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- W2002241792 abstract "In intact rats 16 h of fasting reduced the plasma insulin response to i.v. stimulation with either glucose, tolbutamide or glibenclamide by 50–80 %, without affecting the extractable insulin content of the pancreas. In subsequent studies with the isolated perfused rat pancreas two distinct patterns of insulin release could be discerned during the secondary phase. In thefed state, glucose 1.5 mg/ml induced a more or less constant elevation of the insulin secretion rate over 30 min (type I). At glucose concentrations of 2 and 3 mg/ml the release pattern was characterized by progressively increasing secretion rates (type II pattern). Infusion of tolbutamide (0.2 mg/ml) lowered the threshold for glucose stimulation and induced both patterns of secretion at lower glucose concentrations.Fasting for 24 h caused a 70–80 % inhibition of insulin secretion per 30 min at glucose levels of 1.5 and 2 mg/ml. Decreased glucose sensitivity was indicated by a shift to the right of the entire dose-response curve for glucose and by reduced inhibition (30 %) at a glucose level of 3 mg/ml. The effect of tolbutamide was also strongly diminished. The percent inhibition of the response to tolbutamide at different levels of glucose showed a pattern of inhibition similar to that observed with glucose alone. These findings suggest that the glucose-dependent release mechanism is highly sensitive to relatively short periods of fasting." @default.
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- W2002241792 title "Effects of feeding and fasting on the insulin secretory response to glucose and sulfonylureas in intact rats and isolated perfused rat pancreas" @default.
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- W2002241792 doi "https://doi.org/10.1007/bf01221849" @default.
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