Selenization of lactic acid bacteria, bifidobacteria and yeasts and their antioxidant properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722861%3A_____%2F20%3AN0000050" target="_blank" >RIV/26722861:_____/20:N0000050 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Selenization of lactic acid bacteria, bifidobacteria and yeasts and their antioxidant properties

Popis výsledku v původním jazyce

Krausová G., Kaňa A., Hyršlová I., Kantorová V., Medová K.: Selenization of lactic acid bacteria, bifidobacteria and yeasts and their antioxidant properties. Poster. 14th International Scientific Conference on Probiotics, Prebiotics, Gut Microbiota and Health, IPC 2020, 11.11.2020, virtual conference. Development of selenium-enriched forms of yeasts and recently also lactic acid bacteria (LAB) is gaining attention in the search for non-toxic and effective source of selenium (Se). As an essential trace element, Se supplementation via foods and dietary supplements is needed, especially in locations with Se-deficiency in the soil. We aimed to develop Se-enriched strains of yeasts and LAB and to test their properties, such as their Se bioaccummulation capacity and antioxidant properties before and after selenization, total Se content and Se-species as well as Se-nanoparticles produced by these microorganisms. For this purpose, 14 strains of LAB, bifidobacteria and yeasts were used. All the strains tested were able to grow in the presence of sodium selenite (10 mg/l) while their selenium uptake was confirmed by above mentioned analytical methods and by TEM, SEM-EDX. Se-nanoparticles incorporated intracellularly were found e.g. in the strain CCDM 272. The enrichment of the medium with selenium and its subsequent bioaccumulation led to an increase in antioxidant activity in all of the strains tested. However, the antioxidant capacity was most improved in yeasts and Lactococcus strains. Importantly, species- and strain-specific differences in their antioxidant properties were noted. All tested strains demonstrated good potential for selenium-enrichment, nevertheless, more in depth research has to be done in order to guarantee their safety.

Název v anglickém jazyce

Selenization of lactic acid bacteria, bifidobacteria and yeasts and their antioxidant properties

Popis výsledku anglicky

Krausová G., Kaňa A., Hyršlová I., Kantorová V., Medová K.: Selenization of lactic acid bacteria, bifidobacteria and yeasts and their antioxidant properties. Poster. 14th International Scientific Conference on Probiotics, Prebiotics, Gut Microbiota and Health, IPC 2020, 11.11.2020, virtual conference. Development of selenium-enriched forms of yeasts and recently also lactic acid bacteria (LAB) is gaining attention in the search for non-toxic and effective source of selenium (Se). As an essential trace element, Se supplementation via foods and dietary supplements is needed, especially in locations with Se-deficiency in the soil. We aimed to develop Se-enriched strains of yeasts and LAB and to test their properties, such as their Se bioaccummulation capacity and antioxidant properties before and after selenization, total Se content and Se-species as well as Se-nanoparticles produced by these microorganisms. For this purpose, 14 strains of LAB, bifidobacteria and yeasts were used. All the strains tested were able to grow in the presence of sodium selenite (10 mg/l) while their selenium uptake was confirmed by above mentioned analytical methods and by TEM, SEM-EDX. Se-nanoparticles incorporated intracellularly were found e.g. in the strain CCDM 272. The enrichment of the medium with selenium and its subsequent bioaccumulation led to an increase in antioxidant activity in all of the strains tested. However, the antioxidant capacity was most improved in yeasts and Lactococcus strains. Importantly, species- and strain-specific differences in their antioxidant properties were noted. All tested strains demonstrated good potential for selenium-enrichment, nevertheless, more in depth research has to be done in order to guarantee their safety.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40401 - Agricultural biotechnology and food biotechnology

Projekt

<a href="/cs/project/LTC20014" target="_blank" >LTC20014: Research of selenium-enriched lactic acid bacteria, bifidobacteria and yeasts and influence of low-pH stress exposure on their selenium biotransformation efficiency.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů