics

Background:

Nanoparticles interact with biomolecules in biological systems, leading to protein corona formation and potential aggregation.
Understanding nanoparticle behavior in biological fluids is crucial for nanomedicine.
Conventional methods struggle to analyze nanoparticles in complex biological media.

Purpose of the Study:

To investigate the behavior of silica nanoparticles (SiO2) in diverse biological environments using X-ray photon correlation spectroscopy (XPCS).
To assess the impact of biological media complexity and protein corona formation on nanoparticle dynamics.
To demonstrate the capabilities of XPCS for real-time nanoparticle analysis.

Main Methods:

Application of X-ray photon correlation spectroscopy (XPCS) to study silica nanoparticles (SiO2).
Investigation across a range of biological media, from low to high complexity.
Tailoring nanoparticle surface and media composition to differentiate between corona-free systems and protein corona/aggregate formation.

Main Results:

Silica nanoparticles (SiO2) consistently exhibited Brownian motion, regardless of the biological media's complexity.
Differences in nanoparticle behavior were observed based on surface modification and media composition, distinguishing corona-free from protein-coated systems.
XPCS provided real-time insights into nanoparticle dynamics in complex biological environments.

Conclusions:

XPCS is a powerful technique for real-time nanoparticle analysis in biological media.
The study overcomes limitations of traditional methods for characterizing nanoparticle behavior in complex biological systems.
Findings offer deeper insights into colloidal behavior and protein corona formation for nanomedicine applications.