title: Influence of gestational age on serum incretin levels in preterm infants.
abstract: Glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) are the incretin hormones secreted from the intestine in response to enteral feeding to stimulate insulin secretion. We investigated the relationship serum GIP and GLP-1 levels with gestational age, and insulin secretion in preterm infants. Serum GIP and GLP-1 levels were measured at birth and at 1, 2 and 4 weeks after birth in 30 infants, including 12 born before 30th week of gestation (early group) and 18 born after 30th week of gestation (late group). Blood glucose and serum insulin levels were measured, and the quantitative insulin sensitivity check index (QUICKI) was also calculated. The levels of GLP-1 at 2 and 4 weeks were significantly higher in the early group than those in the late group. The levels of GIP were not significantly different between two groups. At 4 weeks, serum insulin level was significantly higher and QUICKI was significantly lower in the early group. Furthermore, GLP-1 levels were significantly correlated with QUICKI and the serum insulin levels in all infants at 4 weeks. In preterm infants, enteral feeding to premature intestine may be associated with GLP-1 secretion. GLP-1 is also related to stimulated insulin secretion in early postnatal period.
authors.affiliation: 1Department of Pediatrics and Adolescent Medicine,Juntendo University Graduate School of Medicine,Tokyo,Japan.
authors.forename: H
authors.initials: H
authors.lastname: Shoji
authors.affiliation: 2Department of Pediatrics,Juntendo University Faculty of Medicine,Tokyo,Japan.
authors.forename: A
authors.initials: A
authors.lastname: Watanabe
authors.affiliation: 2Department of Pediatrics,Juntendo University Faculty of Medicine,Tokyo,Japan.
authors.forename: N
authors.initials: N
authors.lastname: Ikeda
authors.affiliation: 2Department of Pediatrics,Juntendo University Faculty of Medicine,Tokyo,Japan.
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.affiliation: 2Department of Pediatrics,Juntendo University Faculty of Medicine,Tokyo,Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kitamura
authors.affiliation: 2Department of Pediatrics,Juntendo University Faculty of Medicine,Tokyo,Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hisata
authors.affiliation: 1Department of Pediatrics and Adolescent Medicine,Juntendo University Graduate School of Medicine,Tokyo,Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000378:metabolism*; D005260:Female; D005749:Gastric Inhibitory Polypeptide / Q000097:blood; D005865:Gestational Age; D052216:Glucagon-Like Peptide 1 / Q000097:blood; D006801:Humans; D054795:Incretins / Q000097:blood*; D007231:Infant, Newborn; D007234:Infant, Premature / Q000378:metabolism*; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance; D008297:Male; D010865:Pilot Projects
chemical_list: D001786:Blood Glucose; D054795:Incretins; D007328:Insulin; D005749:Gastric Inhibitory Polypeptide; D052216:Glucagon-Like Peptide 1
keywords: glucagon-like peptide-1; glucose-dependent insulinotropic polypeptide; incretin; insulin; preterm infants