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Microbiota and IBD

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https://www.readbyqxmd.com/read/27912750/fermented-barley-and-soybean-bs-mixture-enhances-intestinal-barrier-function-in-dextran-sulfate-sodium-dss-induced-colitis-mouse-model
#1
Jong Kyu Woo, Seungho Choi, Ju-Hee Kang, Dae Eung Kim, Byung-Serk Hurh, Jong-Eun Jeon, Sun Yeou Kim, Seung Hyun Oh
BACKGROUND: Inflammatory bowel disease (IBD) is characterized by chronic or relapsing immune system activation and inflammation within the gastrointestinal tract. The lack of safety and efficacy of standard therapies, the use of food supplements for managing IBD is increasing, and many studies have reported that various food supplements provide many beneficial effects for the IBD. METHODS: This study aimed to evaluate the anti-colitis effects of dietary supplementation with a fermented barley and soybean mixture (BS) on intestinal inflammation using a murine model of IBD...
December 3, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27891639/consensus-report-faecal-microbiota-transfer-clinical-applications-and-procedures
#2
REVIEW
J König, A Siebenhaar, C Högenauer, P Arkkila, M Nieuwdorp, T Norén, C Y Ponsioen, U Rosien, N G Rossen, R Satokari, A Stallmach, W de Vos, J Keller, R J Brummer
BACKGROUND: Faecal microbiota transplantation or transfer (FMT) aims at replacing or reinforcing the gut microbiota of a patient with the microbiota from a healthy donor. Not many controlled or randomised studies have been published evaluating the use of FMT for other diseases than Clostridium difficile infection, making it difficult for clinicians to decide on a suitable indication. AIM: To provide an expert consensus on current clinical indications, applications and methodological aspects of FMT...
November 27, 2016: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27886121/sodium-butyrate-reduces-colitogenic-immunoglobulin-a-coated-bacteria-and-modifies-the-composition-of-microbiota-in-il-10-deficient-mice
#3
Tenghui Zhang, Chao Ding, Mingli Zhao, Xujie Dai, Jianbo Yang, Yi Li, Lili Gu, Yao Wei, Jianfeng Gong, Weiming Zhu, Ning Li, Jieshou Li
High levels of immunoglobulin A (IgA)-coated bacteria may have a role in driving inflammatory bowel disease (IBD). We therefore investigated the effect of sodium butyrate on microbiota in IBD prone interleukin (IL)-10(-/-) mice. At 8 weeks of age, mice were allocated into three groups (n = 4/group): normal (C57BL/6), IL-10(-/-), and IL-10(-/-) treated with sodium butyrate (100 mM). Severity of colitis, inflammatory cytokine and short-chain fatty acid (SCFA) concentration in proximal colon contents, the percentage of IgA-coated bacteria and microbiota composition by 16S ribosomal RNA assessment of stool were measured after 4 weeks of treatment...
November 24, 2016: Nutrients
https://www.readbyqxmd.com/read/27884149/sasa-quelpaertensis-leaf-extract-regulates-microbial-dysbiosis-by-modulating-the-composition-and-diversity-of-the-microbiota-in-dextran-sulfate-sodium-induced-colitis-mice
#4
Yiseul Yeom, Bong-Soo Kim, Se-Jae Kim, Yuri Kim
BACKGROUND: Inflammatory bowel diseases (IBD) are related to a dysfunction of the mucosal immune system and they result from complex interactions between genetics and environmental factors, including lifestyle, diet, and the gut microbiome. Therefore, the effect of Sasa quelpaertensis leaf extract (SQE) on gut microbiota in a dextran sulfate sodium (DSS)-induced colitis mouse model was investigated with pyrosequencing of fecal samples. METHODS: Three groups of animals were examined: i) a control group, ii) a group that was received 2...
November 25, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27879485/patients-views-on-fecal-microbiota-transplantation-an-acceptable-therapeutic-option-in-inflammatory-bowel-disease
#5
Jonas Zeitz, Marina Bissig, Christiane Barthel, Luc Biedermann, Sylvie Scharl, Daniel Pohl, Pascal Frei, Stephan R Vavricka, Michael Fried, Gerhard Rogler, Michael Scharl
BACKGROUND: Fecal microbiota transplantation (FMT) represents a new therapeutic option that has been studied in two randomized-controlled trials in ulcerative colitis patients. Our study aimed to identify patients' views on the use of this novel therapeutic approach. METHODS: Using an anonymous questionnaire, we obtained data from 574 inflammatory bowel disease (IBD) patients on their knowledge and willingness to undergo FMT. RESULTS: A large proportion of IBD patients (53...
November 22, 2016: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27874308/microbial-metabolomic-and-immunologic-dynamics-in-a-relapsing-genetic-mouse-model-of-colitis-induced-by-t-synthase-deficiency
#6
Jonathan P Jacobs, Lin Lin, Maryam Goudarzi, Paul Ruegger, Dermot P B McGovern, Albert J Fornace, James Borneman, Lijun Xia, Jonathan Braun
Intestinal dysbiosis is thought to confer susceptibility to inflammatory bowel disease (IBD), but it is unknown whether dynamic changes in the microbiome contribute to fluctuations in disease activity. We explored this question using mice with intestine-specific deletion of C1galt1 (also known as T-synthase) (Tsyn mice). These mice develop spontaneous microbiota-dependent colitis with a remitting/relapsing course due to loss of mucin core-1 derived O-glycans. 16S rRNA sequencing and untargeted metabolomics demonstrated age-specific perturbations in the intestinal microbiome and metabolome of Tsyn mice compare with littermate controls at weeks 3 (disease onset), 5 (during remission), and 9 (after relapse)...
November 22, 2016: Gut Microbes
https://www.readbyqxmd.com/read/27869188/structural-and-immunomodulatory-differences-among-lactobacilli-exopolysaccharides-isolated-from-intestines-of-mice-with-experimentally-induced-inflammatory-bowel-disease
#7
Sabina Górska, Corine Sandstrőm, Justyna Wojas-Turek, Joanna Rossowska, Elżbieta Pajtasz-Piasecka, Ewa Brzozowska, Andrzej Gamian
Characteristic changes in the microbiota biostructure and a decreased tolerance to intestinal bacteria have been associated with inflammatory bowel disease (IBD). However, few studies have examined the constituents of the intestinal microbiota, including the surface molecules of the bacteria, in healthy and IBD subsets. Here, we compare the chemical structures and immunomodulatory properties of the exopolysaccharides (EPS) of lactobacilli isolated from mice with induced IBD (IBD "+") versus those of healthy mice (IBD "-")...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27853192/doxycycline-metronidazole-and-isotretinoin-do-they-modify-microrna-mrna-expression-profiles-and-function-in-murine-t-cells
#8
Eugenia Becker, Susan Bengs, Sirisha Aluri, Lennart Opitz, Kirstin Atrott, Claudia Stanzel, Pedro A Ruiz Castro, Gerhard Rogler, Isabelle Frey-Wagner
Inflammatory bowel disease (IBD) may develop due to an inflammatory response to commensal gut microbiota triggered by environmental factors in a genetically susceptible host. Isotretinoin (acne therapy) has been inconsistently associated with IBD onset and flares but prior treatment with antibiotics, also associated with IBD development, complicates the confirmation of this association. Here we studied in mice whether doxycycline, metronidazole or isotretinoin induce epigenetic modifications, and consequently change T-cell mRNA expression and/or function directly after treatment and after a 4 week recovery period...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27834858/impact-of-microbes-on-the-pathogenesis-of-primary-biliary-cirrhosis-pbc-and-primary-sclerosing-cholangitis-psc
#9
REVIEW
Jochen Mattner
Primary biliary cirrhosis (PBC) and primary sclerosing cholangitis (PSC) represent the major clinical entities of chronic cholestatic liver diseases. Both disorders are characterized by portal inflammation and slowly progress to obliterative fibrosis and eventually liver cirrhosis. Although immune-pathogenic mechanisms have been implicated in the pathogenesis of PBC and PSC, neither disorder is considered to be a classical autoimmune disease, as PSC and PBC patients do not respond to immune-suppressants. Furthermore, the decreased bile flow resulting from the immune-mediated tissue assault and the subsequent accumulation of toxic bile products in PBC and PSC not only perpetuates biliary epithelial damage, but also alters the composition of the intestinal and biliary microbiota and its mutual interactions with the host...
November 9, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27833600/mucosal-prevalence-and-interactions-with-the-epithelium-indicate-commensalism-of-sutterella-spp
#10
Kaisa Hiippala, Veera Kainulainen, Marko Kalliomäki, Perttu Arkkila, Reetta Satokari
Sutterella species have been frequently associated with human diseases, such as autism, Down syndrome, and inflammatory bowel disease (IBD), but the impact of these bacteria on health still remains unclear. Especially the interactions of Sutterella spp. with the host are largely unknown, despite of the species being highly prevalent. In this study, we addressed the interaction of three known species of Sutterella with the intestinal epithelium and examined their adhesion properties, the effect on intestinal barrier function and the pro-inflammatory capacity in vitro...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27827438/changes-in-duodenal-tissue-associated-microbiota-following-hookworm-infection-and-consecutive-gluten-challenges-in-humans-with-coeliac-disease
#11
Paul Giacomin, Martha Zakrzewski, Timothy P Jenkins, Xiaopei Su, Rafid Al-Hallaf, John Croese, Stefan de Vries, Andrew Grant, Makedonka Mitreva, Alex Loukas, Lutz Krause, Cinzia Cantacessi
A reduced diversity of the gastrointestinal commensal microbiota is associated with the development of several inflammatory diseases. Recent reports in humans and animal models have demonstrated the beneficial therapeutic effects of infections by parasitic worms (helminths) in some inflammatory disorders, such as inflammatory bowel disease (IBD) and coeliac disease (CeD). Interestingly, these studies have described how helminths may alter the intestinal microbiota, potentially representing a mechanism by which they regulate inflammation...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27824648/fecal-microbiota-and-metabolome-in-a-mouse-model-of-spontaneous-chronic-colitis-relevance-to-human-inflammatory-bowel-disease
#12
Ainsley M Robinson, Shakuntla V Gondalia, Avinash V Karpe, Rajaraman Eri, David J Beale, Paul D Morrison, Enzo A Palombo, Kulmira Nurgali
BACKGROUND: Dysbiosis of the gut microbiota may be involved in the pathogenesis of inflammatory bowel disease (IBD). However, the mechanisms underlying the role of the intestinal microbiome and metabolome in IBD onset and its alteration during active treatment and recovery remain unknown. Animal models of chronic intestinal inflammation with similar microbial and metabolomic profiles would enable investigation of these mechanisms and development of more effective treatments. Recently, the Winnie mouse model of colitis closely representing the clinical symptoms and characteristics of human IBD has been developed...
November 7, 2016: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/27821485/dietary-emulsifier-induced-low-grade-inflammation-promotes-colon-carcinogenesis
#13
Emilie Viennois, Didier Merlin, Andrew T Gewirtz, Benoit Chassaing
The increased risks conferred by inflammatory bowel disease (IBD) to the development of colorectal cancer (CRC) gave rise to the term "colitis-associated cancer" and the concept that inflammation promotes colon tumorigenesis. A condition more common than IBD is low-grade inflammation, which correlates with altered gut microbiota composition and metabolic syndrome, both present in many cases of CRC. Recent findings suggest that low-grade inflammation in the intestine is promoted by consumption of dietary emulsifiers, a ubiquitous component of processed foods which alter the composition of gut microbiota...
November 7, 2016: Cancer Research
https://www.readbyqxmd.com/read/27821031/does-helicobacter-pylori-eradication-therapy-trigger-or-protect-against-crohn-s-disease
#14
REVIEW
H As Murad
Helicobacter pylori (H. pylori) infection is involved in multiple gastrointestinal and extra-gastrointestinal disorders. This review focuses on possible link between H. pylori eradication and Crohn's disease (CD) which is a chronic inflammatory bowel disease (IBD). Fecal calprotectin and; to lesser extent; fecal lactoferrin are sensitive and specific markers for monitoring CD activity. Data about link between H. pylori eradication and CD are limited and inconclusive. The infection likely shifts equilibrium between T helper 1 (Th1) and Th2 immune responses to the Th2 pattern...
July 2016: Acta Gastro-enterologica Belgica
https://www.readbyqxmd.com/read/27811291/fungal-microbiota-profile-in-newly-diagnosed-treatment-na%C3%A3-ve-children-with-crohn-disease
#15
Mohammad El Mouzan, Feng Wang, Mohammad Al Mofarreh, Rajita Menon, Ahmad Al Barrag, Kirill S Korolev, Ahmad Al Sarkhy, Mona Al Asmi, Yassin Hamed, Anjum Saeed, Scot Dowd, Asaad Assiri, Harland Winter
BACKGROUND & AIMS: although increasing evidence suggests a role for fungi in inflammatory bowel disease (IBD), data are scarce and mostly from adults. Our aim was to define the characteristics of fungal microbiota in newly-diagnosed treatment-naïve children with Crohn disease (CD). METHODS: The children referred for colonoscopy were prospectively enrolled in the study at King Khalid University Hospital, King Saud University and Al Mofarreh Polyclinics in Riyadh...
November 3, 2016: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/27802156/recent-advances-in-clinical-practice-a-systematic-review-of-isolated-colonic-crohn-s-disease-the-third-ibd
#16
REVIEW
Sreedhar Subramanian, Anders Ekbom, Jonathan M Rhodes
The genetics of isolated colonic Crohn's disease place it approximately midway between Crohn's disease with small intestinal involvement and UC, making a case for considering it as a separate condition. We have therefore systematically reviewed its epidemiology, pathophysiology and treatment. Key findings include a higher incidence in females (65%) and older average age at presentation than Crohn's disease at other sites, a mucosa-associated microbiota between that found in ileal Crohn's disease and UC, no response to mesalazine, but possibly better response to antitumour necrosis factor than Crohn's disease at other sites...
October 6, 2016: Gut
https://www.readbyqxmd.com/read/27802154/interplay-of-host-genetics-and-gut-microbiota-underlying-the-onset-and-clinical-presentation-of-inflammatory-bowel-disease
#17
Floris Imhann, Arnau Vich Vila, Marc Jan Bonder, Jingyuan Fu, Dirk Gevers, Marijn C Visschedijk, Lieke M Spekhorst, Rudi Alberts, Lude Franke, Hendrik M van Dullemen, Rinze W F Ter Steege, Curtis Huttenhower, Gerard Dijkstra, Ramnik J Xavier, Eleonora A M Festen, Cisca Wijmenga, Alexandra Zhernakova, Rinse K Weersma
OBJECTIVE: Patients with IBD display substantial heterogeneity in clinical characteristics. We hypothesise that individual differences in the complex interaction of the host genome and the gut microbiota can explain the onset and the heterogeneous presentation of IBD. Therefore, we performed a case-control analysis of the gut microbiota, the host genome and the clinical phenotypes of IBD. DESIGN: Stool samples, peripheral blood and extensive phenotype data were collected from 313 patients with IBD and 582 truly healthy controls, selected from a population cohort...
October 8, 2016: Gut
https://www.readbyqxmd.com/read/27795980/functional-characterization-of-inflammatory-bowel-disease-associated-gut-dysbiosis-in-gnotobiotic-mice
#18
Hiroko Nagao-Kitamoto, Andrew B Shreiner, Merritt G Gillilland, Sho Kitamoto, Chiharu Ishii, Akiyoshi Hirayama, Peter Kuffa, Mohamad El-Zaatari, Helmut Grasberger, Anna M Seekatz, Peter D R Higgins, Vincent B Young, Shinji Fukuda, John Y Kao, Nobuhiko Kamada
BACKGROUND & AIMS: Gut dysbiosis is closely involved in the pathogenesis of inflammatory bowel disease (IBD). However, it remains unclear whether IBD-associated gut dysbiosis contributes to disease pathogenesis or is merely secondary to intestinal inflammation. We established a humanized gnotobiotic (hGB) mouse system to assess the functional role of gut dysbiosis associated with 2 types of IBD: Crohn's disease (CD) and ulcerative colitis (UC). METHODS: Germ-free mice were colonized by the gut microbiota isolated from patients with CD and UC, and healthy controls...
July 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27775675/why-are-omics-technologies-important-to-understanding-the-role-of-nutrition-in-inflammatory-bowel-diseases
#19
Lynnette R Ferguson, Matthew P G Barnett
For many years, there has been confusion about the role that nutrition plays in inflammatory bowel diseases (IBD). It is apparent that good dietary advice for one individual may prove inappropriate for another. As with many diseases, genome-wide association studies across large collaborative groups have been important in revealing the role of genetics in IBD, with more than 200 genes associated with susceptibility to the disease. These associations provide clues to explain the differences in nutrient requirements among individuals...
October 21, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27775548/il-33-regulates-the-iga-microbiota-axis-to-restrain-il-1%C3%AE-dependent-colitis-and-tumorigenesis
#20
Ankit Malik, Deepika Sharma, Qifan Zhu, Rajendra Karki, Clifford S Guy, Peter Vogel, Thirumala-Devi Kanneganti
Inflammatory bowel diseases (IBD) affect over 5 million individuals in the industrialized world, with an increasing incidence rate worldwide. IBD also predisposes affected individuals to development of colorectal cancer, which is a leading cause of cancer-related deaths in adults. Mutations in genes encoding molecules in the IL-33 signaling pathway are associated with colitis and colitis-associated cancer (CAC), but how IL-33 modulates gut homeostasis is unclear. Here, we have shown that Il33-deficient mice are highly susceptible to colitis and CAC...
December 1, 2016: Journal of Clinical Investigation
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