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Comparison of Bioavailability, Pharmacokinetics, and Biotransformation of Selenium-Enriched Yeast and Sodium Selenite in Rats Using Plasma Selenium and Selenomethionine

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Abstract

For the first time, bioavailability, pharmacokinetics, and biotransformation of selenium-enriched yeast (SeY) and sodium selenite (Na2SeO3) in rats were systemically compared by analyzing free selenomethionine (SeMet), total SeMet, and selenium (Se). After SeY and Na2SeO3 were orally administered to rats at a dose of 100 μg Se/kg, plasma free SeMet, total SeMet, and Se at various time points were determined by ultra-performance liquid chromatography-tandem mass spectrometry. Based on Se and total SeMet, the relative bioavailability values of SeY compared with Na2SeO3 were 144% and 272%, respectively. For the rats treated with SeY, 0.73–2.68% of total Se was biotransformed to free SeMet, 14.3–20.4% to SeMet-proteins and albumin-bound SeMet, and 75.9–82.3% to selenoproteins in plasma. SeY had higher bioavailability than Na2SeO3 based on Se and total SeMet levels. Plasma SeMet was the optimal biomarker of SeY status in vivo.

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Funding

The work was partly supported by the Hubei Provincial Natural Science Foundation of China (2018CFB612).

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Authors and Affiliations

  1. National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, 27 Nanwei Road, Beijing, 100050, China

    Shuang-Qing Zhang & Shi Shen

  2. The Hubei Provincial Key Laboratory of Yeast Function, 168 Huaxi Road, Yichang, 443003, China

    Yan Zhang

Authors
  1. Shuang-Qing Zhang
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  2. Shi Shen
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Correspondence to Shuang-Qing Zhang.

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Animal experiments were adhered to the Guide for the Care and Use of Laboratory Animals (NIH publication no. 85-23, eighth edition in 2011) and were approved by our Institutional Animal Care and Use Committee.

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Zhang, SQ., Shen, S. & Zhang, Y. Comparison of Bioavailability, Pharmacokinetics, and Biotransformation of Selenium-Enriched Yeast and Sodium Selenite in Rats Using Plasma Selenium and Selenomethionine. Biol Trace Elem Res 196, 512–516 (2020). https://doi.org/10.1007/s12011-019-01935-9

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  • DOI: https://doi.org/10.1007/s12011-019-01935-9

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