Modulation of Glutamate Generation in Mitochondria Affects Hormone Secretion in INS‐1E Beta Cells

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Abstract
The mitochondria play a pivotal role in regulating glucose induced insulin secretion in the pancreatic beta cell. We have recently demonstrated that glutamate derived from mitochondria participates directly in the stimulation of insulin exocytosis. In the present study, mitochondria isolated from the beta cell line INS1E generated glutamate when incubated with the tricarboxylic acid cycle intermediate succinate. The generation of glutamate correlated with stimulated mitochondrial activity monitored as oxygen consumption and was inhibited by the mitochondrial uncoupler carbonyl cyanide p

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