The project will evaluate 1) the postprandial metabolism and 2) continuous glucose levels in subjects diagnosed with Idiopathic Ketotic Hypoglycemia (IKH)) and healthy control subjects.
IKH is a common, but not fully understood, condition in children, and in some the condition may persist in adulthood. In the present study we seek to evaluate the postprandial metabolism in adult subjects diagnosed with IKH through a clinical study including: 1. two test days, where the subjects completes a) an oral glucose tolerance test (OGTT) and b) a miced meal test (MMT). Before, during and after ingestion of the OGTT/MMT, blood samples will be frequently drawn for the evaluation of plasma glucose, hormones, amino acids and more. During both tests, the subjects will recieve a continuous infusion of primed glucose tracer to further evaluate the glucose metabolism. 2. a 14-day period where the subjects will lead the usual lives, wearing a continuous glucose monitor (CGM). This will enable us to evaluate long-term differences in plasma glucose levels in IKH.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
20
Consumption of 75 grams of glucose, diluted in water, added 1,5 g of acetaminophen.
Consumption of a standardized liquid meal, with caloric and dietary content equal to a standard meal.
Center for Clinical Metabolic Research, Department of Medicine, Gentofte Hospital
Hellerup, Copenhagen, Denmark
Plasma glucose
The intergroup difference in peak to nadir difference in plasma glucose following OGTT/MMT
Time frame: -120, -60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Time in range (CGM)
The intergroup difference in time spend in glycemic range, measured by CGM
Time frame: 0-14 days of CGM-period
Endogenous glucose production
Rate of appearance of glucose, measured by tracer dilution technique
Time frame: -120,, -60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Glucose revomal
Rate of disappearance of glucose, measured by tracer dilution technique
Time frame: -120, -60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Amino acids
Plasma concentrations of amino acids
Time frame: -120,-60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Insulin
Plasma concentrations of insulin
Time frame: -120,-60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Glucagon
Plasma concentrations of glucagon
Time frame: -120,-60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Glucagon like peptide-1 (GLP-1)
Plasma concentrations of GLP-1
Time frame: -120,-60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
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Glucose-dependent insulinotropic polypeptide (GIP)
Plasma concentrations of GIP
Time frame: -120,-60, -30, 0, 15, 30, 45, 60, 90, 120, 150, 180 minutes
Coefficients of variation (CV) of plasma glucose
CV of plasma glucose measured by CGM
Time frame: 0-14 days of CGM-period
Mean plasma glucose
Average value of plasma glucose measured by CGM
Time frame: 0-14 days of CGM-period
Risk of hypoglycemia
Time spend in hypoglycemia measured by CGM
Time frame: 0-14 days of CGM-period