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gut microbiota

  • Modulating the Gut Microbiota of Humans by Dietary Intervention with Plant Glycans
    Minireview | Spotlight
    Modulating the Gut Microbiota of Humans by Dietary Intervention with Plant Glycans

    The human colon contains a community of microbial species, mostly bacteria, which is often referred to as the gut microbiota. The community is considered essential to human well-being by conferring additional energy-harvesting capacity, niche exclusion of pathogens, and molecular signaling activities that are integrated into human physiological processes.

    Gerald W. Tannock
  • Open Access
    Three Candidate Probiotic Strains Impact Gut Microbiota and Induce Anergy in Mice with Cow's Milk Allergy
    Public and Environmental Health Microbiology | Spotlight
    Three Candidate Probiotic Strains Impact Gut Microbiota and Induce Anergy in Mice with Cow's Milk Allergy

    We showed previously that three probiotic strains, i.e., Lactobacillus rhamnosus LA305, L. salivarius LA307, and Bifidobacterium longum subsp. infantis LA308, exerted different preventive effects in a mouse model of cow’s...

    Nathalie Esber, Aurélie Mauras, Johanne Delannoy, Chantal Labellie, Camille Mayeur, Marie-Aurore Caillaud, Toma Kashima, Landry Souchaud, Ioannis Nicolis, Nathalie Kapel, Anne-Judith Waligora-Dupriet
  • Sharing a β-Glucan Meal: Transcriptomic Eavesdropping on a <span class="named-content genus-species" id="named-content-1">Bacteroides ovatus</span>-<span class="named-content genus-species" id="named-content-2">Subdoligranulum variabile</span>-<span class="named-content genus-species" id="named-content-3">Hungatella hathewayi</span> Consortium
    Food Microbiology
    Sharing a β-Glucan Meal: Transcriptomic Eavesdropping on a Bacteroides ovatus-Subdoligranulum variabile-Hungatella hathewayi Consortium

    The microbial community, mostly composed of bacterial species, residing in the human gut degrades and ferments polysaccharides derived from plants (dietary fiber) that would not otherwise be digested. In this way, the collective metabolic actions of community members extract additional energy from the human diet. While the variety of bacteria present in the microbial community is well known, the formation of bacterial consortia, and the...

    Manuela Centanni, Ian M. Sims, Tracey J. Bell, Ambarish Biswas, Gerald W. Tannock
  • An 1,4-α-Glucosyltransferase Defines a New Maltodextrin Catabolism Scheme in <span class="named-content genus-species" id="named-content-1">Lactobacillus acidophilus</span>
    Enzymology and Protein Engineering
    An 1,4-α-Glucosyltransferase Defines a New Maltodextrin Catabolism Scheme in Lactobacillus acidophilus

    The degradation of starch in the small intestine generates short linear and branched α-glucans. The latter are poorly digestible by humans, rendering them available to the gut microbiota, e.g., lactobacilli adapted to the small intestine and considered beneficial to health. This study unveils a previously unknown scheme of maltooligosaccharide (MOS) catabolism via the concerted activity of an 1,4-α-glucosyltransferase together with a...

    Susan Andersen, Marie S. Møller, Jens-Christian N. Poulsen, Michael J. Pichler, Birte Svensson, Leila Lo Leggio, Yong Jun Goh, Maher Abou Hachem
  • The Gut Microbiota of Laying Hens and Its Manipulation with Prebiotics and Probiotics To Enhance Gut Health and Food Safety
    Minireview
    The Gut Microbiota of Laying Hens and Its Manipulation with Prebiotics and Probiotics To Enhance Gut Health and Food Safety

    The microbiota plays a vital role in maintaining gut health and influences the overall performance of chickens. Most gut microbiota-related studies have been performed in broilers, which have different microbial communities compared to those of layers. The normal gut microbiota of laying chickens is dominated by Proteobacteria, Firmicutes, Bacteroidetes, Fusobacteria, and Actinobacteria at...

    Samiullah Khan, Robert J. Moore, Dragana Stanley, Kapil K. Chousalkar
  • Prebiotics Inhibit Proteolysis by Gut Bacteria in a Host Diet-Dependent Manner: a Three-Stage Continuous <em>In Vitro</em> Gut Model Experiment
    Food Microbiology
    Prebiotics Inhibit Proteolysis by Gut Bacteria in a Host Diet-Dependent Manner: a Three-Stage Continuous In Vitro Gut Model Experiment

    Dietary protein levels are generally higher in Western populations than in the world average. We challenged three-stage continuous colonic model systems containing high protein levels and confirmed the production of potentially harmful metabolites from proteolysis, especially replicates of the transverse and distal colon. Fermentations of proteins with a prebiotic supplementation resulted in a change in the human gut microbiota and...

    Xuedan Wang, Glenn R. Gibson, Manuela Sailer, Stephan Theis, Robert A. Rastall
  • Ecological and Ontogenetic Components of Larval Lake Sturgeon Gut Microbiota Assembly, Successional Dynamics, and Ecological Evaluation of Neutral Community Processes
    Microbial Ecology
    Ecological and Ontogenetic Components of Larval Lake Sturgeon Gut Microbiota Assembly, Successional Dynamics, and Ecological Evaluation of Neutral Community Processes

    We quantified the effects of environment (diet and water sources) and host early ontogenetic development on the diversity of and compositional changes in gut microbial communities based on massively parallel sequencing of the 16S rRNA genes from the GI tracts of larval lake sturgeon (Acipenser fulvescens). The gut microbial community diversity declined and the...

    Shairah Abdul Razak, Kim T. Scribner
  • Deciphering the Bifidobacterial Populations within the Canine and Feline Gut Microbiota
    Environmental Microbiology
    Deciphering the Bifidobacterial Populations within the Canine and Feline Gut Microbiota

    Currently, domesticated dogs and cats are the most cherished companion animals for humans, and concerns about their health and well-being are therefore important. In this context, the gut microbiota plays a crucial role in maintaining and promoting host health. However, despite the social relevance of domesticated dogs and cats, their intestinal microbial communities are still far from being completely understood. In this study, the...

    Giulia Alessandri, Christian Milani, Leonardo Mancabelli, Giulia Longhi, Rosaria Anzalone, Gabriele Andrea Lugli, Sabrina Duranti, Francesca Turroni, Maria Cristina Ossiprandi, Douwe van Sinderen, Marco Ventura
  • <span class="named-content genus-species" id="named-content-1">Akkermansia muciniphila</span> Prevents Fatty Liver Disease, Decreases Serum Triglycerides, and Maintains Gut Homeostasis
    Environmental Microbiology
    Akkermansia muciniphila Prevents Fatty Liver Disease, Decreases Serum Triglycerides, and Maintains Gut Homeostasis

    This study investigated the effect of Akkermansia muciniphila on fatty liver disease. Although some research about the effects of A. muciniphila on host health has been published, study of the relationship between A. muciniphila administration and fatty liver, as well as changes in the gut microbiota, has not been conducted. In this study, we...

    Sejeong Kim, Yewon Lee, Yujin Kim, Yeongeun Seo, Heeyoung Lee, Jimyeong Ha, Jeeyeon Lee, Yukyung Choi, Hyemin Oh, Yohan Yoon
  • Substrate Use Prioritization by a Coculture of Five Species of Gut Bacteria Fed Mixtures of Arabinoxylan, Xyloglucan, β-Glucan, and Pectin
    Food Microbiology
    Substrate Use Prioritization by a Coculture of Five Species of Gut Bacteria Fed Mixtures of Arabinoxylan, Xyloglucan, β-Glucan, and Pectin

    This study addresses the question as to how bacterial species, characteristic of the human gut microbiota, collectively utilize mixtures of plant polysaccharides such as are found in dietary fiber. Five bacterial species with the capacity to degrade polymers and/or produce acidic fermentation products detectable in human feces were used in the experiments. The bacteria showed preferential use of certain polysaccharides over others for...

    Yafei Liu, Anne-Louise Heath, Barbara Galland, Nancy Rehrer, Lynley Drummond, Xi-Yang Wu, Tracey J. Bell, Blair Lawley, Ian M. Sims, Gerald W. Tannock

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