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Hydrogels with precisely nano-functionalized micro-topography for cell guidance

  • In vivo, cells encounter different physical and chemical signals in the extracellular matrix (ECM) which regulate their behavior. Examples of these signals are micro- and nanometer-sized features, the rigidity, and the chemical composition of the ECM. The study of cell responses to such cues is important to understand complex cell functions, some diseases, and is basis for the development of new biomaterials for applications in medical implants or regenerative medicine. Therefore, the development of new methods for surface modifications with controlled physical and chemical features is crucial. In this work, we report a new combination of micelle nanolithography (BCML) and soft micro-lithography, for the production of polyethylene glycol (PEG) hydrogels, with a micro-grooved surface and decoration with hexagonally precisely arranged gold nanoparticles (AU NPs). The Au-NPs are used for binding adhesive ligands in a well-defined density. First tests were performed by culturing human fibroblasts on the gels. Adhesion and alignment of the cells along the parallel grooves of the surface were investigated. The substrates could provide a new platform for studying cell contact guidance by micro structures, and may enable a more precise control of cell behavior by nanometrically controlled surface functionalization.

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Author of HS ReutlingenKemkemer, Ralf; Athanasopulu, Kiriaki
Publisher:de Gruyter
Place of publication:Berlin
Document Type:Article
Year of Publication:2014
Issue:s1 : Track A - Biomaterials and Biocompatibility
Page Number:4
First Page:S6
Last Page:S9
DDC classes:610 Medizin, Gesundheit
Open Access?:Ja
Licence (German):License Logo  Open Access