β-cell function, incretin response, and insulin sensitivity of glucose and fat metabolism in obese youth: Relationship to OGTT-time-to-glucose-peak
| Autor: | Shahwar Yousuf, Sara F. Michaliszyn, Joon Young Kim, Fida Bacha, SoJung Lee, Hala Tfayli, Silva A. Arslanian, Nour Gebara |
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| Rok vydání: | 2019 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Adolescent Endocrinology Diabetes and Metabolism medicine.medical_treatment Incretin Adipose tissue 030209 endocrinology & metabolism Type 2 diabetes Fatty Acids Nonesterified Incretins Body Mass Index Impaired glucose tolerance 03 medical and health sciences 0302 clinical medicine Risk Factors Internal medicine Insulin-Secreting Cells Insulin Secretion Internal Medicine medicine Humans 030212 general & internal medicine Obesity Child chemistry.chemical_classification business.industry Insulin Fatty acid Metabolism Glucose Tolerance Test medicine.disease Endocrinology chemistry Diabetes Mellitus Type 2 Pediatrics Perinatology and Child Health Female Insulin Resistance business Biomarkers |
| Zdroj: | Pediatric diabetesREFERENCES. 21(1) |
| ISSN: | 1399-5448 |
| Popis: | Background In adults, the time-to-glucose-peak at or after 30 minutes during an oral glucose tolerance test (OGTT) identifies physiologically distinct groups with differences in insulin sensitivity, β-cell function and risk for type 2 diabetes. In obese non-diabetic adolescents, we investigated if the OGTT-time-to-glucose-peak also reflects incretin and free fatty acid (FFA) responses besides insulin sensitivity and β-cell function, measured by the clamp. Methods Obese adolescents (n = 278) were categorized according to their OGTT-time-to-glucose-peak by Early-peak (at 30 minutes) vs Late-peak (>30 minutes) groups. Body composition, visceral adipose tissue, oral disposition index and OGTT-area under the curve (AUC) were examined. A subset of 102 participants had both hyperinsulinemic-euglycemic and hyperglycemic clamps to measure in vivo insulin sensitivity, insulin secretion, and β-cell function relative to insulin sensitivity. Results Compared with the Early-peak group, the Late-peak group had impaired β-cell function relative to insulin sensitivity, lower glucose-dependent insulinotropic polypeptide-AUC, and higher FFA-AUC despite higher insulin- and C-peptide-AUC. They also had lower hepatic and peripheral insulin sensitivity despite similar percent body fat and visceral adipose tissue, and had higher prevalence of impaired glucose tolerance (all P Conclusions In obese non-diabetic youth, those with a Late-peak vs an Early-peak glucose during an OGTT showed diminished β-cell function, blunted incretin secretion, and lower insulin sensitivity of glucose and FFA metabolism. It remains to be determined if Late-peak glucose predicts the future development of type 2 diabetes in these high-risk youth. |
| Databáze: | OpenAIRE |
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