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The correct human brain function is dependent on the activity of non‐neuronal cells called astrocytes. The bioelectrical properties of astrocytes in vitro do not closely resemble those displayed in vivo and the former are incapable of generating action potential; thus, reliable approaches in vitro for noninvasive electrophysiological recording of astrocytes remain challenging for biomedical engineering. Here it is found that primary astrocytes grown on a device formed by a forest of randomly oriented gold coated‐silicon nanowires, resembling the complex structural and functional phenotype expressed by astrocytes in vivo. The device enables noninvasive extracellular recording of the slow‐frequency oscillations generated by differentiated astrocytes, while flat electrodes failed on recording signals from undifferentiated cells. Pathophysiological concentrations of extracellular potassium, occurring during epilepsy and …
Publication date: 
1 Apr 2020

Emanuela Saracino, Luca Maiolo, Davide Polese, M Semprini, Ana Isabel Borrachero‐Conejo, Jacopo Gasparetto, Stefano Murtagh, Margherita Sola, Lorenzo Tomasi, Francesco Valle, Luca Pazzini, Francesco Formaggio, Michela Chiappalone, Saber Hussain, Marco Caprini, Michele Muccini, Luigi Ambrosio, Guglielmo Fortunato, Roberto Zamboni, Annalisa Convertino, Valentina Benfenati

Biblio References: 
Volume: 4 Issue: 4 Pages: 1900264
Advanced biosystems