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- W2006119914 abstract "Electrophysiological activities of neuronal networks can be recorded on microelectrode arrays (MEAs). This technique requires tight coupling between MEA-surfaces and cells. Therefore, this study investigated the interface between DRG neurons and MEA-surface materials after adsorption of neurite promoting proteins: laminin-111, fibronectin, L1Ig6 and poly-l-lysine. Moreover, substrate-induced effects on neuronal networks with time were analyzed. The thickness of adsorbed protein layers was found between approximately 1 nm for poly-l-lysine and approximately 80 nm for laminin-111 on platinum, gold and silicon nitride. The neuron-to-substrate interface was characterized by Scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and SEM after in situ focused-ion-beam milling demonstrating that the ventral cell membrane adhered inhomogeneously to laminin-111 or L1Ig6 surfaces. Tight areas of 20-30 nm and distant areas <1 microm alternated and even tightest areas did not correlate with the physical thickness of the protein layers. This study illustrates the difficulties to predict cell-to-material interfaces that contribute substantially to the success of in vitro or in vivo systems. Moreover, focused ion beam (FIB)/SEM is explored as a new technique to analyze such interfaces." @default.
- W2006119914 created "2016-06-24" @default.
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- W2006119914 date "2007-12-01" @default.
- W2006119914 modified "2023-09-27" @default.
- W2006119914 title "Molecular design and characterization of the neuron–microelectrode array interface" @default.
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- W2006119914 doi "https://doi.org/10.1016/j.biomaterials.2007.08.010" @default.
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