Characterization of selenium speciation in selenium-enriched button mushrooms (Agaricus bisporus) and selenized yeasts (dietary supplement) using X-ray absorption near-edge structure (XANES) spectroscopy

Alexander Prange; Miriam Sari; Susanne von Ameln; Csaba Hajdu; Reinhard Hambitzer; Sabine Ellinger; Josef Hormes

doi:10.1016/j.jtemb.2018.10.018

Characterization of selenium speciation in selenium-enriched button mushrooms (Agaricus bisporus) and selenized yeasts (dietary supplement) using X-ray absorption near-edge structure (XANES) spectroscopy

J Trace Elem Med Biol. 2019 Jan:51:164-168. doi: 10.1016/j.jtemb.2018.10.018. Epub 2018 Oct 22.

Authors

Alexander Prange¹, Miriam Sari², Susanne von Ameln³, Csaba Hajdu⁴, Reinhard Hambitzer², Sabine Ellinger², Josef Hormes⁵

Affiliations

¹ Competence Center for Applied Mycology and Environmental Studies, Department of Food Sciences and Nutrition, Niederrhein University of Applied Sciences, Rheydter Str. 277, D-41065 Mönchengladbach, Germany; The J. Bennett Johnston, Sr., Center for Advanced Microstructures & Devices (CAMD), Louisiana State University, 6980 Jefferson Highway, Baton Rouge, LA 70803, USA; Institute for Virology and Microbiology, University of Witten/Herdecke, Stockumer Str. 10, D-58453 Witten, Germany. Electronic address: A.Prange@gmx.de.
² Competence Center for Applied Mycology and Environmental Studies, Department of Food Sciences and Nutrition, Niederrhein University of Applied Sciences, Rheydter Str. 277, D-41065 Mönchengladbach, Germany.
³ Competence Center for Applied Mycology and Environmental Studies, Department of Food Sciences and Nutrition, Niederrhein University of Applied Sciences, Rheydter Str. 277, D-41065 Mönchengladbach, Germany; Institute for Virology and Microbiology, University of Witten/Herdecke, Stockumer Str. 10, D-58453 Witten, Germany.
⁴ BioFungi kft, 2338 Áporka, Szabadság telep 030/10, Hungary.
⁵ The J. Bennett Johnston, Sr., Center for Advanced Microstructures & Devices (CAMD), Louisiana State University, 6980 Jefferson Highway, Baton Rouge, LA 70803, USA; Institute of Physics, University of Bonn, Nussallee 12, D-53115 Bonn, Germany.

PMID: 30466927
DOI: 10.1016/j.jtemb.2018.10.018

Abstract

Selenium is an essential trace element for which dietary intake is not sufficient in many parts of the world such as in Europe. Yeast and mushrooms may accumulate considerable amounts of selenium, but the chemical form in mushrooms has not been elucidated yet. Thus, we determined the selenium speciation of selenium-enriched button mushrooms in comparison to that of selenized yeast via Se K-edge XANES spectroscopy. Quantitative analysis of the XANES spectra revealed that the selenium in selenized yeast is mainly present as seleno-methionine but that in selenium-enriched button mushrooms, it is present predominantly as Se-methyl-l-selenocysteine. As this form is highly bioavailable and directly enters the selenium metabolic pool, selenium-enriched mushrooms may be a good food choice to improve selenium intake.

Keywords: Button mushrooms; Quantitative analysis; Selenium; Selenium K-edge; Selenized yeast; XANES spectroscopy.

MeSH terms

Agaricus / chemistry*
Dietary Supplements / analysis*
Saccharomyces cerevisiae / chemistry*
Selenium / analysis*
X-Ray Absorption Spectroscopy

Substances

Selenium