Stepwise pattern modification of neuronal network in photo-thermally-etched agarose architecture on multi-electrode array chip for individual-cell-based electrophysiological measurement
| Autor: | Yasuhiko Jimbo, Y. Sugio, Ikurou Suzuki, Kenji Yasuda |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Neurite Infrared Rays Biomedical Engineering Cell Culture Techniques Bioengineering Nanotechnology Biochemistry Hippocampus chemistry.chemical_compound Etching (microfabrication) Electrode array Biological neural network Neurites Animals Laser power scaling Cells Cultured Neurons business.industry Lasers Sepharose Signal Processing Computer-Assisted General Chemistry Equipment Design Microfluidic Analytical Techniques Chip Electric Stimulation Electrophysiology Microelectrode chemistry Optoelectronics Agarose Neural Networks Computer business Microelectrodes |
| Zdroj: | Lab on a chip. 5(3) |
| ISSN: | 1473-0197 |
| Popis: | We have developed a procedure for stepwise topographical control of network patterns and neurite connection directions between adjacent living neurons using an individual-cell-based on-chip multi-electrode array (MEA) cell cultivation system with an agarose microchamber (AMC) array. This procedure enables flexible and precise control of the cell positions and easy and flexible control of the pattern modification of connections between the cells in AMCs through stepwise photo-thermal etching in which a portion of the agarose layer on the chip is melted with a 1480 nm infrared laser beam even during cultivation. With adequate laser power and this stepwise procedure, we can fabricate narrow micrometer-order grooves (microchannels) during cultivation in a stepwise manner. Using this procedure, we controlled the direction of elongation of axons and dendrites selectively and confirmed the direction by immunostaining. We also demonstrated electrophysiological one-way transmission of signals among aligned hippocampal neurons in which the directions of the neurite connections were controlled using this stepwise photo-thermal etching procedure. These results demonstrate the potential of full direction control of neurite connections between neurons using stepwise photo-thermal etching to form microchannels one by one in an on-chip AMC/MEA cell cultivation system. We can thus better understand the meaning of neuronal network patterns and connection directions. |
| Databáze: | OpenAIRE |
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