Université de Fribourg

Uptake and intracellular fate of peptide surface-functionalized silica hybrid magnetic nanoparticles in vitro

Digigow, Reinaldo G. ; Vanhecke, Dimitri ; Rothen-Rutishauser, Barbara ; Clift, Martin J.D. ; Petri-Fink, Alke

In: Particle & Particle Systems Characterization, 2015, vol. 32, no. 2, p. 188–196

Recently, the use of nanomaterials as intracellular targeting tools for theranostics has gained heightened interest. Despite the clear advantages posed by surface-functionalized nanoparticles (NPs) in this regard, limited understanding currently exists due to difficulties in reliably synthesizing NPs with surface functionalizations adequate for use in such applications, as well as the manner of...

Université de Fribourg

Uptake efficiency of surface modified gold nanoparticles does not correlate with functional changes and cytokine secretion in human dendritic cells in vitro

Fytianos, Kleanthis ; Rodriguez-Lorenzo, Laura ; Clift, Martin J.D. ; Blank, Fabian ; Vanhecke, Dimitri ; Garnier, Christophe von ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara

In: Nanomedicine: Nanotechnology, Biology and Medicine, 2015, vol. 11, no. 3, p. 633–644

Engineering nanoparticles (NPs) for immune modulation require a thorough understanding of their interaction(s) with cells. Gold NPs (AuNPs) were coated with polyethylene glycol (PEG), polyvinyl alcohol (PVA) or a mixture of both with either positive or negative surface charge to investigate uptake and cell response in monocyte-derived dendritic cells (MDDCs). Inductively coupled plasma optical...

Université de Fribourg

Human epithelial cells in vitro – Are they an advantageous tool to help understand the nanomaterial-biological barrier interaction?

Rothen-Rutishauser, Barbara ; Clift, Martin J.D. ; Jud, Corinne ; Fink, Alke ; Wick, Peter

In: Euro Nanotox Letters, 2012, vol. 4, no. 01, p. 1-20

The human body can be exposed to nanomaterials through a variety of different routes. As nanomaterials get in contact with the skin, the gastrointestinal tract, and the respiratory tract, these biological compartments are acting as barriers to the passage of nano-sized materials into the organism. These structural and functional barriers are provided by the epithelia serving as an interface...

Université de Fribourg

Amino covalent binding approach on iron oxide nanoparticle surface: toward biological applications

Griffete, Nébéwia ; Clift, Martin J.D. ; Lamouri, Aazdine ; Digigow, Reinaldo G. ; Mihut, Adriana M. ; Fink, Alke ; Rothen-Rutishauser, Barbara ; Dietsch, Hervé

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012, p. -

We report on the synthesis and the surface modification of different types of magnetic iron oxide particles by developing an original process based on diazonium salts chemistry. Particles were first coated with amino groups and then subjected to polyethylene glycol (PEG) surface modification. They were subsequently characterized by Transmission electron microscopy, infrared spectroscopy,...