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Enrichment and Distribution of Selenium in Pediococcus acidilactici MRS-7: Impact on Its Biochemical Composition, Microstructure, and Gastrointestinal Survival.

  • 2022-11-16
  • Journal of Agricultural and Food Chemistry 70(47)
    • Hong Chen
    • Xiaoyu Wang
    • Yuan Yue
    • Xin Wang
    • Xuejun Zeng
    • Qi Guo
    • Xiaohai Yan
    • Gengan Du
    • Yahong Yuan
    • T. Yue

Abstract

Lactic acid bacteria can convert selenium (Se) from inorganic to organic and elemental forms, but the distribution and existence form of organic Se in the bacteria are not clear after Se enrichment, and the effects of selenization on the growth and nutritional value of strains also need to be studied. In this study, Pediococcus acidilactici MRS-7 could absorb up to 67% of inorganic Se and convert most of it into organic Se; about 75% of organic Se was selenoprotein, 2.7% was Se-polysaccharide, and 4.6% was Se-nucleic acid. Additionally, Se-enriched treatment increased the levels of amino acids and essential elements in P. acidilactici MRS-7. Finally, after Se enrichment, Se nanoparticles (SeNPs) were found on the surface of P. acidilactici MRS-7, but they had no harmful effect on its morphology, and its survival during gastrointestinal digestion was not affected, indicating that SeP has potential probiotic value in the food industry.

Keywords: Se-enriched Pediococcus acidilactici MRS-7; biochemical composition; gastrointestinal digestion; organic Se.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Pediococcus acidilacticiImproved Nutritional Value of SourdoughBeneficial
Moderate
Pediococcus acidilacticiMaintained Gastrointestinal HealthNeutral
Small
Pediococcus acidilacticiMaintained Morphological IntegrityNeutral
Small
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