Sweet and bitter tastants specific detection by the taste cell-based sensor.

Sweet and bitter tastants specific detection by cell-based sensor is investigated in this paper. Human enteroendocrine NCI-H716 cells, expressing G protein-coupled receptors and sweet receptors (type 1, member 2/type 1, member 3), and human enteroendocrine STC-1 cells, expressing G protein-coupled receptors and bitter receptors (type 2 members) are used as sensing devices. The HEK-293 cells, without taste receptor expression, are used as negative control. The electrochemical impedance spectrum data is recorded and processed by bistable stochastic resonance for signal-to-noise ratio calculation. NCI-H716 cell-based sensor selectively responds to sweeteners and sweet tastant mixtures. STC-1 cell-based sensor selectively responds to bitter tastants and bitter tastant mixtures. The tastants species and concentrations can be decided by signal-to-noise ratio parameters. HEK-293 cell-based sensor lacks the tastants discriminating ability. The taste cell-based sensor is easy to prepare and operate. This work offers a useful way in gustatory mechanism research.

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