A role for calcium release-activated current (CRAC) in cholinergic modulation of electrical activity in pancreatic beta-cells

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Abstract

S. Bordin and colleagues have proposed that the depolarizing effects of acetylcholine and other muscarinic agonists on pancreatic beta-cells are mediated by a calcium release-activated current (CRAC). We support this hypothesis with additional data, and present a theoretical model which accounts for most known data on muscarinic effects. Additional phenomena, such as the biphasic responses of beta-cells to changes in glucose concentration and the depolarizing effects of the sarco-endoplasmic reticulum calcium ATPase pump poison thapsigargin, are also accounted for by our model. The ability of this single hypothesis, that CRAC is present in beta-cells, to explain so many phenomena motivates a more complete characterization of this current. © 1995, The Biophysical Society. All rights reserved.

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Bertram, R., Smolen, P., Sherman, A., Mears, D., Atwater, I., Martin, F., & Soria, B. (1995). A role for calcium release-activated current (CRAC) in cholinergic modulation of electrical activity in pancreatic beta-cells. Biophysical Journal, 68(6), 2323–2332. https://doi.org/10.1016/S0006-3495(95)80414-5

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