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Updated: Feb 16, 2026

Characterization of Metabolic Status in Nonhuman Primates with the Intravenous Glucose Tolerance Test
Published on: November 13, 2016
One-hour post-load plasma glucose level is associated with a worse metabolic profile in children with GH deficiency
1Section of Endocrinology, Biomedical Department of Internal and Specialist Medicine (DIBIMIS), University of Palermo, Piazza delle Cliniche 2, 90127, Palermo, Italy.
Insights
Children with higher 1-hour plasma glucose (1hPG) during an oral glucose tolerance test (OGTT) show altered glucose metabolism and lipid profiles. This 1hPG level may help identify children needing closer monitoring during growth hormone treatment (GHT).
Area of Science:
- Pediatric Endocrinology
- Metabolic Disorders
- Growth Hormone Therapy
Background:
- Elevated 1-hour plasma glucose (1hPG) after oral glucose tolerance test (OGTT) in children predicts future glucose metabolism issues.
- Growth hormone deficiency (GHD) can impact metabolic health.
Purpose of the Study:
- To metabolically characterize children with GHD based on their 1hPG levels.
- To assess the impact of growth hormone treatment (GHT) on metabolic parameters in GHD children with varying 1hPG levels.
Main Methods:
- Fifty-one GHD children were grouped by baseline 1hPG and compared to 50 controls.
- Evaluated auxological parameters, IGF-1, glucose/insulin during OGTT, lipid profiles, oral disposition index (DIo), Homa-IR, and insulin sensitivity index (ISI) at baseline and after 12 months of GHT.
Main Results:
- GHD children had higher baseline 1hPG, LDL, and lower HDL compared to controls.
- Children with higher 1hPG showed decreased DIo and poorer insulin sensitivity (ISI Matsuda) after GHT.
- Baseline 1hPG correlated positively with Homa-IR and LDL, and negatively with ISI Matsuda and DIo.
Conclusions:
- Baseline 1hPG is a valuable tool for identifying GHD children at higher metabolic risk.
- Children with elevated 1hPG may require enhanced metabolic surveillance during GHT.
Purpose:
In children, the plasma glucose value at 1 h (1hPG) during OGTT higher than 132.5 mg/dl is a predictor of alterations in glucose metabolism. We aimed to metabolically characterize GHD children according to 1hPG levels.
Methods:
Fifty-one GHD children (35 M, 16 F; mean age 8.6 years), grouped according to 1hPG, were evaluated at diagnosis and after 12 months of GH treatment (GHT) and compared with 50 matched controls at baseline. Auxological parameters, insulin-like growth factor-1 (IGF-1), glucose and insulin during OGTT, lipid profile, the oral disposition index (DIo), the homeostasis model assessment estimate of insulin resistance (Homa-IR), and the insulin sensitivity index (ISI) were evaluated.
Results:
At baseline, 31.4% of GHD children and 12% of controls (p = 0.016) showed 1hPG ≥ 132.5 mg/dl. The first ones showed higher mean 1hPG (p = 0.025) and LDL cholesterol (p = 0.029) and lower HDL cholesterol (p = 0.014) than controls. GHD with higher 1hPG showed a significant decrease in DIo (p < 0.001) without improvement in lipid profile after GHT, compared with children with lower 1hPG. After 12 months, the higher 1hPG group showed lower ISI Matsuda (p = 0.047) and DIo (p < 0.001) than the lower 1hPG group. 1hPG levels proved to be positively correlated with Homa-IR (p = 0.010) and LDL cholesterol (p = 0.032) and negatively with ISI Matsuda (p = 0.001) and DIo (p = 0.019). The 1hPG value at baseline was the only independent variable significantly associated with DIo at 12 months (p = 0.041).
Conclusions:
1hPG level at baseline may be a useful tool to identify and properly follow up children with enhanced metabolic risk who probably need more surveillance during GHT.
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