Using biosensors to detect the release of serotonin from taste buds during taste stimulation

Y J Huang, Y Maruyama, K S Lu, E Pereira, I Plonsky, J E Baur, D Wu, S D Roper
Archives Italiennes de Biologie 2005, 143 (2): 87-96
CHO cells transfected with high-affinity 5HT receptors were used to detect and identify the release of serotonin from taste buds. Taste cells release 5HT when depolarized or when stimulated with bitter, sweet, or sour tastants. Sour- and depolarization-evoked release of 5HT from taste buds is triggered by Ca2+ influx from the extracellular fluid. In contrast, bitter- and sweet-evoked release of 5HT is triggered by Ca2+ derived from intracellular stores.

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