Abstract
To investigate the respective roles of topography and cell/cell interactions in the development of a guided neuronal network on an engineered surface, micropatterned PDMS substrates were generated with different microgrooves geometry and investigated for the influence of cell density on neurite outgrowth and alignment. Through this systematic investigation, using a human neuronal stem cell line, the rules of neuronal network development and guiding could be learned. The results show that when cell density is increased the influence on neuritic outgrowth and alignment is very different for the various grooves geometries. The data emphasized the competition, in neurite development, between physical cues brought by surface topographical features and cell to cell communications. These results can be of particular interest for designing functional neuronal networks with a controlled architecture.
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