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Effect of insulin on glucagon secretion mediated via glucose metabolism of pancreatic a cells in ducks

Summary

A possible action of insulin via glucose metabolism on the pancreatic A cell response to glucose, was studied in ducks. 2-Deoxyglucose, a non metabolizable analogue of glucose was used. In normal ducks, the hyperglycaemia induced by 2-deoxyglucose (IV: 0.5g/kg) resulted in hyper glucagonaemia, while the same degree of hyper glycaemia, induced by glucose infusion (IV injection 25 mg/kg, and infusion 5 mg/kg/min) immediately suppressed glucagon secretion. In diabetic ducks, two days after subtotal pancreatectomy, glucose responsiveness of the A cell was abolished, but could be restored by insulin treatment before (IM 0.2 U/kg insulin + 8 μg/kg glucagon every 6 h) and during (IV 3.6 mU/kg + infusion 0.9 mU/kg/min) the glucose test (IV: 0.5 g /kg). The normal response of the A cell to glucose was not observed in diabetic insulintreated ducks after the administration of 2-deoxyglucose (IV: 0.5 g/kg). These data suggest an inhibitory effect of the metabolism of glucose on the release of glucagon. In addition, the action of insulin on the A cell may be mediated by its effect on glucose metabolism within the A cell.

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Laurent, F., Gross, R., Lakili, M. et al. Effect of insulin on glucagon secretion mediated via glucose metabolism of pancreatic a cells in ducks. Diabetologia 20, 72–77 (1981). https://doi.org/10.1007/BF00253821

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Key words

  • Glucose
  • insulin
  • glucagon
  • glucose metabolism
  • A cell
  • 2-deoxyglucose
  • subtotal pancreatectomy
  • ducks