Important questions remain concerning how elevated blood glucose levels are coupled to insulin secretion from pancreatic beta cells and how this process is impaired in type 2 diabetes. Glucose uptake and metabolism in beta cells cause the intracellular Ca(2+) concentration ([Ca(2+)](i)) to increase to a degree necessary and sufficient for triggering insulin release. Although both Ca(2+) influx and Ca(2+) release from internal stores are critical, the roles of inositol 1,4,5-trisphosphate (IP(...Expand abstract
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NAADP: a new second messenger for glucose-induced Ca2+ responses in clonal pancreatic beta cells.
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