Cited by 113Advanced Glycation End Products researchPotato Plant ResearchPhytochemicals and Antioxidant Activities

Glycation in food and metabolic transit of dietary AGEs (advanced glycation end-products): studies on the urinary excretion of pyrraline

Foerster, A., Henle, T.·2003·Biochemical Society Transactions

Abstract

Pyrraline [epsilon-(2'-formyl-5'-hydroxymethyl-pyrrolyl)-L-norleucin] belongs to the group of AGEs (advanced glycation end-products) formed in the final stage of the Maillard reaction in foods and in vivo. As it is generally accepted that AGEs are pathophysiologically relevant in aging and in diseases such as diabetes and uraemia, physiological consequences resulting from the ingestion of dietary AGEs are discussed, but balance studies for well defined AGEs are still lacking. The aim of our study was to investigate the influence of nutrition on the urinary excretion of pyrraline. After the first day without dietary restrictions, seven healthy volunteers were asked, starting on the morning of day 2, to ingest a diet virtually free of Maillard compounds (i.e. no cooked or roasted foods, no bakery products, no coffee, etc.). Dietary control was stopped on the morning of day 5. We collected 24 h urine samples for these 5 days, which were analysed for free pyrraline by reverse-phase HPLC with UV detection at 297 nm. We found that urinary excretion of free pyrraline was directly affected by the composition of the diet, decreasing from 4.8+/-1.1 mg/day on day 1 to levels of 1.6, 0.4 and 0.3 mg/day on days 2, 3 and 4 respectively, followed by a significant increase to 3.2+/-1.4 mg/day on the 5th day. The results of this work prove, for the first time, that urinary excretion of pyrraline is strongly dependent on its dietary intake. Thus the influence of nutrition should be taken into consideration in studies directed to the physiological role of glycation compounds.

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Crossref · 10.1042/bst0311383

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  • Intake of soya either high or low in isoflavones for one, two or four months had no effect on CRP, SAA or TNF-α concentrations in hypercholesterolaemic men or postmenopausal women.

    “The intake of soya either high or low in isoflavones for 1, 2 or 4 months had also no effect on CRP, SAA or TNF-a concentrations in hypercholesterolaemic men or in postmenopausal women (356,359,362) .”

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Authors
Foerster, A., & Henle, T.
Affiliations
Technische Universität Dresden (DE)
Venue
Biochemical Society Transactions
Published
2003-12-01
Volume
31
Issue
6
Pages
1383-1385
ISSN
  • 0300-5127 (ISSN-L)
  • 1470-8752
OpenAlex
W2011443409
Cited by
113
References
1
Citations by year
2025: 1 · 2024: 2 · 2023: 4 · 2022: 6 · 2021: 8 · 2020: 9 · 2019: 3 · 2018: 10 · 2017: 5 · 2016: 7 · 2015: 7 · 2014: 4 · 2013: 7 · 2012: 6
FWCI
1.98
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical Society Transactions (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Advanced Glycation End Products research
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Potato Plant Research
  • Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
Keywords
pyrraline, advanced glycation end products, Maillard reaction, dietary AGEs, urinary excretion, diet composition, glycation
MeSH terms
Adult, Chromatography, High Pressure Liquid, Diet, Female, Humans, Male, Middle Aged, Norleucine, Pyrroles, Spectrophotometry, Ultraviolet, Glycation End Products, Advanced

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