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environment, T-cells, diet, microbes

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https://www.readbyqxmd.com/read/27892936/influence-of-early-life-exposure-host-genetics-and-diet-on-the-mouse-gut-microbiome-and-metabolome
#1
Antoine M Snijders, Sasha A Langley, Young-Mo Kim, Colin J Brislawn, Cecilia Noecker, Erika M Zink, Sarah J Fansler, Cameron P Casey, Darla R Miller, Yurong Huang, Gary H Karpen, Susan E Celniker, James B Brown, Elhanan Borenstein, Janet K Jansson, Thomas O Metz, Jian-Hua Mao
Although the gut microbiome plays important roles in host physiology, health and disease(1), we lack understanding of the complex interplay between host genetics and early life environment on the microbial and metabolic composition of the gut. We used the genetically diverse Collaborative Cross mouse system(2) to discover that early life history impacts the microbiome composition, whereas dietary changes have only a moderate effect. By contrast, the gut metabolome was shaped mostly by diet, with specific non-dietary metabolites explained by microbial metabolism...
November 28, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27045424/gastro-intestinal-tract-the-leading-role-of-mucosal-immunity
#2
Anna Steinert, Katarina Radulovic, Jan Niess
An understanding of mucosal immunity is essential for the comprehension of intestinal diseases that are often caused by a complex interplay between host factors, environmental influences and the intestinal microbiota. Not only improvements in endoscopic techniques, but also advances in high throughput sequencing technologies, have expanded knowledge of how intestinal diseases develop. This review discusses how the host interacts with intestinal microbiota by the direct contact of host receptors with highly conserved structural motifs or molecules of microbes and also by microbe-derived metabolites (produced by the microbe during adaptation to the gut environment), such as short-chain fatty acids, vitamins, bile acids and amino acids...
2016: Swiss Medical Weekly
https://www.readbyqxmd.com/read/24390308/gut-microbiota-metabolism-of-dietary-fiber-influences-allergic-airway-disease-and-hematopoiesis
#3
Aurélien Trompette, Eva S Gollwitzer, Koshika Yadava, Anke K Sichelstiel, Norbert Sprenger, Catherine Ngom-Bru, Carine Blanchard, Tobias Junt, Laurent P Nicod, Nicola L Harris, Benjamin J Marsland
Metabolites from intestinal microbiota are key determinants of host-microbe mutualism and, consequently, the health or disease of the intestinal tract. However, whether such host-microbe crosstalk influences inflammation in peripheral tissues, such as the lung, is poorly understood. We found that dietary fermentable fiber content changed the composition of the gut and lung microbiota, in particular by altering the ratio of Firmicutes to Bacteroidetes. The gut microbiota metabolized the fiber, consequently increasing the concentration of circulating short-chain fatty acids (SCFAs)...
February 2014: Nature Medicine
https://www.readbyqxmd.com/read/24311313/a-simulated-mucus-layer-protects-lactobacillus-reuteri-from-the-inhibitory-effects-of-linoleic-acid
#4
R De Weirdt, E Coenen, B Vlaeminck, V Fievez, P Van den Abbeele, T Van de Wiele
Lactobacillus reuteri is a commensal, beneficial gut microbe that colonises the intestinal mucus layer, where it makes close contact with the human host and may significantly affect human health. Here, we investigated the capacity of linoleic acid (LA), the most common polyunsaturated fatty acid (PUFA) in a Western-style diet, to affect L. reuteri ATCC PTA 6475 prevalence and survival in a simulated mucus layer. Short-term (1 h) survival and mucin-agar adhesion assays of a log-phase L. reuteri suspension in intestinal water demonstrated that the simulated mucus layer protected L...
December 1, 2013: Beneficial Microbes
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