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Simulated sunlight sectively modifies maillard reaction products in a wide array of chemical reactions.
Chem. Eur. J. 25, 13208-13217 (2019)
The photochemical transformation of Maillard reaction products (MRPs) under simulated sunlight into mostly unexplored photoproducts is reported herein. Non-enzymatic glycation of amino acids leads to a heterogeneous class of intermediates with extreme chemical diversity, which is of particular relevance in processed and stored food products as well as in diabetic and age-related protein damage. Here, three amino acids (lysine, arginine, and histidine) were reacted with ribose at 100 °C in water for ten hours. Exposing these model systems to simulated sunlight led to a fast decay of MRPs. The photodegradation of MRPs and the formation of new compounds have been studied by fluorescence spectroscopy and nontargeted (ultra)high-resolution mass spectrometry. Photoreactions showed strong selectivity towards the degradation of electron-rich aromatic heterocycles, such as pyrroles and pyrimidines. The data show that oxidative cleavage mechanisms dominate the formation of photoproducts. The photochemical transformations differed fundamentally from "traditional" thermal Maillard reactions and indicated a high amino acid specificity.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Advanced Glycation ; Maillard Reaction ; Photochemistry ; Photooxidation ; Reactive Oxygen Species
ISSN (print) / ISBN
0947-6539
e-ISSN
1521-3765
Journal
Chemistry - A European Journal
Quellenangaben
Volume: 25,
Issue: 57,
Pages: 13208-13217
Publisher
Wiley
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Analytical BioGeoChemistry (BGC)