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- W2048777988 abstract "To investigate the mechanism whereby changes in plasma glucose level alter human pancreatic A-cell activity in vivo, A-cell activity was determined during manipulation of plasma glucose and pancreatic B-cell activity by insulin and glucose infusions. A-cell activity (the acute immunoreactive glucagon response to intravenous arginine, 0–10 min) rose from 482±125 to 968±191 pg · ml-1 · 10 min-1 (mean±SEM) when the plasma C-peptide level (a measure of B-cell activity) was suppressed from 2164±365 to 872±162 pg/ml by an insulin infusion at euglycaemia (employing the glucose clamp technique) in six normal subjects. Raising plasma glucose to 6.7 mmol/l during the same insulin infusion returned mean C-peptide (2688±581 pg/ml) and the acute glucagon response to arginine (447±146 pg · ml-1 · 10 min-1) close to basal levels. Individual changes in the acute glucagon response to arginine followed the C-peptide changes. The mean change in the acute glucagon response to arginine per unit change in plasma glucose (-191±36) was similar to that seen when plasma glucose was raised to twice basal levels in six different subjects without an insulin infusion (-159±45). This suggests that, when plasma glucose is raised to about twice basal level in vivo, the major factor in suppressing A-cell activity is the concurrent change in B-cell activity rather than direct effects of glucose or circulating insulin on the A cell." @default.
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- W2048777988 date "1984-03-01" @default.
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- W2048777988 title "How does glucose regulate the human pancreatic A cell in vivo?" @default.
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- W2048777988 doi "https://doi.org/10.1007/bf00252408" @default.
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