Abstract
A new planar-type ion channel biosensor with the function of cell culture has been fabricated using silicon on an insulator substrate as the sensor chip material. Coating of the sensor chip with fibronectin was essentially important for cell incubation on the chip. Although the seal resistance was quite low (∼7 MΩ) compared with the pipette patch-clamp gigaohm seal, the whole-cell channel current of the transient receptor potential vanilloid type 1 (TRPV1) channel expressing HEK293 cells was successfully observed, with a good signal-to-noise ratio, using capsaicin as a ligand molecule.

A new planer type ion channel biosensor with function of cell culture is fabricated using the silicon on insulator substrate as the sensor chip material. The coating of the sensor chip by the fibronectin was essentially important for the cell incubation on the chip. Whole cell channel current of TRPV1 channel was successfully observed using capsaicin as a ligand molecule with good signal to noise.








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Acknowledgements
This work was partly supported by NINS Cooperative Project Bio-molecular Sensor, and Grants-in-Aid for Scientific Research, Basic research (A) and Priority Area “Life Surveyor” promoted by the Ministry of Education, Culture, Sports, Science and Technology, Japan.
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Urisu, T., Asano, T., Zhang, Z. et al. Incubation type Si-based planar ion channel biosensor. Anal Bioanal Chem 391, 2703–2709 (2008). https://doi.org/10.1007/s00216-008-1994-z
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DOI: https://doi.org/10.1007/s00216-008-1994-z

