Cited by 17Advanced Glycation End Products researchRadiopharmaceutical Chemistry and ApplicationsPotato Plant Research

Biodistribution and catabolism of 18F-labeled N-ε-fructoselysine as a model of Amadori products

Hultsch, Christina, Hellwig, Michael, Pawelke, Beate, Bergmann, Ralf, Rode, Katrin, Pietzsch, Jens, Krause, René, Henle, Thomas·2006·Nuclear Medicine and Biology

Abstract

Amadori products are formed in the early stage of the so-called Maillard reaction between reducing sugars and amino acids or proteins. Such nonenzymatic glycosylation may occur during the heating or storage of foods, but also under physiological conditions. N-epsilon-fructoselysine is formed via this reaction between the epsilon-amino group of peptide-bound lysine and glucose. Despite the fact that, in certain heated foods, up to 50% of lysyl moieties may be modified to such lysine derivatives, up to now, very little is known about the metabolic fate of alimentary administered Amadori compounds. In the present study, N-succinimidyl-4-[18F]fluorobenzoate was used to modify N-epsilon-fructoselysine at the alpha-amino group of the lysyl moiety. The in vitro stability of the resulting 4-[18F]fluorobenzoylated derivative was tested in different tissue homogenates. Furthermore, the 4-[18F]fluorobenzoylated N-epsilon-fructoselysine was used in positron emission tomography studies, as well as in studies concerning biodistribution and catabolism. The results show that the 4-[18F]fluorobenzoylated N-epsilon-fructoselysine is phosphorylated in vitro, as well as in vivo. This phosphorylation is caused by fructosamine 3-kinases and occurs in vivo, particularly in the kidneys. Despite the action of these enzymes, it was shown that a large part of the intravenously applied radiolabeled N-epsilon-fructoselysine was excreted nearly unchanged in the urine. Therefore, it was concluded that the predominant part of peptide-bound lysine that was fructosylated during food processing is not available for nutrition.

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Crossref · 10.1016/j.nucmedbio.2006.07.007

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Authors
Hultsch, C., Hellwig, M., Pawelke, B., Bergmann, R., Rode, K., Pietzsch, J., Krause, R., & Henle, T.
Affiliations
  • Helmholtz-Zentrum Dresden-Rossendorf (DE)
  • Technische Universität Dresden (DE)
Corresponding author
Hultsch, Christina
Venue
Nuclear Medicine and Biology
Publisher
Elsevier BV
Published
2006-10
Volume
33
Issue
7
Pages
865-873
ISSN
0969-8051 (ISSN-L)
OpenAlex
W2074142044
Cited by
17
References
27
Citations by year
2024: 2 · 2023: 1 · 2022: 1 · 2019: 1 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 2
FWCI
0.68
Type
journal article
Language
en
Open access
closed
Locations
  • Nuclear Medicine and Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Advanced Glycation End Products research
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiopharmaceutical Chemistry and Applications
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Potato Plant Research
Keywords
Amadori products, Maillard reaction, glycation, tissue distribution, catabolism, phosphorylation, fructosamine-3-kinase, kidney, urinary excretion, food processing, positron emission tomography
MeSH terms
Animals, Fluorine Radioisotopes, Lysine, Male, Metabolic Clearance Rate, Metabolism, Organ Specificity, Tissue Distribution, Maillard Reaction, Rats, Wistar, Radiopharmaceuticals, Positron-Emission Tomography, Rats

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