Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/36841

TítuloZearalenone and its derivatives α-Zearalenol and β-Zearalenol decontamination by Saccharomyces cerevisiae strains isolated from bovine forage
Autor(es)Keller, Luiz
Abrunhosa, Luís
Keller, Kelly
Rosa, Carlos Alberto
Cavaglieri, Lilia
Venâncio, Armando
Saccharomyces cerevisiae
EditoraMDPI Publishing
CitaçãoKeller, Luiz; Abrunhosa, Luís; Keller, Kelly; Rosa, Carlos Alberto; Cavaglieri, Lilia; Venâncio, Armando, Zearalenone and its derivatives α-Zearalenol and β-zearalenol decontamination by Saccharomyces cerevisiae strains isolated from bovine forage. Toxins, 7(8), 3297-3308, 2015
Resumo(s)Zearalenone (ZEA) and its derivatives are mycotoxins with estrogenic effects on mammals. The biotransformation for ZEA in animals involves the formation of two major metabolites, - and -zearalenol (-ZOL and -ZOL), which are subsequently conjugated with glucuronic acid. The capability of Saccharomyces cerevisiae strains isolated from silage to eliminate ZEA and its derivatives -ZOL and -ZOL was investigated as, also, the mechanisms involved. Strains were grown on Yeast Extract-Peptone-Dextrose medium supplemented with the mycotoxins and their elimination from medium was quantified over time by HPLC-FL. A significant effect on the concentration of ZEA was observed, as all the tested strains were able to eliminate more than 90% of the mycotoxin from the culture medium in two days. The observed elimination was mainly due to ZEA biotransformation into -ZOL (53%) and -ZOL (8%) rather than to its adsorption to yeast cells walls. Further, the biotransformation of -ZOL was not observed but a small amount of -ZOL (6%) disappeared from culture medium. ZEA biotransformation by yeasts may not be regarded as a full detoxification process because both main end-products are still estrogenic. Nonetheless, it was observed that the biotransformation favors the formation of -ZOL which is less estrogenic than ZEA and -ZOL. This metabolic effect is only possible if active strains are used as feed additives and may play a role in the detoxification performance of products with viable S. cerevisiae cells.
Versão da editorahttp://www.mdpi.com/2072-6651/7/8/3297
Arbitragem científicayes
Aparece nas coleções:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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