An agar-based on-chip neural-cell-cultivation system for stepwise control of network pattern generation during cultivation

Yoshihiro Sugio, Kensuke Komjima, Hiroyuki Moriguchi, Kazunori Takahashi, Kenji Yasuda

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We have developed a new type of single-cell based on-chip cell-cultivation system with an agarose microchamber (AMC) array and a photo-thermal etching module for step-by-step topographical control of the network patterns of living neural cells during long-term cultivation. The advantages of this system are that (1) it can control positions and numbers of cells for cultivation by using agar-based microchambers, and (2) it can change the neural network complexity during cultivation by photo-thermal melting a portion of agar at the focal point of a 1064nm infrared laser beam. This laser wavelength is permeable with respect to water and agarose, and it is only absorbed at the thin chromium layer on the chromium-coated glass slide surface at the bottom of the agarose layer. With adequate laser power, we can easily fabricate narrow tunnel-shaped channels between the microchambers at the bottom of the agar layer without the complicated steps conventional microfabrication processes entail even during cultivation; we demonstrated that rat hippocampal cells in two adjacent chambers formed fiber connections through new connections between chambers after these had been photo-thermally fabricated. We also verified the fiber connection between those cells by using calcium-based fluorescent microscopy. These results indicate that this system can potentially be used for studying the complexity of neural network patterns for epigenetic memorization.

Original languageEnglish
Pages (from-to)156-162
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume99
Issue number1
DOIs
Publication statusPublished - 2004 Apr 15
Externally publishedYes

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Keywords

  • Agar microchamber
  • Change of structure
  • Neural network pattern
  • On-chip culture system
  • Photo-thermal etching

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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