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Artículo

Survival of selenium-enriched lactic acid bacteria in a fermented drink under storage and simulated gastro-intestinal digestion

Martínez, Fernando GabrielIcon ; Cuencas Barrientos, María E.; Mozzi, Fernanda BeatrizIcon ; Pescuma, MicaelaIcon
Fecha de publicación: 09/2019
Editorial: Elsevier Science
Revista: Food Research International
ISSN: 0963-9969
e-ISSN: 1873-7145
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioprocesamiento Tecnológico, Biocatálisis, Fermentación

Resumen

Selenium (Se), which is present as SeCys in seleno-proteins, is involved in cancer prevention, thyroid functioning, and pathogen inhibition. Se is incorporated in the diet through Se-containing foods. Some lactic acid bacteria (LAB) can biotransform selenite (toxic) into Se-nanoparticles (SeNPs) and Se-amino acids. To exert their beneficial properties in the host, bacteria should survive the harsh conditions of the gastrointestinal tract and during food storage. We evaluated whether selenization of LAB influenced bacterial growth and survival during gastrointestinal digestion and after storage when present in a fermented fruit juice-milk (FJM) beverage. Lactobacillus brevis CRL 2051 and Fructobacillus tropaeoli CRL 2034 were grown in MRS with and without selenite, and used to inoculate the FJM matrix. Selenization had no effect on LAB growth (9.54–9.9 log CFU/mL) in the FJM drink. The presence of SeNPs was confirmed for both selenized strains in the FJM beverage; however, the highest Se concentration (100 μg/L) was detected for the fermented beverage with selenized L. brevis. Under storage conditions 1.1 log CFU/ml decrease in cell count of selenized cells of L. brevis was observed, while no effect on cell viability was detected for non-selenized L. brevis or both selenized and control cells of F. tropaeoli. Resistance of L. brevis during digestion of the fermented FJM beverage was not affected by selenization. Contrarily, an increase (1 log CFU/mL) in the resistance of F. tropaeoli was observed when cells were selenized. After digestion, Se was detected in the soluble fraction of the beverage fermented by both strains, being higher for L. brevis (23.6 μg/L). Although selenization did not exert a drastic effect on strains´ survival during storage and digestion, microbial selenization previous to food fermentation could be an interesting tool for Se enrichment avoiding thus the addition of toxic Se salts.
Palabras clave: DIGESTION AND STORAGE OF FERMENTED DRINKS , FERMENTED DRINKS , SELENIUM , SELENO-NANOPARTICLES
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/96603
DOI: http://dx.doi.org/10.1016/j.foodres.2019.04.057
URL: https://www.sciencedirect.com/science/article/pii/S0963996919302893
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Articulos(CERELA)
Articulos de CENTRO DE REFERENCIA PARA LACTOBACILOS (I)
Citación
Martínez, Fernando Gabriel; Cuencas Barrientos, María E.; Mozzi, Fernanda Beatriz; Pescuma, Micaela; Survival of selenium-enriched lactic acid bacteria in a fermented drink under storage and simulated gastro-intestinal digestion; Elsevier Science; Food Research International; 123; 9-2019; 115-124
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