The aim of our group is to acquire a mechanistic understanding on the interaction of particulate materials with biological barriers. In particular, we are interested in the correlation of physicochemical particle properties with barrier translocation and biological effects in order to support the safe design of particles and the development of novel particle-based therapeutic concepts.

The placental barrier is a key focus of the group considering the exceptional vulnerability of the developing conceptus and the substantial knowledge gap in this field of research. To obtain predictive results, we develop and use advanced human in vitro and ex vivo placental models, which take into account the unique structure/function and the particular microenvironment of the human placenta. Our expertise encompasses dual ex vivo placenta perfusion studies, perfused transwell systems, organotypic 3D microtissue models, isolation of primary cells (e.g. trophoblasts) as well as strong competences in working with particulate materials.

Development of advanced barrier models


We develop and use advanced in vitro and ex vivo models to address particle toxicity and translocation at biological barriers, in particular the human placenta. Importantly, we employ tissues or cells of human origin to circumvent uncertainties in extrapolation of animal data. Our strategies to improve the predictive value of the models include the use of primary cells, co-cultures, 3D models or the recreation of a dynamic microenvironment. This research received funding  from the 7th Framework Program of the European Comission (EC-FP7-MARINA-263215 and EC-FP7-NANOSOLUTIONS-309329) and the BMBF-project NanoUmwelt (03X0150).

Understanding particles-placenta interactions


Increasing the understanding if and how particle properties can be employed to steer particle barrier interaction and effects is a prerequisite for the development of safe and effective particle-based therapies to treat the mother, the fetus or placental disorders with reduced off-target effects. We aim to obtain new mechanistic insights into particle-barrier interactions using our advanced placental models, extensive material knowhow and access to state-of-the art analytics. This research is supported by funding from the Swiss National Science Foundation (31003A-179337) and received previous founding by the 7th Framework Program of the European Comission (EC-FP7-MARINA-263215 and EC-FP7-NANOSOLUTIONS-309329) and the BMBF-project NanoUmwelt (03X0150).


Graphene and graphene-related materials (GRM) exhibit enormous technological potential, especially in the field of electronics, photonics, optoelectronics and composites, but also for biomedical applications. Nevertheless, the GRM safety landscape is not fully explored yet. The aim of our activities within the Graphene flagship project is to obtain a systematic understanding of the impact of GRM on human cells and biological barriers with respect to the physicochemical properties of the materials. Current investigations focus on the air-blood barrier in the lungs, the intestinal barrier and the placental barrier. This research is supported by funding from European Union 7th Framework Program Graphene Flagship project (EU-Graphene Flagship n°604391), the EU Horizon2020 Framework Graphene Flagship project GrapheneCore1 (n°696656) and the Swiss National Science Foundation.

Dr. Tina Buerki-Thurnherr, Group Leader Particles@barriers

, +41 58 765 76 96

Alma Mater: ETH Zurich

Keywords: Nanotoxicology, Nanoparticle Translocation, Placenta, Advanced In Vitro Models, Primary Cell Culture


Savvina Chortarea, Postdoc

Alma Mater: University of Fribourg

Keywords: Realistic Nanosafety Assessment, Lung, Carbon Nanotubes, Gold Nanoparticles


Leonie Aengenheister, Postdoc

Alma Mater: ETH Zurich

Keywords: Advanced placenta models, Particles-Placenta interactions, Nanosafety


Pius Manser, Technical Expert

Keywords: Ex vivo Placenta Perfusion, Nanotoxicology, Cell Biology


Claudia Hempt, PhD Student

Alma Mater: ETH Zurich

Keywords: Advanced In Vitro Models, Nanotoxicology, Intestinal barrier


Daria Korejwo, PhD Student


Alma Mater: AMI Fribourg

Keywords: Nanosafety, Lung, Graphene


Woranan Netkueakul, PhD Student

Alma Mater: ETH Zurich

Keywords: Graphene-composites, Abrasion, Nanosafety, Lung


Lea Furer, PhD Student

Alma Mater: ETH Zurich

Keywords: Membranes, Electrospinning, Advanced co-culture models


Battuja Batbajar Dugershaw, PhD Student

Alma Mater: ETH Zurich

Keywords: Nanosafety, Indirect toxicity, Placental barrier


Ogul Chan Kuru, MSc Student





Dr. Leonie Aengenheister, PhD Student 2015-2018

Mr. Erminio Di Renzo, MSc Student 2017-2018

Dr. Melanie Kucki, Research Associate 2013-2017

Dr. Carina Muoth, PhD Student 2013-2016

Mr. Chasper Gmünder, Project student 2014

B. Fadeel, C. Bussy, S. Merino, E. Vázquez, E. Flahaut, F. Mouchet, L. Evairste, L. Gauthier, J. Koivisto, U. Vogel, C. Martín, LG. Delogu, T. Buerki-Thurnherr, P. Wick, D. Beloin-Saint-Pierre, R. Hischier, M. Pelin, CF. Carniel, M. Tretiach, F. Cesca, F. Benfenati, D. Scaini, L. Ballerini, K. Kostarelos, M. Prato, A. Bianco (2018). Safety Assessment of Graphene-Based Materials: Focus on Human Health and the Environment. ACS Nano DOI: 10.1021/acsnano.8b04758  

L. Aengenheister, D. Dietrich, A. Sadeghpour, P. Manser, L. Diener, A. Wichser, U. Karst, P. Wick, T. Buerki-Thurnherr (2018). Gold nanoparticle distribution in advanced in vitro and ex vivo human placental barrier models. J Nanobiotechnol (2018) 16:79.

T. Buerki-Thurnherr, K. Schaepper, L. Aengenheister, P. Wick (2018). Developmental toxicity of nanomaterials: Need for a better understanding of indirect effects. Chem. Res. Tox. 2018, 31 (8), 641-642.

T. Notter, L. Aengenheister, U. Stadlbauer-Weber, P. Wick, U. Meyer, T. Buerki-Thurnherr (2018). Prenatal exposure to TiO2 nanoparticles causes behavioral deficits relevant for autism-spectrum disorders and beyond. Transl. Psychiatry 2018 Sep 20;8(1):193.

M. Kucki, L. Aengenheister, L. Diener, A. Rippl, S. Vranic, L. Newman, E. Vazquez, K. Kostarelos, P. Wick, T. Buerki-Thurnherr (2018). Assessment of cell viability and functionality of human placental trophoblast cells in vitro after exposure to label-free graphene oxide. 2D Mater. 5, 035014

L. Aengenheister, K. Keevend, C. Muoth, R. Schönenberger, L. Diener, P. Wick, T. Buerki-Thurnherr (2018). An advanced human in vitro co-culture model for translocation studies across the human placental barrier. Sci Rep. 2018; 8 (1):5388

B. Drasler, M. Kucki, F. Delhaes, T. Buerki-Thurnherr, D. Vanhecke, D. Korejwo, A. Petri-Fink, B. Rothen-Rutishauser, P. Wick (2018). Single exposure to aerosolized graphene oxide and graphene nanoplatelets did not initiate an acute biological response in a 3D human lung model. Carbon, 137, 125-135

J. Vidmar, T. Buerki-Thurnherr, K. Loeschner (2018). Use of alkaline or enzymatic sample pre-treatment prior to characterization of silver nanoparticles in human tissue by single particle ICP-MS. J. Anal. At. Spectrom. 2018, 33, 752

M. Kucki, L. Diener, N. Bohmer, C. Hirsch, H.F. Krug, V. Palermo, P. Wick (2017). Uptake of label-free graphene oxide by Caco-2 cells is dependent on the cell differentiation status. J Nanobiotechology, 2017 Jun 21;15(1):46. doi: 10.1186/s12951-017-0280-7.

S. Chortarea, H. Barosova, MJD. Clift, P. Wick, A. Petri-Fink, B. Rothen-Rutishauser (2017). Human Asthmatic Bronchial Cells Are More Susceptible to Subchronic Repeated Exposures of Aerosolized Carbon Nanotubes At Occupationally Relevant Doses Than Healthy Cells. ACS Nano, 2017 May 23. doi: 10.1021/acsnano.7b01992.

C. Mouth, M. Grossgarten, U. Karst, J. A. Ruiz, D. Astruc, S. Moya, L. Diener, K. Grieder, A. Wichser, W. Jochum, P. Wick, T. Buerki-Thurnherr (2017). Impact of particle size and surface modification on the localization and penentration of gold nanoparticles in human placntal co-culture microtissues. Nanomedicine, 12(19), 1119-1133.

M. Kucki, P. Rupper, C. Sarrieu, M. Melucci, E. Treossi, A. Schwarz, V. León, A. Kraegeloh, E. Flahaut, E. Vázquez, V. Palermo, P. Wick  (2016) Interaction of graphene-related materials with human intestinal cells: an in vitro approach. Nanoscale, 8(16):8749-60.

C. Muoth, M. Rottmar, A. Schipanski, C. Gmuender, K. Maniura-Weber, P. Wick, T. Buerki-Thurnherr. (2016) A micropatterning approach to study the influence of actin cytoskeletal organization on polystyrene nanoparticle uptake by BeWo cells. RSC Advances, 6, 72827-72835.

C. Mouth, L. Aengenheister, M. Kucki, P. Wick, T. Buerki-Thurnherr (2016). Nanoparticle transport across the placental barrier: pushing the field forward! Nanomedicine, 11(8), 941-57. 

C. Muoth, A. Wichser, M. Monopoli, M. Correia, N. Ehrlich, K. Loeschner, A. Gallud, M. Kucki, L. Diener, P. Manser, W. Jochum, P. Wick, T. Buerki-Thurnherr (2016). A 3D co-culture microtissue model of the human placenta for nanotoxicity assessment. Nanoscale, 8, 17322-17332.

S. Grafmueller, P. Manser, L. Diener, L. Maurizi, PA. Diener, H. Hofmann, W. Jochum, H.F. Krug, T. Buerki-Thurnherr, U. von Mandach, P. Wick (2015). Transfer studies of polystyrene nanoparticles in the ex vivo human placenta perfusion model: key sources of artifacts. Sci. Technol. Adv. Mater. 16 (4) 044602.

S. Grafmueller, P. Manser, L. Diener, PA. Diener, X. Maeder-Althaus, L. Maurizi, W. Jochum, H.F. Krug, T. Buerki-Thurnherr, U. von Mandach, P. Wick (2015). Differential bidirectional transfer of polystyrene nanoparticles across the placental barrier reveals different transport kinetics. Environ Health Persp., 123(12), 1280-6.

S. Grafmueller, P. Manser, H.F. Krug, P. Wick, U. von Mandach (2013). Determination of the transport rate of xenobiotics and nanomaterials across the placenta using the ex vivo human placental perfusion model. J. Vis. Exp., (76), e50401, doi:10.3791/50401.

T. Buerki-Thurnherr, U. von Mandach, P. Wick (2012). Knocking at the door of the unborn child: Engineered nanoparticles at the human placenta barrier. Swiss Med Wkly., 2012;142:w13559.

P. Wick, A. Malek, P. Manser, D. Meili, X. Maeder-Althaus, L. Diener, PA. Diener, A. Zisch, H.F. Krug, U. von Mandach(2010). Barrier capacity of human placenta for nanosized materials. Environ Health Perspect., 118(3):432-6. Epub 2009 Nov 12.

P. Wick, A. E. Louw-Gaume, M. Kucki, H. F. Krug, K. Kostarelos, B. Fadeel, K. A. Dawson, A. Salvati, E. Vazquez, L. Ballerini, M. Tretiach, F. Benfenati, E. Flahaut, L. Gauthier, M. Prato, and A. Bianco (2014). Classification Framework for Graphene-Based Materials. Angewandte Chemie Int. Ed., 53, 7714 – 7718.

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