Cited by 154Nanoparticle-Based Drug DeliveryProtein Interaction Studies and Fluorescence AnalysisClay minerals and soil interactions

Cryptic Epitopes of Albumin Determine Mononuclear Phagocyte System Clearance of Nanomaterials

Mortimer, Gysell M., Butcher, Neville J., Musumeci, Anthony W., Deng, Zhou J., Martin, Darren J., Minchin, Rodney F.·2014·ACS Nano

Abstract

While plasma proteins can influence the physicochemical properties of nanoparticles, the adsorption of protein to the surface of nanomaterials can also alter the structure and function of the protein. Here, we show that plasma proteins form a hard corona around synthetic layered silicate nanoparticles (LSN) and that one of the principle proteins is serum albumin. The protein corona was required for recognition of the nanoparticles by scavenger receptors, a major receptor family associated with the mononuclear phagocyte system (MPS). Albumin alone could direct nanoparticle uptake by human macrophages, which involved class A but not class B scavenger receptors. Upon binding to LSN, albumin unfolded to reveal a cryptic epitope that could also be exposed by heat denaturation. This work provides an understanding of how albumin, and possibly other proteins, can promote nanomaterial recognition by the MPS without albumin requiring chemical modification for scavenger receptor recognition. These findings also demonstrate an additional function for albumin in vivo.

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Crossref · 10.1021/nn405830g

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  • When non-covalently adsorbed on nanoparticles with precisely designed supramolecular interaction, specific domains of proteins can interact with the nanoparticle surface in thermodynamically favorable manners, leading to colloidal stabilization and dysopsonization of particles in a physiological environment.

    “When non-covalently adsorbed on nanoparticles with precisely designed supramolecular interaction, specific domains of proteins can interact with the surface of nanoparticles in thermodynamically favorable manners, leading to the colloidal stabilization and dysopsonization of particles in a physiological environment35,36.”

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Authors
Mortimer, G. M., Butcher, N. J., Musumeci, A. W., Deng, Z. J., Martin, D. J., & Minchin, R. F.
Affiliations
The University of Queensland (AU)
Corresponding author
Minchin, Rodney F.
Venue
ACS Nano
Published
2014-03-27
Volume
8
Issue
4
Pages
3357-3366
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2046550789
Cited by
154
References
61
Citations by year
2026: 7 · 2025: 11 · 2024: 7 · 2023: 9 · 2022: 12 · 2021: 17 · 2020: 14 · 2019: 12 · 2018: 16 · 2017: 14 · 2016: 17 · 2015: 9 · 2014: 9
FWCI
6.19
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Nano (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Health and Medical Research Council (569694)
Topics
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
  • Physical Sciences › Materials Science › Biomaterials › Clay minerals and soil interactions
Keywords
serum albumin, protein corona, reticuloendothelial system, scavenger receptors, scavenger receptor A, nanoparticle clearance, cryptic epitopes, protein unfolding, macrophage uptake, nanoparticle-protein interactions
MeSH terms
Epitopes, Biological Transport, Cell Line, Humans, Macrophages, Models, Molecular, Protein Conformation, Serum Albumin, Silicates, Nanoparticles

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