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      Evaluación del efecto in vitro de extractos intra y extracelulares de Lactobacillus contra la genotoxicidad y el estrés oxidativo causado por la acrilamida Translated title: Assessment of the in vitro effect of intra and extracellular extracts of Lactobacillus against genotoxicity and oxidative stress caused by acrylamide

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          Abstract

          Resumen Introducción: la acrilamida se forma mediante la reacción de Maillard, por lo que se encuentra en muchos productos alimenticios sometidos a procesos térmicos, generando genotoxicidad y daños al ADN. Los estudios han reportado que los lactobacilos tienen la capacidad de generar compuestos con actividad antioxidante, antigenotóxica y antimutagénica, y es por esto que el presente trabajo pretende evaluar el efecto de cepas de Lactobacillus y sus extractos intra y extracelulares contra la genotoxicidad y el estrés oxidativo causado por la acrilamida. Métodos: se empleó una cepa de Lactobacillus casei Shirota y una cepa de Lactobacillus reuteri NRRL B-14171. Ambas fueron cultivadas en caldo MRS y sometidas a tratamientos mecánicos y enzimáticos para obtener los extractos extra e intracelulares. Los linfocitos fueron cultivados en medio RPMI, la peroxidación lipídica se evaluó por TBARS y la capacidad antioxidante se midió en los extractos extra e intracelulares con la técnica ABTS, empleando además una cepa de Saccharomyces cerevisiae RC 212 como modelo. La reducción de la peroxidación lipídica en los linfocitos se midió por TBARS y la reducción de la genotoxicidad mediante la reducción de la formación de micronúcleos en los linfocitos. Resultados: ambas cepas evaluadas, así como sus extractos intra y extracelulares, mostraron capacidad de contrarrestar el estrés oxidativo y la genotoxicidad causada por la acrilamida. Conclusión: los resultados encontrados, sugieren que el empleo de extractos intra y extracelulares de ambas cepas podría ser una alternativa para reducir los efectos de genotoxicidad y estrés oxidativo causados por la acrilamida sin la necesidad de requerir una estructura viable..

          Translated abstract

          Abstract Introduction: acrylamide is formed by the Maillard reaction and is found in many food products subjected to thermal processes, generating genotoxicity and DNA damage. Studies have reported that lactobacilli have the ability to generate compounds with antioxidant, antigenotoxic and antimutagenic activity, which is why the present work aims to evaluate the effect of Lactobacillus strains and their intra and extracellular extracts against genotoxicity and oxidative stress as caused by acrylamide. Methods: a strain of Lactobacillus casei Shirota and a strain of Lactobacillus reuteri NRRL B-14171 were used, both were cultured in MRS broth and subjected to mechanical and enzymatic treatments to obtain extra and intracellular extracts. Lymphocytes were cultured in RPMI medium. Lipid peroxidation was evaluated by TBARS and the antioxidant capacity was measured in the extra and intracellular extracts with the ABTS technique, also using a strain of Saccharomyces cerevisiae RC 212 as a model. The reduction of lipid peroxidation in lymphocytes was measured by TBARS and the reduction of genotoxicity by reducing the formation of micronuclei in lymphocytes. Results: both strains evaluated, as well as their intra and extracellular extracts, showed the ability to counteract oxidative stress and genotoxicity caused by acrylamide. Conclusion: the results found suggest that the use of intra and extracellular extracts of both strains could be an alternative to reduce the effects of genotoxicity and oxidative stress caused by acrylamide without the need for a viable structure.

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          Two antioxidative lactobacilli strains as promising probiotics.

          Two antioxidative strains tentatively identified as Lactobacillus fermentum, E-3 and E-18, were isolated from intestinal microflora of a healthy child. Survival time of these strains in the presence of reactive oxygen species (ROS), like hydrogen peroxide, superoxide anions and hydroxyl radicals, was significantly increased compared with a non-antioxidative strain, and also was quite similar to a highly ROS resistant strain of Salmonella typhimurium. E-3 and E-8 contain a remarkable level of glutathione, express Mn-SOD, which is important for the prevention of lipid peroxidation, and secrete hydrogen peroxide. Their significant antimicrobial activity combined with antioxidative properties may serve as defensive principles in the intestinal microbial ecosystem and overcome exo- and endogenous oxidative stress.
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            Acrylamide in foods: a review of the science and future considerations.

            Acrylamide occurs in foods commonly consumed in diets worldwide. It is formed from the reaction of reducing sugars (e.g., glucose or fructose) with the amino acid asparagine via the Maillard reaction, which occurs during heat processing of foods, primarily those derived from plant origin, such as potato and cereal products, above 120°C (248°F). The majority of epidemiological studies concerning potential relationships between acrylamide consumption and different types of cancer have indicated no increased risk, except with a few types that warrant further study. Efforts to reduce the formation of acrylamide in food products have resulted in some successes, but there is no common approach that works for all foods. Reduction in some foods is probably not possible. The results from a major toxicological study (aqueous intake of acrylamide by rats and mice) are in the process of being released. The status of current knowledge in these areas is reviewed.
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              Lactobacillus plantarum AR501 Alleviates the Oxidative Stress of D-Galactose-Induced Aging Mice Liver by Upregulation of Nrf2-Mediated Antioxidant Enzyme Expression

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                Author and article information

                Journal
                nh
                Nutrición Hospitalaria
                Nutr. Hosp.
                Grupo Arán (Madrid, Madrid, Spain )
                0212-1611
                1699-5198
                August 2023
                : 40
                : 4
                : 811-818
                Affiliations
                [1] Guadalajara orgnameUniversidad de Guadalajara orgdiv1Centro Universitario de Ciencias Exactas e Ingenierías Mexico
                Article
                S0212-16112023000500018 S0212-1611(23)04000400018
                10.20960/nh.04241
                379c2dc7-8e2e-457e-b430-6a0a7dfc89ba

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 15 May 2022
                : 05 November 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 18, Pages: 8
                Product

                SciELO Spain

                Categories
                Trabajo Original

                Lactobacilos,Antioxidante,Acrylamide,Extracts,Lactobacillus,Acrilamida,Antioxidant,Extractos

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