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| http://dx.doi.org/10.21037/hbsn.2019.02.03 | DOI Listing |
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Impact of dairy calf management practices on the intestinal tract microbiome pre-weaning.
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January 2025
Animal and Agriculture Department, Hartpury University, Gloucester, GL19 3BE, UK.
Microbiota in the gastrointestinal tract (GIT) consisting of the rumen and hindgut (the small intestine, cecum and colon) in dairy calves play a vital role in their growth and development. This review discusses the development of dairy calf intestinal microbiomes with an emphasis on the impact that husbandry and rearing management have on microbiome development, health and growth of pre-weaned dairy calves. The diversity and composition of the microbes that colonize the lower GIT (small and large intestine) can have a significant impact on the growth and development of the calf, through influence on nutrient metabolism, immune modulation, resistance or susceptibility to infection, production outputs and behaviour modification in adult life.
View Article and Find Full Text PDFIdentification of intestinal mediators of DBL-1/BMP immune signaling shaping gut microbiome composition.
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January 2025
Department of Integrative Biology, University of California, Berkeley, Berkeley, California, USA.
The composition of the gut microbiome is determined by a complex interplay of diet, host genetics, microbe-microbe interactions, abiotic factors, and stochasticity. Previous studies have demonstrated the importance of host genetics in community assembly of the gut microbiome and identified a central role for DBL-1/BMP immune signaling in determining the abundance of gut . However, the effects of DBL-1 signaling on gut bacteria were found to depend on its activation in extra-intestinal tissues, highlighting a gap in our understanding of the proximal factors that determine microbiome composition.
View Article and Find Full Text PDFHuman-derived microRNA 21 regulates indole and L-tryptophan biosynthesis transcripts in the gut commensal .
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January 2025
Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, Vienna, Austria.
Unlabelled: In the gut, microRNAs (miRNAs) produced by intestinal epithelial cells are secreted into the lumen and can shape the composition and function of the gut microbiome. Crosstalk between gut microbes and the host plays a key role in irritable bowel syndrome (IBS) and inflammatory bowel diseases, yet little is known about how the miRNA-gut microbiome axis contributes to the pathogenesis of these conditions. Here, we investigate the ability of miR-21, a miRNA that we found decreased in fecal samples from IBS patients, to associate with and regulate gut microbiome function.
View Article and Find Full Text PDFN1 derived lipoteichoic acid alleviates insulin resistance in association with modulation of the gut microbiota and amino acid metabolism.
Food Funct
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College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China.
This study aimed to investigate the effects of heat-killed N1 (HK-N1) and lipoteichoic acid (LTA) derived from it on alleviating insulin resistance by modulating the gut microbiota and amino acid metabolism. High-fat diet (HFD)-fed mice were administered live bacteria or HK-N1, and the results demonstrated that HK-N1 significantly reduced epididymal adipocyte size and serum low density lipoprotein-cholesterol, and improved insulin resistance by increasing the YY peptide and glucagon-like peptide levels. HK-N1 also modulated the gut microbiome composition, enhancing microbiota uniformity and reducing the abundance of , and .
View Article and Find Full Text PDFSelect microbial metabolites in the small intestinal lumen regulates vagal activity via receptor-mediated signaling.
iScience
February 2025
Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA 90095, USA.
The vagus nerve is proposed to enable communication between the gut microbiome and the brain, but activity-based evidence is lacking. We find that mice reared germ-free exhibit decreased vagal tone relative to colonized controls, which is reversed via microbiota restoration. Perfusing antibiotics into the small intestines of conventional mice, but not germ-free mice, acutely decreases vagal activity which is restored upon re-perfusion with intestinal filtrates from conventional, but not germ-free, mice.
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