Formation of Zearalenone Metabolites in Tempeh Fermentation.

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ID: 3803
2019
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Abstract
Tempeh is a common food in Indonesia, produced by fungal fermentation of soybeans using , as well as , for inoculation. Analogously, for economic reasons, mixtures of maize and soybeans are used for the production of so-called tempeh-like products. For maize, a contamination with the mycoestrogen zearalenone (ZEN) has been frequently reported. ZEN is a mycotoxin which is known to be metabolized by and species. Consequently, this study focused on the ZEN transformation during tempeh fermentation. Five fungal strains of the genera and , isolated from fresh Indonesian tempeh and authentic Indonesian inocula, were utilized for tempeh manufacturing from a maize/soybean mixture (30:70) at laboratory-scale. Furthermore, comparable tempeh-like products obtained from Indonesian markets were analyzed. Results from the HPLC-MS/MS analyses show that ZEN is intensely transformed into its metabolites α-zearalenol (α-ZEL), ZEN-14-sulfate, α-ZEL-sulfate, ZEN-14-glucoside, and ZEN-16-glucoside in tempeh production. α-ZEL, being significantly more toxic than ZEN, was the main metabolite in most of the incubations, while in fermentations ZEN-14-sulfate was predominantly formed. Additionally, two of the 14 authentic samples were contaminated with ZEN, α-ZEL and ZEN-14-sulfate, and in two further samples, ZEN and α-ZEL, were determined. Consequently, tempeh fermentation of ZEN-contaminated maize/soybean mixture may lead to toxification of the food item by formation of the reductive ZEN metabolite, α-ZEL, under model as well as authentic conditions.
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borzekowski2019formationmolecules Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Borzekowski, Antje;Anggriawan, Riyan;Auliyati, Maryeni;Kunte, Hans-Jörg;Koch, Matthias;Rohn, Sascha;Karlovsky, Petr;Maul, Ronald;
Journal molecules
Year 2019
DOI
E2697
URL
Keywords Keywords not found

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