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Gut

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https://www.readbyqxmd.com/read/28228489/age-dependent-shift-in-macrophage-polarisation-causes-inflammation-mediated-degeneration-of-enteric-nervous-system
#1
Laren Becker, Linh Nguyen, Jaspreet Gill, Subhash Kulkarni, Pankaj Jay Pasricha, Aida Habtezion
OBJECTIVE: The enteric nervous system (ENS) undergoes neuronal loss and degenerative changes with age. The cause of this neurodegeneration is poorly understood. Muscularis macrophages residing in close proximity to enteric ganglia maintain neuromuscular function via direct crosstalk with enteric neurons and have been implicated in the pathogenesis of GI motility disorders like gastroparesis and postoperative ileus. The aim of this study was to assess whether ageing causes alterations in macrophage phenotype that contributes to age-related degeneration of the ENS...
February 21, 2017: Gut
https://www.readbyqxmd.com/read/28228488/uk-guideline-on-transition-of-adolescent-and-young-persons-with-chronic-digestive-diseases-from-paediatric-to-adult-care
#2
Alenka J Brooks, Philip J Smith, Richard Cohen, Paul Collins, Andrew Douds, Valda Forbes, Daniel R Gaya, Brian T Johnston, Patrick J McKiernan, Charles D Murray, Shaji Sebastian, Monica Smith, Lisa Whitley, Lesley Williams, Richard K Russell, Sara A McCartney, James O Lindsay
The risks of poor transition include delayed and inappropriate transfer that can result in disengagement with healthcare. Structured transition care can improve control of chronic digestive diseases and long-term health-related outcomes. These are the first nationally developed guidelines on the transition of adolescent and young persons (AYP) with chronic digestive diseases from paediatric to adult care. They were commissioned by the Clinical Services and Standards Committee of the British Society of Gastroenterology under the auspices of the Adolescent and Young Persons (A&YP) Section...
February 21, 2017: Gut
https://www.readbyqxmd.com/read/28219893/toxin-positive-clostridium-difficile-latently-infect-mouse-colonies-and-protect-against-highly-pathogenic-c-difficile
#3
Lucie Etienne-Mesmin, Benoit Chassaing, Oluwaseyi Adekunle, Lisa M Mattei, Frederic D Bushman, Andrew T Gewirtz
OBJECTIVE: Clostridium difficile is a toxin-producing bacterium and a leading cause of antibiotic-associated disease. The ability of C. difficile to form spores and infect antibiotic-treated persons at low multiplicity of infection (MOI) underlies its large disease burden. However, C. difficile-induced disease might also result from long-harboured C. difficile that blooms in individuals administered antibiotics. DESIGN: Mice purchased from multiple vendors and repeatedly testing negative for this pathogen by quantitative PCR bloomed C...
February 20, 2017: Gut
https://www.readbyqxmd.com/read/28213610/prebiotic-inulin-type-fructans-induce-specific-changes-in-the-human-gut-microbiota
#4
Doris Vandeputte, Gwen Falony, Sara Vieira-Silva, Jun Wang, Manuela Sailer, Stephan Theis, Kristin Verbeke, Jeroen Raes
OBJECTIVE: Contrary to the long-standing prerequisite of inducing selective (ie, bifidogenic) effects, recent findings suggest that prebiotic interventions lead to ecosystem-wide microbiota shifts. Yet, a comprehensive characterisation of this process is still lacking. Here, we apply 16S rDNA microbiota profiling and matching (gas chromatography mass spectrometry) metabolomics to assess the consequences of inulin fermentation both on the composition of the colon bacterial ecosystem and faecal metabolites profiles...
February 17, 2017: Gut
https://www.readbyqxmd.com/read/28213609/gut-microbial-profile-is-altered-in-primary-biliary-cholangitis-and-partially-restored-after-udca-therapy
#5
Ruqi Tang, Yiran Wei, Yanmei Li, Weihua Chen, Haoyan Chen, Qixia Wang, Fan Yang, Qi Miao, Xiao Xiao, Haiyan Zhang, Min Lian, Xiang Jiang, Jun Zhang, Qin Cao, Zhuping Fan, Maoying Wu, Dekai Qiu, Jing-Yuan Fang, Aftab Ansari, M Eric Gershwin, Xiong Ma
OBJECTIVE: A close relationship between gut microbiota and some chronic liver disorders has recently been described. Herein, we systematically performed a comparative analysis of the gut microbiome in primary biliary cholangitis (PBC) and healthy controls. DESIGN: We first conducted a cross-sectional study of 60 ursodeoxycholic acid (UDCA) treatment-naïve patients with PBC and 80 matched healthy controls. Second, an independent cohort composed of 19 treatment-naïve patients and 34 controls was used to validate the results...
February 17, 2017: Gut
https://www.readbyqxmd.com/read/28209624/tofacitinib-for-induction-and-maintenance-therapy-of-crohn-s-disease-results-of-two-phase-iib-randomised-placebo-controlled-trials
#6
Julian Panés, William J Sandborn, Stefan Schreiber, Bruce E Sands, Séverine Vermeire, Geert D'Haens, Remo Panaccione, Peter D R Higgins, Jean-Frederic Colombel, Brian G Feagan, Gary Chan, Michele Moscariello, Wenjin Wang, Wojciech Niezychowski, Amy Marren, Paul Healey, Eric Maller
OBJECTIVE: Tofacitinib is an oral, small-molecule Janus kinase inhibitor that is being investigated for IBD. We evaluated the efficacy and safety of tofacitinib for induction and maintenance treatment in patients with moderate-to-severe Crohn's disease (CD). DESIGN: We conducted two randomised, double-blind, placebo-controlled, multicentre phase IIb studies. Adult patients with moderate-to-severe CD were randomised to receive induction treatment with placebo, tofacitinib 5 or 10 mg twice daily for 8 weeks...
February 16, 2017: Gut
https://www.readbyqxmd.com/read/28188172/t-cell-repertoires-in-refractory-coeliac-disease
#7
Julia Ritter, Karin Zimmermann, Korinna Jöhrens, Stefanie Mende, Anke Seegebarth, Britta Siegmund, Steffen Hennig, Kremena Todorova, Andreas Rosenwald, Severin Daum, Michael Hummel, Michael Schumann
OBJECTIVE: Refractory coeliac disease (RCD) is a potentially hazardous complication of coeliac disease (CD). In contrast to RCD type I, RCD type II is a precursor entity of enteropathy-associated T-cell lymphoma (EATL), which is associated with clonally expanding T-cells that are also found in the sequentially developing EATL. Using high-throughput sequencing (HTS), we aimed to establish the small-intestinal T-cell repertoire (TCR) in CD and RCD to unravel the role of distinct T-cell clonotypes in RCD pathogenesis...
February 10, 2017: Gut
https://www.readbyqxmd.com/read/28183795/med12-is-recurrently-mutated-in-middle-eastern-colorectal-cancer
#8
Abdul K Siraj, Tariq Masoodi, Rong Bu, Poyil Pratheeshkumar, Nasser Al-Sanea, Luai H Ashari, Alaa Abduljabbar, Samar Alhomoud, Fouad Al-Dayel, Fowzan S Alkuraya, Khawla S Al-Kuraya
OBJECTIVE: Colorectal cancer (CRC) is a common cancer and a leading cause of cancer deaths. Previous studies have identified a number of key steps in the evolution of CRC but our knowledge of driver mutations in CRC remains incomplete. Recognising the potential of studying different human populations to reveal novel insights in disease pathogenesis, we conducted genomic analysis of CRC in Saudi patients. DESIGN: In the discovery phase of the study, we conducted whole genome sequencing of tumour and corresponding germline DNA in 27 patients with CRC...
February 9, 2017: Gut
https://www.readbyqxmd.com/read/28183794/novel-insight-in-diarrhoea-predominant-ibs-mirnas-modulate-barrier-function
#9
Mira M Wouters
No abstract text is available yet for this article.
February 9, 2017: Gut
https://www.readbyqxmd.com/read/28179361/a-microbial-signature-for-crohn-s-disease
#10
Victoria Pascal, Marta Pozuelo, Natalia Borruel, Francesc Casellas, David Campos, Alba Santiago, Xavier Martinez, Encarna Varela, Guillaume Sarrabayrouse, Kathleen Machiels, Severine Vermeire, Harry Sokol, Francisco Guarner, Chaysavanh Manichanh
OBJECTIVE: A decade of microbiome studies has linked IBD to an alteration in the gut microbial community of genetically predisposed subjects. However, existing profiles of gut microbiome dysbiosis in adult IBD patients are inconsistent among published studies, and did not allow the identification of microbial signatures for CD and UC. Here, we aimed to compare the faecal microbiome of CD with patients having UC and with non-IBD subjects in a longitudinal study. DESIGN: We analysed a cohort of 2045 non-IBD and IBD faecal samples from four countries (Spain, Belgium, the UK and Germany), applied a 16S rRNA sequencing approach and analysed a total dataset of 115 million sequences...
February 7, 2017: Gut
https://www.readbyqxmd.com/read/28174200/polypoid-lesions-from-the-oesophagus-to-colon
#11
Po-Jui Huang, Chia-Lun Chang, Fat-Moon Suk
No abstract text is available yet for this article.
February 7, 2017: Gut
https://www.readbyqxmd.com/read/28159838/epithelial-organoid-cultures-from-patients-with-ulcerative-colitis-and-crohn-s-disease-a-truly-long-term-model-to-study-the-molecular-basis-for-inflammatory-bowel-disease
#12
LETTER
Manuel Noben, Bram Verstockt, Magali de Bruyn, Nikolai Hendriks, Gert Van Assche, Séverine Vermeire, Catherine Verfaillie, Marc Ferrante
No abstract text is available yet for this article.
February 3, 2017: Gut
https://www.readbyqxmd.com/read/28159837/haemoglobin-decline-before-coeliac-disease-diagnosis-a-nationwide-transfusion-cohort-study-of-1-1-million-blood-donors
#13
LETTER
Jonas F Ludvigsson, Arvid Sjölander, Joseph A Murray, Henrik Hjalgrim, Gustaf Edgren
No abstract text is available yet for this article.
February 3, 2017: Gut
https://www.readbyqxmd.com/read/28159836/c-myc-downregulation-is-required-for-preacinar-to-acinar-maturation-and-pancreatic-homeostasis
#14
Victor J Sánchez-Arévalo Lobo, Luis César Fernández, Enrique Carrillo-de-Santa-Pau, Laia Richart, Isidoro Cobo, Jaroslaw Cendrowski, Ulisses Moreno, Natalia Del Pozo, Diego Megías, Bernardette Bréant, Christopher V Wright, Mark Magnuson, Francisco X Real
BACKGROUND AND AIMS: c-Myc is highly expressed in pancreatic multipotent progenitor cells (MPC) and in pancreatic cancer. The transition from MPC to unipotent acinar progenitors is associated with c-Myc downregulation; a role for c-Myc in this process, and its possible relationship to a role in cancer, has not been established. DESIGN: Using coimmunoprecipitation assays, we demonstrate that c-Myc and Ptf1a interact. Using reverse transcriptase qPCR, western blot and immunofluorescence, we show the erosion of the acinar programme...
February 3, 2017: Gut
https://www.readbyqxmd.com/read/28159835/mir-135a-5p-mediated-downregulation-of-protein-tyrosine-phosphatase-receptor-delta-is-a-candidate-driver-of-hcv-associated-hepatocarcinogenesis
#15
Nicolaas Van Renne, Armando Andres Roca Suarez, Francois H T Duong, Claire Gondeau, Diego Calabrese, Nelly Fontaine, Amina Ababsa, Simonetta Bandiera, Tom Croonenborghs, Nathalie Pochet, Vito De Blasi, Patrick Pessaux, Tullio Piardi, Daniele Sommacale, Atsushi Ono, Kazuaki Chayama, Masashi Fujita, Hidewaki Nakagawa, Yujin Hoshida, Mirjam B Zeisel, Markus H Heim, Thomas F Baumert, Joachim Lupberger
BACKGROUND AND AIMS: HCV infection is a leading risk factor of hepatocellular carcinoma (HCC). However, even after viral clearance, HCC risk remains elevated. HCV perturbs host cell signalling to maintain infection, and derailed signalling circuitry is a key driver of carcinogenesis. Since protein phosphatases are regulators of signalling events, we aimed to identify phosphatases that respond to HCV infection with relevance for hepatocarcinogenesis. METHODS: We assessed mRNA and microRNA (miRNA) expression profiles in primary human hepatocytes, liver biopsies and resections of patients with HCC, and analysed microarray and RNA-seq data from paired liver biopsies of patients with HCC...
February 3, 2017: Gut
https://www.readbyqxmd.com/read/28159834/challenges-in-the-hepatic-histopathology-in-non-alcoholic-fatty-liver-disease
#16
Elizabeth M Brunt, David E Kleiner
No abstract text is available yet for this article.
February 3, 2017: Gut
https://www.readbyqxmd.com/read/28153961/novel-insight-into-the-role-of-microbiota-in-colorectal-surgery
#17
REVIEW
Radu Bachmann, Daniel Leonard, Nathalie Delzenne, Alex Kartheuser, Patrice D Cani
Recent literature undeniably supports the idea that the microbiota has a strong influence on the healing process of an intestinal anastomosis. Understanding the mechanisms by which the bacterial community of the gut influences intestinal healing could open the door for new preventive and therapeutic approaches. Among the different mechanisms, data have shown that the production of specific reactive oxygen species (ROS) and the activation of specific formyl peptide receptors (FPRs) regulate intestinal wound healing...
February 2, 2017: Gut
https://www.readbyqxmd.com/read/28153960/race-dependent-association-of-sulfidogenic-bacteria-with-colorectal-cancer
#18
Cemal Yazici, Patricia G Wolf, Hajwa Kim, Tzu-Wen L Cross, Karin Vermillion, Timothy Carroll, Gaius J Augustus, Ece Mutlu, Lisa Tussing-Humphreys, Carol Braunschweig, Rosa M Xicola, Barbara Jung, Xavier Llor, Nathan A Ellis, H Rex Gaskins
OBJECTIVE: Colorectal cancer (CRC) incidence is higher in African Americans (AAs) compared with non-Hispanic whites (NHWs). A diet high in animal protein and fat is an environmental risk factor for CRC development. The intestinal microbiota is postulated to modulate the effects of diet in promoting or preventing CRC. Hydrogen sulfide, produced by autochthonous sulfidogenic bacteria, triggers proinflammatory pathways and hyperproliferation, and is genotoxic. We hypothesised that sulfidogenic bacterial abundance in colonic mucosa may be an environmental CRC risk factor that distinguishes AA and NHW...
February 2, 2017: Gut
https://www.readbyqxmd.com/read/28148540/acute-lower-gi-bleeding-in-the-uk-patient-characteristics-interventions-and-outcomes-in-the-first-nationwide-audit
#19
Kathryn Oakland, Richard Guy, Raman Uberoi, Rachel Hogg, Neil Mortensen, Michael F Murphy, Vipul Jairath
OBJECTIVE: Lower GI bleeding (LGIB) is a common reason for emergency hospital admission, although there is paucity of data on presentations, interventions and outcomes. In this nationwide UK audit, we describe patient characteristics, interventions including endoscopy, radiology and surgery as well as clinical outcomes. DESIGN: Multicentre audit of adults presenting with LGIB to UK hospitals over 2 months in 2015. Consecutive cases were prospectively enrolled by clinical teams and followed for 28 days...
February 1, 2017: Gut
https://www.readbyqxmd.com/read/28130312/pancreatic-enzyme-replacement-therapy-in-chronic-pancreatitis-a-long-way-to-go
#20
John A Windsor
No abstract text is available yet for this article.
January 27, 2017: Gut
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