title: Long-term effects on pancreatic function of feeding a HC formula to rats during the preweaning period.
abstract: We have investigated pancreatic changes associated with hyperinsulinemia and an insulin secretory response to an oral glucose load in a new rat model for obesity. Male Sprague-Dawley pups were reared on a high-carbohydrate (HC) or high-fat (HF) formula by gastrostomy during the suckling period and were weaned onto a stock diet. These animals remained either nutritionally unchallenged or challenged with a high-sucrose diet during the postweaning period. The HC formula-fed animals showed increased insulin concentrations in the plasma and pancreas and also showed impaired insulin secretory response compared with mother-fed control or HF animals in adult life. Immunocytochemical and morphometric studies revealed that hyperinsulinemia in the HC animals during the preweaning period and also in adult life was associated with hypertrophy of beta-cells in the pancreas. The results show that consumption of a HC formula during the suckling period influences pancreatic islet morphology resulting in hyperinsulinemia which eventually leads to the development of obesity later in adult life.
authors.affiliation: Department of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106.
authors.forename: S
authors.initials: S
authors.lastname: Vadlamudi
authors.forename: B K
authors.initials: BK
authors.lastname: Hiremagalur
authors.forename: L
authors.initials: L
authors.lastname: Tao
authors.forename: S C
authors.initials: SC
authors.lastname: Kalhan
authors.forename: R N
authors.initials: RN
authors.lastname: Kalaria
authors.forename: H L
authors.initials: HL
authors.lastname: Kaung
authors.forename: M S
authors.initials: MS
authors.lastname: Patel
mesh_terms: D000818:Animals; D000833:Animals, Suckling / Q000502:physiology*; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight; D004040:Dietary Carbohydrates / Q000494:pharmacology*; D005526:Food, Formulated; D005934:Glucagon / Q000097:blood; D005951:Glucose Tolerance Test; D007328:Insulin / Q000097:blood / Q000378:metabolism; D008297:Male; D010179:Pancreas / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates; D007328:Insulin; D005934:Glucagon