4.5 Article

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

期刊

BIOLOGICAL TRACE ELEMENT RESEARCH
卷 196, 期 2, 页码 512-516

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SPRINGERNATURE
DOI: 10.1007/s12011-019-01935-9

关键词

Bioavailability; Biotransformation; Pharmacokinetics; Selenium-enriched yeast; Sodium selenite

资金

  1. Hubei Provincial Natural Science Foundation of China [2018CFB612]

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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 mu g 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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