Mélanie C. Beauvois

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OBJECTIVE We studied how glucose and ATP-sensitive K(+) (K(ATP)) channel modulators affect alpha-cell [Ca(2+)](c). RESEARCH DESIGN AND METHODS GYY mice (expressing enhanced yellow fluorescent protein in alpha-cells) and NMRI mice were used. [Ca(2+)](c), the K(ATP) current (I(KATP), perforated mode) and cell metabolism [NAD(P)H fluorescence] were monitored(More)
Stimulatory concentrations of glucose induce two patterns of cytosolic Ca2+ concentration ([Ca2+]c) oscillations in mouse islets: simple or mixed. In the mixed pattern, rapid oscillations are superimposed on slow ones. In the present study, we examined the role of the membrane potential in the mixed pattern and the impact of this pattern on insulin release.(More)
Beauvois, Melanie C., Charafa Merezak, Jean-Christophe Jonas, Magalie A. Ravier, Jean-Claude Henquin, and Patrick Gilon. Glucose-induced mixed [Ca ]c oscillations in mouse -cells are controlled by the membrane potential and SERCA3 Ca -ATPase of the endoplasmic reticulum. Am J Physiol Cell Physiol 290: C1503–C1511, 2006. First published December 28, 2005;(More)
The contribution of Ca(2+) release from intracellular stores to the rise in the free cytosolic Ca(2+) concentration ([Ca(2+)](c)) triggered by Ca(2+) influx was investigated in mouse pancreatic beta-cells. Depolarization of beta-cells by 45 mm K(+) (in the presence of 15 mm glucose and 0.1 mm diazoxide) evoked two types of [Ca(2+)](c) responses: a monotonic(More)
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