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Nicotine increases Fura-2 fluorescence in polarized HBECs. Intracellular Fura-2 levels were measured in polarized HBECs as an indicator of cytoplasmic Ca2+ levels. Data are shown as peak changes in Fura-2 emission. Nicotine and ATP were added at 100 μM. All n = 6/group. *p < 0.05.
