About the Authors

Stefanie Wohlfart

Affiliation Institute of Pharmaceutical Technology, Goethe-University, Frankfurt, Germany

Alexander S. Khalansky

Affiliation Institute of Human Morphology, Moscow, Russia

Svetlana Gelperina

Affiliation Nanosystem Ltd., Moscow, Russia

Olga Maksimenko

Affiliation Nanosystem Ltd., Moscow, Russia

Christian Bernreuther

Affiliation Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany

Markus Glatzel

Affiliation Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany

Jörg Kreuter

Kreuter@em.uni-frankfurt.de

Affiliation Institute of Pharmaceutical Technology, Goethe-University, Frankfurt, Germany

Competing Interests

Although two of the authors (S.G. and O.M.) are employed by a commercial company (Nanosystem LTD.), no patent is pending and these particles are not in a commercial development. This does not alter the authors′ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SW ASK SG OM CB MG JK. Performed the experiments: SW ASK SG OM CB. Analyzed the data: SW ASK SG OM CB MG JK. Contributed reagents/materials/analysis tools: SW ASK SG OM CB. Wrote the paper: SW SG CB MG JK.