title: Decreased basal insulin secretion from pancreatic islets of pups in a rat model of maternal obesity.
abstract: Maternal obesity (MO) is a deleterious condition that enhances susceptibility of adult offspring to metabolic diseases such as type 2 diabetes. The objective is to study the effect of MO on in vitro insulin secretion and pancreatic cellular population in offspring. We hypothesize that a harmful antenatal metabolic environment due to MO diminishes the basal glucose-responsive secretory function of pancreatic beta cells in offspring. Mothers were fed a control (C) or high-fat diet from weaning through pregnancy (120 days) and lactation. At postnatal days (PNDs) 36 and 110, pups were killed, peripheral blood was collected and pancreatic islets were isolated. Basal insulin secretion was measured in vitro in islets for 60 min. It was found that blood insulin, glucose and homeostasis model assessment (HOMA) index were unaffected by maternal diet and age in females. However, male MO offspring at PND 110 showed hyperinsulinemia and insulin resistance compared with C. Body weight was not modified by MO, but fat content was higher in MO pups compared with C pups. Triglycerides and leptin concentrations were higher in MO than in C offspring in all groups except in females at PND 36. Pancreatic islet cytoarchitecture was unaffected by MO. At PND 36, islets of male and female C and MO offspring responded similarly to glucose, but at PND 110, male and female MO offspring islets showed a 50% decrease in insulin secretion. It was concluded that MO impairs basal insulin secretion of offspring with a greater impact on males than females, and this effect mainly manifests in adulthood.
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México.
authors: Elena
authors: E
authors: Zambrano
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México.
authors: Tonantzin
authors: T
authors: Sosa-Larios
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México.
authors: Lizbeth
authors: L
authors: Calzada
authors: Departamento de BiologíaFacultad de Química, Universidad Nacional Autónoma de México, Mexico City, México.
authors: Carlos A
authors: CA
authors: Ibáñez
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México.
authors: Carmen A
authors: CA
authors: Mendoza-Rodríguez
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México.
authors: Angélica
authors: A
authors: Morales
authors: Departamento de Biología de la ReproducciónInstituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, México sumiko.morimotom@incmnsz.mx.
authors: Sumiko
authors: S
authors: Morimoto
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000209:etiology; D059305:Diet, High-Fat; D005260:Female; D007328:Insulin / Q000097:blood / Q000378:metabolism*; D000078790:Insulin Secretion; D050417:Insulin-Secreting Cells / Q000378:metabolism*; D020738:Leptin / Q000097:blood; D008297:Male; D039382:Maternal Nutritional Physiological Phenomena; D009765:Obesity / Q000097:blood / Q000150:complications*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects / Q000097:blood*; D051381:Rats; D014280:Triglycerides / Q000097:blood
chemical_list: D001786:Blood Glucose; D007328:Insulin; D020738:Leptin; D014280:Triglycerides
keywords: beta and alpha cells; cytoarchitecture; insulin secretion; maternal obesity; offspring