期刊
PEDIATRIC DIABETES
卷 19, 期 7, 页码 1173-1182出版社
WILEY
DOI: 10.1111/pedi.12700
关键词
cystic fibrosis-related diabetes; early glucose intolerance; insulin secretion; proinsulin secretory ratio; beta-cell secretory capacity
资金
- Cystic Fibrosis Foundation
- National Institute of Diabetes and Digestive and Kidney Diseases
- Human Metabolism Resource of the University of Pennsylvania Institute for Diabetes, Obesity Metabolism
- University of Pennsylvania Training Grant in Diabetes, Endocrine and Metabolic Diseases [T32 DK007314]
- University of Pennsylvania Diabetes Research Center [P30 DK19525]
- Penn and CHOP Clinical & Translational Research Centers [UL1 TR000003]
- Public Health Services Research Grants [K23 DK107937, R01 DK97830]
Background: Patients with pancreatic insufficient cystic fibrosis (PI-CF) meeting standard criteria for normal glucose tolerance display impaired beta-cell secretory capacity and early-phase insulin secretion defects. We sought evidence of impaired beta-cell secretory capacity, a measure of functional beta-cell mass, among those with early glucose intolerance (EGI), defined as 1-hour oral glucose tolerance test (OGTT) glucose 155 mg/dL (8.6 mmol/L). Methods: A cross-sectional study was conducted in the Penn and CHOP Clinical & Translational Research Centers. PI-CF categorized by OGTT as normal (PI-NGT: 1-hour glucose <155 mg/dL and 2-hour <140 mg/dL [7.8 mmol/L]; n=13), PI-EGI (1-hour >= 155 mg/dL and 2-hour <140 mg/dL; n = 13), impaired (PI-IGT: 2-hour >= 140 and <200 mg/dL [11.1 mmol/L]; n = 8), and diabetic (cystic fibrosis-related diabetes, CFRD: 2-hour >= 200mg/dL; n = 8) participated. Post-prandial glucose tolerance and insulin secretion, and beta-cell secretory capacity and demand were derived from mixed-meal tolerance tests (MMTTs), and glucose-potentiated arginine (GPA) tests, respectively. Results: PI-EGI had elevated post-prandial glucose with reduced early-phase insulin secretion during MMTT compared to PI-NGT (P < .05). PI-EGI also exhibited impaired acute insulin and C-peptide responses to GPA (P < .01 vs PI-NGT), measures of beta-cell secretory capacity. Proinsulin secretory ratios were higher under hyperglycemic clamp conditions in PI-IGT and CFRD (P < .05 vs PI-NGT), and correlated with 1-hour glucose in PI-CF (P < .01). Conclusions: PI-CF patients with 1-hour OGTT glucose >= 155mg/dL already manifest impaired beta-cell secretory capacity with associated early-phase insulin secretion defects. Avoiding hyperglycemia in patients with EGI may be important for preventing excessive insulin demand indicated by disproportionately increased proinsulin secretion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据