This project focuses on the identification of early metabolic disturbances implicated in the genesis of juvenile obesity. The investigator propose to determine whether hyperinsulinemia or insulin resistance is the primary defect that is present in """"""""high-risk"""""""" preadolescent children of obese parents compared to low risk lean preadolescent children of nonobese parents prior to the development of obesity. The applicant will use a modification of the hyperglycemic clamp to quantify insulin secretion in the two groups and to independently assess the influence of gut factors on the betas cell response to hyperglycemia; and she will attempt to ascertain the relationship between leptin levels and the hyperinsulinemia of juvenile obesity; as well as assess whether defective catecholamine induced stimulation of lipolysis might contribute to further weight gain in obese children. To address these issues the investigator will utilize isotopic infusions and microdialysis techniques. The observed metabolic defects will be related to alterations in fat distribution assessed by MRI. The long-term goal is to generate data that will lead to the development of new strategies for the prevention and treatment of juvenile obesity.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Project (R01)
Project #
2R01HD028016-06A1
Application #
2025301
Study Section
Nutrition Study Section (NTN)
Project Start
1991-06-01
Project End
2001-05-31
Budget Start
1997-06-01
Budget End
1998-05-31
Support Year
6
Fiscal Year
1997
Total Cost
Indirect Cost
Name
Yale University
Department
Pediatrics
Type
Schools of Medicine
DUNS #
082359691
City
New Haven
State
CT
Country
United States
Zip Code
06520
Galderisi, Alfonso; Giannini, Cosimo; Weiss, Ram et al. (2018) Trajectories of changes in glucose tolerance in a multiethnic cohort of obese youths: an observational prospective analysis. Lancet Child Adolesc Health 2:726-735
Tricò, Domenico; Natali, Andrea; Mari, Andrea et al. (2018) Triglyceride-rich very low-density lipoproteins (VLDL) are independently associated with insulin secretion in a multiethnic cohort of adolescents. Diabetes Obes Metab 20:2905-2910
Tricò, Domenico; Caprio, Sonia; Rosaria Umano, Giuseppina et al. (2018) Metabolic Features of Nonalcoholic Fatty Liver (NAFL) in Obese Adolescents: Findings From a Multiethnic Cohort. Hepatology 68:1376-1390
Caprio, Sonia; Perry, Rachel; Kursawe, Romy (2017) Adolescent Obesity and Insulin Resistance: Roles of Ectopic Fat Accumulation and Adipose Inflammation. Gastroenterology 152:1638-1646
Tricò, Domenico; Di Sessa, Anna; Caprio, Sonia et al. (2017) Oxidized Derivatives of Linoleic Acid in Pediatric Metabolic Syndrome: Is Their Pathogenic Role Modulated by the Genetic Background and the Gut Microbiota? Antioxid Redox Signal :
Goffredo, Martina; Santoro, Nicola; Tricò, Domenico et al. (2017) A Branched-Chain Amino Acid-Related Metabolic Signature Characterizes Obese Adolescents with Non-Alcoholic Fatty Liver Disease. Nutrients 9:
Weiss, Ram; Santoro, Nicola; Giannini, Cosimo et al. (2017) Prediabetes in youth - mechanisms and biomarkers. Lancet Child Adolesc Health 1:240-248
Tricò, Domenico; Prinsen, Hetty; Giannini, Cosimo et al. (2017) Elevated ?-Hydroxybutyrate and Branched-Chain Amino Acid Levels Predict Deterioration of Glycemic Control in Adolescents. J Clin Endocrinol Metab 102:2473-2481
Hoang, Don; Broer, Niclas; Sosa, Julie A et al. (2017) Leptin Is Produced by Parathyroid Glands and Stimulates Parathyroid Hormone Secretion. Ann Surg 266:1075-1083
Cropano, Catrina; Santoro, Nicola; Groop, Leif et al. (2017) The rs7903146 Variant in the TCF7L2 Gene Increases the Risk of Prediabetes/Type 2 Diabetes in Obese Adolescents by Impairing ?-Cell Function and Hepatic Insulin Sensitivity. Diabetes Care 40:1082-1089

Showing the most recent 10 out of 92 publications