Papers by Sandra Torriani
Beneficial Microbes, 2019
Diet-related modulation of gut microbiota and its metabolic activity represents an intriguing res... more Diet-related modulation of gut microbiota and its metabolic activity represents an intriguing research context, particularly in the case of disorders related to imbalances in gut microbial communities. We here explored the effects of Bacillus coagulans GBI-30, 6086 (BC30), β-glucans, and innovative whole-grain pastas, with or without these functional ingredients, on gut microbiota from three groups of children, presenting different susceptibility to type 1 diabetes, by using the well-controlled TNO in vitro model of the proximal colon (TIM-2). Short- and branched-chain fatty acids production and microbiota composition were assessed by means of gas chromatography and 16S rRNA gene profiling, respectively. In most cases, in vitro dietary interventions caused microbiota-dependent modulations as a result of intergroup variability, but also specific changes in microbial groups were shared between the three microbiotas, highlighting specific diet-microbial taxa connections.
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Journal of Cereal Science, 2015
Abstract A new functional pasta using a durum wheat flour rich in polyphenols, with added barley ... more Abstract A new functional pasta using a durum wheat flour rich in polyphenols, with added barley β-glucan and Bacillus coagulans GBI-30, 6086 was developed. Chemical, nutritional and microbiological analyses were carried out to perform a comprehensive evaluation of the final product quality. The settled debranning process of durum wheat produced a flour rich in proteins and phenolic acids (18.18% dm and 392.1 μg/g respectively). These raw material characteristics had a positive influence on pasta cooking performances as well as on its nutritional profile due to the high content of bound ferulic acid content (94% of total phenolic acids). The probiotic strain remained viable during the pasta-making and cooking processes, and its amount in cooked pasta (about 9.0 log CFU/100 g) would be considered sufficient to exert beneficial effects on consumer. The glycemic index of pasta measured in healthy volunteers was 59.7 and the functional ingredients addition did not affect the postprandial glycemic response of pasta in healthy volunteers. The information provided here suggests that the new developed functional pasta could represent a high-quality product for its suitable nutritional appeal and potential beneficial properties.
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Biotechnology Techniques, 1994
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Foods
Kombucha is a fermented tea with a long history of production and consumption. It has been gainin... more Kombucha is a fermented tea with a long history of production and consumption. It has been gaining popularity thanks to its refreshing taste and assumed beneficial properties. The microbial community responsible for tea fermentation—acetic acid bacteria (AAB), yeasts, and lactic acid bacteria (LAB)—is mainly found embedded in an extracellular cellulosic matrix located at the liquid–air interphase. To optimize the production process and investigate the contribution of individual strains, a collection of 26 unique strains was established from an artisanal-scale kombucha production; it included 13 AAB, 12 yeasts, and one LAB. Among these, distinctive strains, namely Novacetimonas hansenii T7SS-4G1, Brettanomyces bruxellensis T7SB-5W6, and Zygosaccharomyces parabailii T7SS-4W1, were used in mono- and co-culture fermentations. The monocultures highlighted important species-specific differences in the metabolism of sugars and organic acids, while binary co-cultures demonstrated the roles ...
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Fermentation, 2021
Lactic acid bacteria (LAB) perform the process of malolactic fermentation (MLF) in wine. Availabi... more Lactic acid bacteria (LAB) perform the process of malolactic fermentation (MLF) in wine. Availability of oxygen and nitrogen nutrients could influence LAB growth, malolactic activity, and other metabolic pathways, impacting the subsequent wine quality. The impact of these two factors has received limited investigation within LAB, especially on a transcriptome level. The aim of this study was to evaluate metabolic changes in the strain Lactiplantibacillus plantarum IWBT B063, growing in synthetic grape juice medium (GJM) under different oxygen exposure conditions, and with low availability of nitrogen-based nutrients. Next-generation sequencing was used to analyze expression across the transcriptome (RNA-seq), in combination with conventional microbiological and chemical analysis. L. plantarum consumed the malic acid present in all the conditions evaluated, with a slight delay and impaired growth for nitrogen limitation and for anaerobiosis. Comparison of L. plantarum transcriptome d...
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Il capitolo descrive i batteri lattici presenti nel vino, il loro ruolo nel miglioramento della s... more Il capitolo descrive i batteri lattici presenti nel vino, il loro ruolo nel miglioramento della sua qualit\ue0 e i difetti che possono causare
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Applied and Environmental Microbiology, 1999
PCR assays with primers targeted to the genes encoding 16S rRNA were developed for detection of d... more PCR assays with primers targeted to the genes encoding 16S rRNA were developed for detection of dairy propionibacteria. Propionibacterium thoenii specific oligonucleotide PT3 was selected after partial resequencing. Tests allowed the detection of less than 10 cells per reaction from milk and cheese and 10 2 cells per reaction from forage and soil.
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Food Bioscience, 2018
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PloS one, 2017
The gut microbiome is the full set of microbes living in the gastrointestinal tract and is emergi... more The gut microbiome is the full set of microbes living in the gastrointestinal tract and is emerging as an important dynamic/fluid system that, if altered by environmental, dietetic or pharmacological factors, could considerably influence drug response. However, the immunosuppressive drug-induced modifications of this system are still poorly defined. We employed an innovative bioinformatics approach to assess differences in the whole-gut microbial metagenomic profile of 20 renal transplant recipients undergoing maintenance treatment with two different immunosuppressive protocols. Nine patients were treated with everolimus plus mycophenolate mofetil (EVE+MMF group), and 11 patients were treated with a standard therapy with tacrolimus plus mycophenolate mofetil (TAC+MMF group). A statistical analysis of comparative high-throughput data demonstrated that although similar according to the degree of Shannon diversity (alpha diversity) at the taxonomic level, three functional genes clearly...
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Annals of Microbiology
Abstract: In this study epiphytic yeasts were isolated from non-decayed fruit wounds and the poss... more Abstract: In this study epiphytic yeasts were isolated from non-decayed fruit wounds and the possibility to use them as potential biological control agents for postharvest rot diseases was investigated. Of the 121 isolates, eight showed, in preliminary challenge experiments, inhibition of Monilinia laxa and Botryotinia fuckeliana. Six strains were classified as Metschnikowia pulcherrima, which has not been employed previously as a biocontrol agent on peach and table grape fruits, while the other two strains were included in the Kloeckera apiculata and Hanseniaspora guilliermondii species. M. pulcherrima strains were effective in reducing the incidence of brown rot in peaches and gray mold in table grapes (from 49 to 89% depending on the strain and fruit), but their biocontrol activities were not enhanced by the addition of calcium chloride. The colonization and persistance of M. pulcherrima strains on berry wounds were also observed during low storage temperature. The results indica...
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Frontiers in Microbiology, 2015
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Molecular Detection of Foodborne Pathogens, 2009
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Food Control, 2015
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International Journal of Food Microbiology, 2014
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Papers by Sandra Torriani