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Microbiota and IBD

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https://www.readbyqxmd.com/read/28330889/robust-microbiota-based-diagnostics-for-inflammatory-bowel-disease
#1
A Eck, E F J de Groot, T G J de Meij, M Welling, P H M Savelkoul, A E Budding
Strong evidence suggests that gut microbiota is altered in inflammatory bowel disease (IBD), indicating its potential role in non-invasive diagnostics. However, no clinical applications are currently used for routine patient care. The main obstacle to implementing a gut microbiota test for IBD is the lack of standardization, which leads to high inter-laboratory variations. We studied the between-hospital and between-platform batch effects and their effect on predictive accuracy for IBD.Fecal samples from 91 pediatric IBD patients and 58 healthy children were collected...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28325746/dietary-emulsifiers-directly-alter-human-microbiota-composition-and-gene-expression-ex-vivo-potentiating-intestinal-inflammation
#2
Benoit Chassaing, Tom Van de Wiele, Jana De Bodt, Massimo Marzorati, Andrew T Gewirtz
OBJECTIVE: The intestinal microbiota plays a central role in the development of many chronic inflammatory diseases including IBD and metabolic syndrome. Administration of substances that alter microbiota composition, including the synthetic dietary emulsifiers polysorbate 80 (P80) and carboxymethylcellulose (CMC), can promote such inflammatory disorders. However, that inflammation itself impacts microbiota composition has obfuscated defining the extent to which these compounds or other substances act directly upon the microbiota versus acting on host parameters that promote inflammation, which subsequently reshapes the microbiota...
March 21, 2017: Gut
https://www.readbyqxmd.com/read/28321153/p-glycoprotein-multidrug-transporter-in-inflammatory-bowel-diseases-more-questions-than-answers
#3
EDITORIAL
Elke Cario
The gastrointestinal barrier is constantly exposed to numerous environmental substrates that are foreign and potentially harmful. These xenobiotics can cause shifts in the intestinal microbiota composition, affect mucosal immune responses, disturb tissue integrity and impair regeneration. The multidrug transporter ABCB1/MDR1 p-glycoprotein (p-gp) plays a key role at the front line of host defence by efficiently protecting the gastrointestinal barrier from xenobiotic accumulation. This Editorial discusses how altered expression and function of ABCB1/MDR1 p-gp may contribute to the development and persistence of chronic intestinal inflammation in inflammatory bowel diseases (IBD)...
March 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28320072/constitutive-androstane-receptor-regulates-the-intestinal-mucosal-response-to-injury
#4
Grace M Hudson, Kyle L Flannigan, Sarah L Erickson, Fernando A Vicentini, Alexandra Zamponi, Christina L Hirota, Laurie Alston, Christophe Altier, Subrata Ghosh, Kevin P Rioux, Sridhar Mani, Thomas K Chang, Simon A Hirota
BACKGROUND AND PURPOSE: The pathogenesis of the inflammatory bowel diseases(IBD), composed of Crohn's disease(CD) and ulcerative colitis(UC), involves aberrant interactions between a genetically susceptible individual, their microbiota and environmental factors. Alterations in xenobiotic receptor expression and function are associated with increased risk for IBD. In the current study, we assessed the role of the constitutive androstane receptor(CAR), a xenobiotic receptor closely related to the pregnane X receptor, in the regulation of intestinal mucosal homeostasis...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28315032/novel-indications-for-fecal-microbial-transplantation-update-and-review-of-the-literature
#5
REVIEW
Nathaniel Aviv Cohen, Nitsan Maharshak
BACKGROUND AND AIMS: Fecal microbial transplantation (FMT) is an established successful treatment modality for recurrent Clostridium difficile infection (CDI). The safety profile and potential therapeutic advantages of FMT for diseases associated with dysbiosis and immune dysfunction have led to many publications, mainly case series, and while many studies and reviews have been published on the use of FMT for inflammatory bowel disease (IBD), its potential use for other disease conditions has not been thoroughly reviewed...
March 17, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28293937/gut-microbiota-and-inflammatory-bowel-disease-an-update
#6
Grainne Holleran, Loris R Lopetuso, Gianluca Ianiro, Silvia Pecere, Marco Pizzoferrato, Valentina Petito, Cristina Graziani, Deirdre Mc Namara, Antonio Gasbarrini, Franco Scaldaferri
Major advances have occurred in the knowledge of the pathogenesis of Inflammatory Bowel Disease (IBD) over the last decade, and perhaps the most major, and clinically advantageous of these advances has been the discovery of the microbiome as a key multifaceted component of inflammation. The Gut microbiome is the largest known group of cells in the body, and is now recognised as an organ in its own right. Initial studies looking at a possible role of bacterial manipulation of the immune system in IBD, looked at identifying a specific bacterial species, and were not representative of a feasible model of inflammation in IBD overall...
March 14, 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28293241/a-potential-role-of-salmonella-infection-in-the-onset-of-inflammatory-bowel-diseases
#7
REVIEW
Bárbara M Schultz, Carolina A Paduro, Geraldyne A Salazar, Francisco J Salazar-Echegarai, Valentina P Sebastián, Claudia A Riedel, Alexis M Kalergis, Manuel Alvarez-Lobos, Susan M Bueno
Inflammatory bowel disease (IBD) includes a set of pathologies that result from a deregulated immune response that may affect any portion of the gastrointestinal tract. The most prevalent and defined forms of IBD are Crohn's disease and ulcerative colitis. Although the etiology of IBD is not well defined, it has been suggested that environmental and genetic factors contribute to disease development and that the interaction between these two factors can trigger the pathology. Diet, medication use, vitamin D status, smoking, and bacterial infections have been proposed to influence or contribute to the onset or development of the disease in susceptible individuals...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28288458/gastric-acid-suppression-is-associated-with-an-increased-risk-of-adverse-outcomes-in-inflammatory-bowel-disease
#8
Rajesh Shah, Peter Richardson, Hong Yu, Jennifer Kramer, Jason Ken Hou
BACKGROUND: The intestinal microbiota may influence inflammatory bowel disease (IBD) activity. Histamine 2 receptor antagonists (H2RAs) and proton pump inhibitors (PPIs) can alter the intestinal microbiota. The aim of this study was to assess the relationship between H2RAs, PPIs, and IBD-related outcomes. METHODS: We conducted a case-control study of IBD patients using the Veterans Health Affairs databases. Cases were defined by their first instance of an IBD-related hospitalization or surgery and the exposure of interest was H2RA or PPI use 30 days prior to the outcome...
March 14, 2017: Digestion
https://www.readbyqxmd.com/read/28286741/sampling-strategies-for-three-dimensional-spatial-community-structures-in-ibd-microbiota-research
#9
REVIEW
Shaocun Zhang, Xiaocang Cao, He Huang
Identifying intestinal microbiota is arguably an important task that is performed to determine the pathogenesis of inflammatory bowel diseases (IBD); thus, it is crucial to collect and analyze intestinally-associated microbiota. Analyzing a single niche to categorize individuals does not enable researchers to comprehensively study the spatial variations of the microbiota. Therefore, characterizing the spatial community structures of the inflammatory bowel disease microbiome is critical for advancing our understanding of the inflammatory landscape of IBD...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28272549/low-dose-penicillin-exposure-in-early-life-decreases-th17-and-the-susceptibility-to-dss-colitis-in-mice-through-gut-microbiota-modification
#10
Shuang Jin, Di Zhao, Chenwen Cai, Dongjuan Song, Jun Shen, Antao Xu, Yuqi Qiao, Zhihua Ran, Qing Zheng
Antibiotic exposure in early life can lead to a significant change of the gut microbiota and may contribute to later onset of inflammatory bowel disease (IBD). However, the relationship between early-life antibiotic treatment and IBD is ambiguous, according to contradicting results of epidemiologic studies. In the present study, we demonstrated that low-dose penicillin pre-treatment had a unique protective effect against mouse colitis induced by dextran sodium sulfate (DSS). Low-dose penicillin also suppressed the expression of pro-inflammatory cytokine IL-17 in various intestinal tissues, and decreased the amount of Th17 cells in small-intestine lamina propria...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28272447/eggshell-membrane-powder-ameliorates-intestinal-inflammation-by-facilitating-the-restitution-of-epithelial-injury-and-alleviating-microbial-dysbiosis
#11
Huijuan Jia, Manaka Hanate, Wanping Aw, Hideomi Itoh, Kenji Saito, Shoko Kobayashi, Satoshi Hachimura, Shinji Fukuda, Masaru Tomita, Yukio Hasebe, Hisanori Kato
Gut microbiota is an essential factor in the shaping of intestinal immune system development and driving inflammation in inflammatory bowel disease (IBD). We report the effects and microbe-host interactions underlying an intervention using fine powder of eggshell membrane (ESM) against IBD. ESM attenuated lipopolysaccharide-induced inflammatory cytokine production and promoted the Caco-2 cell proliferation by up-regulating growth factors in vitro. In a murine model of dextran sodium sulphate-induced colitis, ESM significantly suppressed the disease activity index and colon shortening...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28270247/gut-brain-actions-underlying-comorbid-anxiety-and-depression-associated-with-inflammatory-bowel-disease
#12
Áine Abautret-Daly, Elaine Dempsey, Adolfo Parra-Blanco, Carlos Medina, Andrew Harkin
Introduction Inflammatory bowel disease (IBD) is a chronic relapsing and remitting disorder characterised by inflammation of the gastrointestinal tract. There is a growing consensus that IBD is associated with anxiety- and depression-related symptoms. Psychological symptoms appear to be more prevalent during active disease states with no difference in prevalence between Crohn's disease and ulcerative colitis. Behavioural disturbances including anxiety- and depression-like symptoms have also been observed in animal models of IBD...
March 8, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28267044/mutations-in-interleukin-10-receptor-and-clinical-phenotypes-in-patients-with-very-early-onset-inflammatory-bowel-disease-a-chinese-veo-ibd-collaboration-group-survey
#13
Zhiheng Huang, Kaiyue Peng, Xiaoqin Li, Ruiqin Zhao, Jieyu You, Xiuyong Cheng, Zhaoxia Wang, Ying Wang, Bingbing Wu, Huijun Wang, Huasong Zeng, Zhuowen Yu, Cuifang Zheng, Yuesheng Wang, Ying Huang
BACKGROUND: Interleukin-10 (IL10) signaling plays an important role in the pathogenesis of very early onset inflammatory bowel disease (VEO-IBD) in children. However, little is known about the role of the IL10 axis in children with VEO-IBD in China. METHODS: The Chinese VEO-IBD Collaboration Group was created to collect clinical and genetic data from patients deficient in IL10 and the IL10 receptor. High-throughput sequencing was performed to identify mutations in these genes...
April 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28261015/host-microbial-cross-talk-in-inflammatory-bowel-disease
#14
REVIEW
Hiroko Nagao-Kitamoto, Nobuhiko Kamada
A vast community of commensal microorganisms, commonly referred to as the gut microbiota, colonizes the gastrointestinal tract (GI). The involvement of the gut microbiota in the maintenance of the gut ecosystem is two-fold: it educates host immune cells and protects the host from pathogens. However, when healthy microbial composition and function are disrupted (dysbiosis), the dysbiotic gut microbiota can trigger the initiation and development of various GI diseases, including inflammatory bowel disease (IBD)...
February 2017: Immune Network
https://www.readbyqxmd.com/read/28250469/gut-microbiota-diagnosing-ibd-with-the-gut-microbiome
#15
Iain Dickson
No abstract text is available yet for this article.
March 1, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28249284/disease-associated-changes-in-bile-acid-profiles-and-links-to-altered-gut-microbiota
#16
Susan A Joyce, Cormac G M Gahan
The gastrointestinal microbiota plays a central role in the host metabolism of bile acids through deconjugation and dehydroxylation reactions, which generate unconjugated free bile acids and secondary bile acids respectively. These microbially generated bile acids are particularly potent signalling molecules that interact with host bile acid receptors (including the farnesoid X receptor, vitamin D receptor and TGR5 receptor) to trigger cellular responses that play essential roles in host lipid metabolism, electrolyte transport and immune regulation...
2017: Digestive Diseases
https://www.readbyqxmd.com/read/28244679/use-of-the-low-fodmap-diet-in-inflammatory-bowel-disease
#17
REVIEW
Peter R Gibson
Irritable bowel syndrome (IBS)-like symptoms are not uncommon in patients with quiescent inflammatory bowel disease (IBD). While gluten-free diet is applied by patients, there are no reported interventional studies. The low-FODMAP diet, on the other hand, has efficacy similar to that seen in patients with IBS in three unblinded or observational studies of IBD cohorts who had well-controlled inflammatory disease and in one small randomized cross-over study. FODMAP intake by patients with IBD is not elevated, and, in one study, fructan intakes were lower in patients with Crohn's disease than in controls...
March 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28219317/dietary-fiber-gap-and-host-gut-microbiota
#18
Meng Han, Ping Liu, Defa Li, Yuan Li, Xi Ma
Accumulating evidence are dramatically increasing access to the facts that the gut microbiota plays a pivotal role in host metabolism and health, which revealed the possibility of a plethora of associations between gut bacteria and human diseases. Several functional roles carried out by a major class of host's diet, such as fiber. Fiber is the main source of microbiota-accessible carbohydrate in the diet of humans. In modern diet, it is difficult to intake dietary fiber as enough as recommended standard. The low-fiber diet in the modern life, known as fiber gap, can trigger to a substantial depletion of the human gut microbiota diversity and beneficial metabolites...
February 20, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28217370/tryptophan-a-gut-microbiota-derived-metabolites-regulating-inflammation
#19
REVIEW
Lucie Etienne-Mesmin, Benoit Chassaing, Andrew T Gewirtz
Inflammatory bowel diseases (IBD), which comprise Crohn's disease and ulcerative colitis, are chronic intestinal disorders with an increased prevalence and incidence over the last decade in many different regions over the world. The etiology of IBD is still not well defined, but evidence suggest that it results from perturbation of the homeostasis between the intestinal microbiota and the mucosal immune system, with the involvement of both genetic and environmental factors. Genome wide association studies, which involve large-scale genome-wide screening of potential polymorphism, have identified several mutations associated with IBD...
February 6, 2017: World Journal of Gastrointestinal Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28215162/gut-brain-axis-role-of-lipids-in-the-regulation-of-inflammation-pain-and-cns-diseases
#20
Roberto Russo, Claudia Cristiano, Carmen Avagliano, Carmen De Caro, Giovanna La Rana, Giuseppina Mattace Raso, Roberto Berni Canani, Rosaria Meli, Antonio Calignano
The human gut is a composite anaerobic environment with a large, diverse and dynamic enteric microbiota, represented by more than 100 trillion microorganisms, including at least 1000 distinct species. The discovery that a different microbial composition can influence behavior and cognition, and in turn the nervous system can indirectly influence enteric microbiota composition, has significantly contributed to establish the well-accepted concept of gut-brain axis. This hypothesis is supported by several evidence showing mutual mechanisms, which involve the vague nerve, the immune system, the hypothalamic-pituitary-adrenal (HPA) axis modulation and the bacteria-derived metabolites...
February 16, 2017: Current Medicinal Chemistry
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