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Hirn, S. ; Semmler-Behnke, M. ; Schleh, C. ; Wenk, A. ; Lipka, J. ; Schäffler, M. ; Takenaka, S. ; Möller, W. ; Schmid, G.* ; Simon, U.* ; Kreyling, W.G.

Particle size-dependent and surface charge-dependent biodistribution of gold nanoparticles after intravenous administration.

Eur. J. Pharm. Biopharm. 77, 407-416 (2011)
DOI PMC
Open Access Green: Postprint online available 12/2012
Gold nanoparticles (GNP) provide many opportunities in imaging, diagnostics, and therapies of nanomedicine. Hence, their biokinetics in the body are prerequisites for specific tailoring of nanomedicinal applications and for a comprehensive risk assessment. We administered (198)Au-radio-labelled monodisperse, negatively charged GNP of five different sizes (1.4, 5, 18, 80, and 200 nm) and 2.8 nm GNP with opposite surface charges by intravenous injection into rats. After 24h, the biodistribution of the GNP was quantitatively measured by gamma-spectrometry. The size and surface charge of GNP strongly determine the biodistribution. Most GNP accumulated in the liver increased from 50% of 1.4 nm GNP to >99% of 200 nm GNP. In contrast, there was little size-dependent accumulation of 18-200 nm GNP in most other organs. However, for GNP between 1.4 nm and 5 nm, the accumulation increased sharply with decreasing size; i.e. a linear increase with the volumetric specific surface area. The differently charged 2.8 nm GNP led to significantly different accumulations in several organs. We conclude that the alterations of accumulation in the various organs and tissues, depending on GNP size and surface charge, are mediated by dynamic protein binding and exchange. A better understanding of these mechanisms will improve drug delivery and dose estimates used in risk assessment.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Gold nanoparticles; Intravenous injection; Female Wistar-Kyoto rat; In vivo biodistribution; Nanoparticle size and surface charge; Hepato-biliary and renal clearance
ISSN (print) / ISBN 0939-6411
e-ISSN 0939-6411
Journal European Journal of Pharmaceutics and Biopharmaceutics
Quellenangaben Volume: 77, Issue: 3, Pages: 407-416 Article Number: , Supplement: ,
Publisher Elsevier
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Lung Biology (LHI)