Functional enteroinsular axis in full-term newborn infants

Pediatric Research
K C KingS C Kalhan

Abstract

The term "enteroinsular axis" refers to the enhancement of insulin release by hormones secreted from the gut. Gastric inhibitory polypeptide (GIP) is one of the major hormones that mediates this function. The purpose of the present study was to examine whether the enteroinsular axis is functional in newborn infants born at term gestation. Between d 2 and d 4 of life, glucose was infused for 2 h intravenously or orogastrically to 44 fullterm newborn infants, of whom 18 were appropriate for gestational age, nine large for gestational age, eight small for gestational age; nine infants were born to diabetic mothers. Glucose was infused at either 8 mg/kg/min intravenously or 16 mg/kg/min orogastrically to achieve similar plasma glucose concentrations. Plasma insulin and GIP concentrations were compared. Plasma GIP concentration increased significantly with enteral glucose administration in all infants but remained unchanged with parenteral glucose infusion. The responses of plasma insulin and the insulin/glucose ratio were significantly greater in infants receiving enterally than parenterally infused glucose. However, when glucose was infused orogastrically at a lower rate (8 mg/kg/min), plasma GIP concentrations rose, but no enhanc...Continue Reading

Citations

Feb 27, 2018·Journal of Pediatric Gastroenterology and Nutrition·Anna C TottmanJane M Alsweiler

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