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FEBS Lett. 1988 Nov 7;239(2):358-62.

Oscillations of cytosolic calcium in single pancreatic acinar cells stimulated by acetylcholine.

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Physiological Laboratory, University of Liverpool, England.


The changes in cytosolic free calcium concentration [( Ca2+]i) were monitored (fura-2) in single, isolated, mouse pancreatic acinar cells stimulated by acetylcholine (ACh). Responses to ACh at concentrations between 10(-7) and 5 x 10(-7) M are marked by the appearance of regular, sinusoidal, oscillations in [Ca2+]i. At 37 degrees C the oscillations are transient, being seen only in the initial rising phase of the calcium signal. At 30 degrees C regular oscillations can be maintained throughout the period of ACh application. This study reports that release of intracellular calcium and influx of extracellular calcium are both involved in the generation of these oscillatory calcium signals.

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