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Updated: Aug 1, 2025

Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo
Published on: April 6, 2022
In Vivo Metabolism of 1,5-Anhydro-d-fructose to 1,5-Anhydro-d-glucitol
Moe Ijiri1, Kazuhiro Yoshinaga2, Hiroaki Kawaguchi3
1Joint Faculty of Veterinary Medicine Kagoshima University, Kagoshima, Japan.
Background/Aim:
1,5-Anhydro-d-fructose (1,5-AF, saccharide) and 1,5-anhydro-d-glucitol (1,5-AG) converted from 1,5-AF via the glycemic pathway have health benefits. However, this metabolism has not been sufficiently elucidated. To clarify the in vivo metabolism of 1,5-AF to 1,5-AG, porcine (blood kinetics) and human (urinary excretion) studies were conducted.
Materials And Methods:
Microminipigs were administrated 1,5-AF orally or intravenously. Blood samples were obtained to analyse the kinetics of 1,5-AF and 1,5-AG. Urine samples were collected from human subjects who had orally ingested 1,5-AF, and the amounts of 1,5-AF and 1,5-AG excreted in the urine were analysed.
Results:
In blood kinetics analysis, the time to the maximum concentration of 1,5-AF after intravenous administration was 0.5 h, whereas 1,5-AF was not observed after oral administration. The times to the maximum concentration of 1,5-AG after intravenous and oral administration were 1.5 h and 2 h, respectively. In urinary excretion, the concentration of 1,5-AG in urine rapidly increased after the administration of 1,5-AF, peaked at 2 h, whereas 1,5-AF was not detected.
Conclusion:
1,5-AF was rapidly metabolized to 1.5-AG in vivo in swine and human.
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