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https://www.readbyqxmd.com/read/29334455/modulating-the-molybdenum-coordination-sphere-of-escherichia-coli-trimethylamine-n-oxide-reductase
#1
Paul Kaufmann, Benjamin R Duffus, Biljana Mitrova, Chantal Iobbi-Nivol, Christian Teutloff, Manfred Nimtz, Lothar Jänsch, Ulla Wollenberger, Silke Leimkühler
The well-studied enterobacterium Escherichia coli present in the human gut is able to reduce TMAO to trimethylamine (TMA) during anaerobic respiration. The TMAO reductase TorA is a monomeric, bis-molybdopterin guanine dinucleotide (bis-MGD) cofactor-containing enzyme belonging to the dimethylsulfoxide (DMSO) reductase family of molybdoenzymes. We report on a system for the in vitro reconstitution of TorA with molybdenum cofactors (Moco) from different sources. Higher TMAO reductase activities for TorA were obtained when using Moco-sources containing a sulfido ligand at the molybdenum atom...
January 15, 2018: Biochemistry
https://www.readbyqxmd.com/read/29333864/non-digestible-carbohydrates-in-infant-formula-as-substitution-for-human-milk-oligosaccharide-functions-effects-on-microbiota-and-gut-maturation
#2
Renate Akkerman, Marijke M Faas, Paul de Vos
Human milk (HM) is the golden standard for nutrition of newborn infants. Human milk oligosaccharides (HMOs) are abundantly present in HM and exert multiple beneficial functions, such as support of colonization of the gut microbiota, reduction of pathogenic infections and support of immune development. HMO-composition is during lactation continuously adapted by the mother to accommodate the needs of the neonate. Unfortunately, for many valid reasons not all neonates can be fed with HM and are either totally or partly fed with cow-milk derived infant formulas, which do not contain HMOs...
January 15, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29333697/lactic-acid-bacteria-may-impact-intestinal-barrier-function-by-modulating-goblet-cells
#3
Chengcheng Ren, Jelleke Dokter-Fokkens, Susana Figueroa Lozano, Qiuxiang Zhang, Bart J de Haan, Hao Zhang, Marijke M Faas, Paul de Vos
SCOPE: Lactic acid bacteria (LAB) are recognized to promote gastrointestinal health by mechanisms that are not fully understood. LABs might modulate the mucus and thereby enhance intestinal barrier function. Herein, we investigated effects of different LAB strains and species on goblet cell genes involved in mucus synthesis. METHODS AND RESULTS: Gene expression profiles of goblet cell-associated products (mucin MUC2, trefoil factor 3, resistin-like molecule β, carbohydrate sulfotransferase 5, and galactose-3-O-sulfotransferase 2) induced by LAB or their derived conditioned medium in human goblet cell line LS174T were studied...
January 15, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29333610/clinical-features-and-treatment-of-nonalcoholic-fatty-liver-disease-across-the-asia-pacific-region-the-go-asia-initiative
#4
W-K Chan, S Treeprasertsuk, K Imajo, A Nakajima, Y Seki, K Kasama, S Kakizaki, J-G Fan, M J Song, S K Yoon, Y-Y Dan, L Lesmana, K-Y Ho, K-L Goh, V W-S Wong
BACKGROUND: The Gut and Obesity Asia (GO ASIA) workgroup was formed to study the relationships between obesity and gastrointestinal diseases in the Asia Pacific region. AIM: To study factors associated with nonalcoholic steatohepatitis (NASH) and advanced fibrosis, and medical treatment of biopsy-proven nonalcoholic fatty liver disease (NAFLD) patients. METHODS: Retrospective study of biopsy-proven NAFLD patients from centres in the GO ASIA Workgroup...
January 14, 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29333342/is-there-a-link-between-aging-and-microbiome-diversity-in-exceptional-mammalian-longevity
#5
Graham M Hughes, John Leech, Sébastien J Puechmaille, Jose V Lopez, Emma C Teeling
A changing microbiome has been linked to biological aging in mice and humans, suggesting a possible role of gut flora in pathogenic aging phenotypes. Many bat species have exceptional longevity given their body size and some can live up to ten times longer than expected with little signs of aging. This study explores the anal microbiome of the exceptionally long-lived Myotis myotis bat, investigating bacterial composition in both adult and juvenile bats to determine if the microbiome changes with age in a wild, long-lived non-model organism, using non-lethal sampling...
2018: PeerJ
https://www.readbyqxmd.com/read/29333111/diet-gut-microbiota-and-colorectal-cancer-prevention-a-review-of-potential-mechanisms-and-promising-targets-for-future-research
#6
Mingyang Song, Andrew T Chan
Diet plays an important role in the development of colorectal cancer. Emerging data have implicated the gut microbiota in colorectal cancer. Diet is a major determinant for the gut microbial structure and function. Therefore, it has been hypothesized that alterations in gut microbes and their metabolites may contribute to the influence of diet on the development of colorectal cancer. We review several major dietary factors that have been linked to gut microbiota and colorectal cancer, including major dietary patterns, fiber, red meat and sulfur, and obesity...
December 2017: Current Colorectal Cancer Reports
https://www.readbyqxmd.com/read/29332637/pilot-rct-of-an-integrative-group-therapy-for-patients-with-refractory-irritable-bowel-syndrome-isrctn02977330
#7
S Berens, E Stroe-Kunold, F Kraus, J Tesarz, A Gauss, B Niesler, W Herzog, R Schaefert
OBJECTIVE: Different forms of psychotherapeutic treatments have been proven effective in irritable bowel syndrome (IBS), but disorder-oriented and integrative concepts are still rare. Therefore, we implemented and evaluated an integrative group therapeutic concept within an interdisciplinary tertiary care clinic for functional gastrointestinal disorders (FGIDs). AIMS: present our integrative group concept, assess feasibility issues, and evaluate efficacy. METHODS: A pilot-RCT with a randomized controlled wait-listed group design was conducted...
February 2018: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29331880/preventive-effects-of-indole-3-carbinol-against-alcohol-induced-liver-injury-in-mice-via-antioxidant-anti-inflammatory-and-anti-apoptotic-mechanisms-role-of-gut-liver-adipose-tissue-axis
#8
Youngshim Choi, Mohamed A Abdelmegeed, Byoung-Joon Song
Indole-3-carbinol (I3C), found in Brassica family vegetables, exhibits antioxidant, anti-inflammatory, and anti-cancerous properties. Here, we aimed to evaluate the preventive effects of I3C against ethanol (EtOH)-induced liver injury and study the protective mechanism(s) by using the well-established chronic-plus-binge alcohol exposure model. The preventive effects of I3C were evaluated by conducting various histological, biochemical, and real-time PCR analyses in mouse liver, adipose tissue, and colon, since functional alterations of adipose tissue and intestine can also participate in promoting EtOH-induced liver damage...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29331731/deoxynivalenol-gut-microbiota-and-immunotoxicity-a-potential-approach
#9
REVIEW
Yuxiao Liao, Zhao Peng, Liangkai Chen, Andreas K Nüssler, Liegang Liu, Wei Yang
Deoxynivalenol (DON, vomitoxin) is the most frequent mycotoxin in grains and grain products. DON contamination in fodder and food is a serious threat for health, since it impairs the immune and gastrointestinal systems of both human and animals. Gut microbiota seems to play a more and more important part in human and animals' health according to related researches. Previous studies implied some associations among gut microbiota, DON and immune system. For example, DON affects immune system as well as the composition and abundance of gut microbiota, and the latter influences immune system as well...
January 10, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29331526/valerate-production-by-megasphaera-elsdenii-isolated-from-pig-feces
#10
Shota Yoshikawa, Ryosuke Araoka, Yu Kajihara, Toshiyuki Ito, Hirokuni Miyamoto, Hiroaki Kodama
Megasphaera elsdenii is able to produce several short-chain fatty acids (SCFAs), such as acetate, propionate, butyrate, and valerate. These SCFAs serve as an energy source for host animals and play an important role in gut health. In this study, M. elsdenii was isolated from pig feces that had been collected from two farms located in distinct areas of Japan. These M. elsdenii isolates were genotyped, and 7 representative strains were selected. When these 7 strains and M. elsdenii JCM 1772T were cultured with lactate for 24 h, all 7 strains produced valerate as a predominant SCFA...
January 11, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29331497/dietary-antioxidant-micronutrients-alter-mucosal-inflammatory-risk-in-a-murine-model-of-genetic-and-microbial-susceptibility
#11
Joseph F Pierre, Reinhard Hinterleitner, Romain Bouziat, Nathan A Hubert, Vanessa Leone, Jun Miyoshi, Bana Jabri, Eugene B Chang
Inflammatory bowel diseases (IBD) are caused by the convergence of microbial, environmental, and genetic factors. Diet significantly alters these interactions by affecting both the host and microbiome. Using a mucosal inflammatory model that resembles the human condition of ileal pouchitis, we investigated the effects of Control (CONT) or Antioxidant (AOX) diet, containing pharmacologically relevant levels of 4 micronutrients, on disease risk in wild-type and IL-10-/- animals following surgical self-filling (SF) ileal blind loop placement...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29331341/effects-of-the-gut-liver-axis-on-ischemia-mediated-hepatocellular-carcinoma-recurrence-in-the-mouse-liver
#12
Lorenzo A Orci, Stéphanie Lacotte, Vaihere Delaune, Florence Slits, Graziano Oldani, Vladimir Lazarevic, Carlo Rossetti, Laura Rubbia-Brandt, Philippe Morel, Christian Toso
BACKGROUND & AIMS: There is growing evidence that liver graft ischemia-reperfusion (I/R) is a risk factor for hepatocellular carcinoma (HCC) recurrence, but the involved mechanisms are unclear. Here, we tested the hypothesis that mesenteric congestion due to portal blood flow interruption induces endotoxin-mediated Toll-Like Receptor 4 (Tlr4) engagement, resulting in elevated liver cancer burden. We also assessed the role of remote ischemic preconditioning (RIPC) in this context. METHODS: C57Bl/6j mice were exposed to standardized models of liver I/R injury and RIPC, by occluding hepatic and femoral blood vessels...
January 10, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29331105/dietary-factors-modulate-colonic-tumorigenesis-through-the-interaction-of-gut-microbiota-and-host-chloride-channels
#13
Yong Zhang, Chao Kang, Xiao-Lan Wang, Min Zhou, Meng-Ting Chen, Xiao-Hui Zhu, Kai Liu, Bin Wang, Qian-Yong Zhang, Jun-Dong Zhu, Man-Tian Mi
SCOPE: In recent decades, the association between diet, gut microbiota and the risk of colorectal cancer (CRC) has been established. Gut microbiota and associated metabolites, such as bile acids and butyrate, are now known to play a key role in CRC development. The aim of this study was to identify the progression to CRC is influenced by cholic acid, sodium butyrate, a high-fat diet or different dose of dihydromyricetin (DMY) interacted with gut microbiota. METHODS AND RESULTS: An AOM/DSS (azoxymethan/dextran sodium sulfate) model was established to study the gut microbiota compsition before and after tumor formation during colitis-induced tumorigenesis...
January 13, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29330512/inactivated-rotavirus-vaccine-by-parenteral-administration-induces-mucosal-immunity-in-mice
#14
Theresa K Resch, Yuhuan Wang, Sung-Sil Moon, Jessica Joyce, Song Li, Mark Prausnitz, Baoming Jiang
To improve the safety and efficacy of oral rotavirus vaccines, we developed an inactivated rotavirus vaccine (IRV) for parenteral administration. Since it remains unknown whether parenteral vaccination can induce mucosal immunity, we performed a comprehensive assessment of immune responses to IRV in mice with an adjuvant-free dissolving polymer MN patch or by alum-adjuvanted IM injection. We demonstrated that IRV induced the expression of the gut homing receptor LPAM-1 on T and B cells in spleen and mLN of vaccinated mice...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330471/slc26a3-dra-prevents-tnf-alpha-induced-barrier-dysfunction-and-dextran-sulfate-sodium-induced-acute-colitis
#15
Xiangming Ding, Dongxiao Li, Mengke Li, Han Wang, Qin He, Yunwu Wang, Hongbing Yu, Dean Tian, Qin Yu
SLC26A3 encodes a Cl-/HCO3- ion transporter that is also known as downregulated in adenoma (DRA) and is involved in HCO3-/mucus formation. The role of DRA in the epithelial barrier has not been previously established. In this study, we investigated the in vivo and in vitro mechanisms of DRA in the colon epithelial barrier. Immunofluorescence (IF) and co-immunoprecipitation (co-IP) studies reveal that DRA binds directly to tight junction (TJ) proteins and affects the expression of TJ proteins in polarized Caco-2BBe cells...
January 12, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29330461/comparing-olive-oil-and-c4-dietary-oil-a-prodrug-for-the-gpr119-agonist-2-oleoyl-glycerol-less-energy-intake-of-the-latter-is-needed-to-stimulate-incretin-hormone-secretion-in-overweight-subjects-with-type-2-diabetes
#16
Mette Johannsen Mandøe, Katrine Bagge Hansen, Johanne Agerlin Windeløv, Filip Krag Knop, Jens Frederik Rehfeld, Mette Marie Rosenkilde, Jens Juul Holst, Harald Severin Hansen
BACKGROUND/OBJECTIVE: After digestion, dietary triacylglycerol stimulates incretin release in humans, mainly through generation of 2-monoacylglycerol, an agonist for the intestinal G protein-coupled receptor 119 (GPR119). Enhanced incretin release may have beneficial metabolic effects. However, dietary fat may promote weight gain and should therefore be restricted in obesity. We designed C4-dietary oil (1,3-di-butyryl-2-oleoyl glycerol) as a 2-oleoyl glycerol (2-OG)-generating fat type, which would stimulate incretin release to the same extent while providing less calories than equimolar amounts of common triglycerides, e...
January 12, 2018: Nutrition & Diabetes
https://www.readbyqxmd.com/read/29330443/an-insight-into-intestinal-mucosal-microbiota-disruption-after-stroke
#17
Dragana Stanley, Robert J Moore, Connie H Y Wong
Recent work from our laboratory has provided evidence that indicates selective bacterial translocation from the host gut microbiota to peripheral tissues (i.e. lung) plays a key role in the development of post-stroke infections. Despite this, it is currently unknown whether mucosal bacteria that live on and interact closely with the host intestinal epithelium contribute in regulating bacterial translocation after stroke. Here, we found that the microbial communities within the mucosa of gastrointestinal tract (GIT) were significantly different between sham-operated and post-stroke mice at 24 h following surgery...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330433/effect-of-atorvastatin-on-the-gut-microbiota-of-high-fat-diet-induced-hypercholesterolemic-rats
#18
Tariq Jamal Khan, Youssri M Ahmed, Mazin A Zamzami, Saleh A Mohamed, Imran Khan, Othman A S Baothman, Mohamed G Mehanna, Muhammad Yasir
The aim of the present study was to investigate alterations in gut microbiota associated with hypercholesterolemia and treatment with atorvastatin, a commonly prescribed cholesterol-lowering drug. In this study, seven experimental groups of rats were developed based on diets [high-fat diet (HFD) and normal chow diet (NCD)] and various doses of atorvastatin in HFD and NCD groups. 16S rRNA amplicon sequencing was used to analyze the gut microbiota. Atorvastatin significantly reduced the cholesterol level in treated rats...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330424/metagenomic-and-metabolomic-analyses-unveil-dysbiosis-of-gut-microbiota-in-chronic-heart-failure-patients
#19
Xiao Cui, Lei Ye, Jing Li, Ling Jin, Wenjie Wang, Shuangyue Li, Minghui Bao, Shouling Wu, Lifeng Li, Bin Geng, Xin Zhou, Jian Zhang, Jun Cai
Previous studies suggested a possible gut microbiota dysbiosis in chronic heart failure (CHF). However, direct evidence was lacking. In this study, we investigated the composition and metabolic patterns of gut microbiota in CHF patients to provide direct evidence and comprehensive understanding of gut microbiota dysbiosis in CHF. We enrolled 53 CHF patients and 41 controls. Metagenomic analyses of faecal samples and metabolomic analyses of faecal and plasma samples were then performed. We found that the composition of gut microbiota in CHF was significantly different from controls...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330189/targeted-synthesis-and-characterization-of-a-gene-cluster-encoding-nad-p-h-dependent-3%C3%AE-3%C3%AE-and-12%C3%AE-hydroxysteroid-dehydrogenases-from-eggerthella-cag-298-a-gut-metagenomic-sequence
#20
Sean M Mythen, Saravanan Devendran, Celia Méndez-García, Isaac Cann, Jason M Ridlon
Gut metagenomic sequences provide a rich source of microbial genes, the majority of which are annotated by homology or unknown. Genes and gene pathways that encode enzymes catalyzing biotransformation of host bile acids are important to identify in gut metagenomic sequences due to the importance of bile acids on gut microbiome structure and host physiology. Hydroxysteroid dehydrogenases (HSDH) are pyridine nucleotide-dependent enzymes with stereo-specificity and regio-specificity for bile acid and steroid hydroxyl groups...
January 12, 2018: Applied and Environmental Microbiology
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