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Real-time monitoring of Ca2+ concentration in pancreatic beta cells by a microfluidic device integrated with Total Internal Reflection (TIR)-based chip

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8 Author(s)

We present a microfluidic device integrated with a Total Internal Reflection (TIR)-based chip for cell observation and analysis, which enables Total Internal Reflection Fluorescence Microscopy (TIRFM). By integrating the microfluidic device with optical components, the assembly becomes unnecessary. An evanescent field generated by the TIR-based chip was demonstrated by observation of fluorescent beads and insulin granules in mouse pancreatic beta cells, MIN6-m9. Comparing with epi-fluorescence microscopy (EPIFM), high S/N ratio of 4-fold was realized by the TIR-based chip. To demonstrate the utility of the device integration, we analyzed intracellular Ca2+ concentration change in MIN6-m9 cells in response to KCl stimulation. We found out our integrated device realized quick perfusion for cell analysis with keeping high S/N ratio.

Published in:

Micro Electro Mechanical Systems (MEMS), 2011 IEEE 24th International Conference on

Date of Conference:

23-27 Jan. 2011