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Irritable colon syndrome

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https://www.readbyqxmd.com/read/28603053/colonic-diverticula-are-not-associated-with-mucosal-inflammation-or-chronic-gastrointestinal-symptoms
#1
Anne F Peery, Temitope O Keku, Cassandra Addamo, Amber N McCoy, Christopher F Martin, Joseph A Galanko, Robert S Sandler
BACKGROUND & AIM: Colonic diverticulosis has been reported to be associated with low-grade mucosal inflammation possibly leading to chronic gastrointestinal symptoms. However, there is poor evidence for this association. We aimed to determine whether colonic diverticula are associated with mucosal inflammation and whether diverticula are associated with chronic gastrointestinal symptoms. We explored whether inflammation was present among symptomatic participants with and without diverticula...
June 8, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28592587/linaclotide-activates-guanylate-cyclase-c-cgmp-protein-kinase-ii-dependent-trafficking-of-cftr-in-the-intestine
#2
Md Kaimul Ahsan, Boris Tchernychev, Marco M Kessler, Robert M Solinga, David Arthur, Cristina I Linde, Inmaculada Silos-Santiago, Gerhard Hannig, Nadia A Ameen
The transmembrane receptor guanylyl cyclase-C (GC-C), expressed on enterocytes along the intestine, is the molecular target of the GC-C agonist peptide linaclotide, an FDA-approved drug for treatment of adult patients with Irritable Bowel Syndrome with Constipation and Chronic Idiopathic Constipation. Polarized human colonic intestinal cells (T84, CaCo-2BBe) rat and human intestinal tissues were employed to examine cellular signaling and cystic fibrosis transmembrane conductance regulator (CFTR)-trafficking pathways activated by linaclotide using confocal microscopy, in vivo surface biotinylation, and protein kinase-II (PKG-II) activity assays...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28573746/rifaximin-exerts-beneficial-effects-in-pi-ibs-mouse-model-beyond-gut-microbiota
#3
Yu Jin, Xiaoyang Ren, Gangping Li, Ying Li, Lei Zhang, Huan Wang, Wei Qian, Xiaohua Hou
BACKGROUND AND AIMS: Rifaximin is a minimally absorbed antibiotic which has shown efficacy in irritable bowel syndrome (IBS) patients. However, the mechanism how it effects in IBS is still incompletely defined. In this study, we used Trichinella spiralis infected PI-IBS mouse model, to assess the action of rifaximin on visceral hypersensitivity, barrier function, gut inflammation and microbiota. METHODS: PI-IBS model was established by Trichinella spiralis infection in mice...
June 1, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28557573/putative-mechanisms-of-kiwifruit-on-maintenance-of-normal-gastrointestinal-function
#4
Simone Birgit Bayer, Richard Blair Gearry, Lynley Ngaio Drummond
Kiwifruit are recognized as providing relief from constipation and symptoms of constipation-predominant irritable bowel syndrome (IBS-C). However, the underlying mechanisms, specifically in regards to gastrointestinal transit time and motility, are still not completely understood. This review provides an overview on the physiological and pathophysiological processes underlying constipation and IBS-C, the composition of kiwifruit, and recent advances in the research of kiwifruit and abdominal comfort. Additionally, gaps in the research are highlighted and scientific studies of other foods with known effects on the gastrointestinal tract are consulted to find likely mechanisms of action...
May 30, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28541004/the-effect-of-peripheral-crf-peptide-and-water-avoidance-stress-on-colonic-and-gastric-transit-in-guinea-pigs
#5
Zahid Hussain, Hae Won Kim, Cheal Wung Huh, Young Ju Lee, Hyojin Park
Functional dyspepsia (FD) and irritable bowel syndrome (IBS) are common gastrointestinal (GI) diseases; however, there is frequent overlap between FD and IBS patients. Emerging evidence links the activation of corticotropin releasing factor (CRF) receptors with stress-related alterations of gastric and colonic motor function. Therefore, we investigated the effect of peripheral CRF peptide and water avoidance stress (WAS) on upper and lower GI transit in guinea pigs. Dosages 1, 3, and 10 μg/kg of CRF were injected intraperitoneally (IP) in fasted guinea pigs 30 minutes prior to the intragastric administration of charcoal mix to measure upper GI transit...
July 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28529168/opioids-in-gastroenterology-treating-adverse-effects-and-creating-therapeutic-benefits
#6
Michael Camilleri, Anthony Lembo, David A Katzka
The use of opioid medications on both an acute and chronic basis is ubiquitous in the U.S. As opioid receptors densely populate the gastrointestinal tract, symptoms and side effects can be expected in these patients. In the esophagus, dysmotility may result manifesting with dysphagia and a syndrome indistinguishable from primary achalasia. In the stomach, a marked delay in gastric emptying may ensue with postprandial nausea and early satiety. Postoperatively, particularly with abdominal surgery, opioid induced ileus may ensue...
May 18, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28525373/aquaporins-1-3-and-8-expression-in-irritable-bowel-syndrome-rats-colon-via-nf-%C3%AE%C2%BAb-pathway
#7
Guanqun Chao, Shuo Zhang
OBJECTIVE: Our research was to detect the expression of aquaporins. NF-κB in Irritable bowel syndrome (IBS) rat models' colon so as to find novel pathogenesisof IBS. RESULTS: The expression of AQP1, AQP3, and AQP8 of IBS model group was down-regulated while NF-κB p65 was up-regulated comparing with control group (p < 0.05), and the expression of AQP1, AQP3, and AQP8 of inhibitor group was up-regulated while NF-κB p65 was down-regulated comparing with IBS model group (p < 0...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28522955/colonic-dysmotility-and-morphological-abnormality-frequently-detected-in-japanese-patients-with-irritable-bowel-syndrome
#8
Takeshi Mizukami, Shinya Sugimoto, Tatsuhiro Masaoka, Hidekazu Suzuki, Takanori Kanai
BACKGROUND/AIMS: Colonoscopy and computed tomography (CT) are used primarily to exclude organic diseases in patients with irritable bowel syndrome (IBS), rather than to assess the pathophysiology of IBS. We aimed to evaluate colonic dysmotility and morphology in Japanese patients with IBS. METHODS: One hundred eighty-four patients with IBS and 49 asymptomatic controls who underwent colonoscopy in combination with CT colonography or barium enema were retrospectively reviewed between 2008 and 2012...
April 2017: Intestinal Research
https://www.readbyqxmd.com/read/28522910/comparison-of-the-analgesic-effects-between-electro-acupuncture-and-moxibustion-with-visceral-hypersensitivity-rats-in-irritable-bowel-syndrome
#9
Ji-Meng Zhao, Liang Li, Liu Chen, Yin Shi, Yu-Wei Li, Hai-Xia Shang, Lu-Yi Wu, Zhi-Jun Weng, Chun-Hui Bao, Huan-Gan Wu
AIM: To observe whether there are differences in the effects of electro-acupuncture (EA) and moxibustion (Mox) in rats with visceral hypersensitivity. METHODS: EA at 1 mA and 3 mA and Mox at 43 °C and 46 °C were applied to the Shangjuxu (ST37, bilateral) acupoints in model rats with visceral hypersensitivity. Responses of wide dynamic range neurons in dorsal horns of the spinal cord were observed through the extracellular recordings. Mast cells (MC) activity in the colons of rats were assessed, and 5-hydroxytryptamine (5-HT), 5-hydroxytryptamine 3 receptor (5-HT3R) and 5-HT4R expressions in the colons were measured...
April 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28522900/high-throughput-rna-sequencing-utility-for-diagnosis-and-prognosis-in-colon-diseases
#10
EDITORIAL
Mamie Gao, Allen Zhong, Neil Patel, Chiraag Alur, Dinesh Vyas
RNA sequencing is the use of high throughput next generation sequencing technology to survey, characterize, and quantify the transcriptome of a genome. RNA sequencing has been used to analyze the pathogenesis of several malignancies such melanoma, lung cancer, and colorectal cancer. RNA sequencing can identify differential expression of genes (DEG's), mutated genes, fusion genes, and gene isoforms in disease states. RNA sequencing has been used in the investigation of several colorectal diseases such as colorectal cancer, inflammatory bowel disease (ulcerative colitis and Crohn's disease), and irritable bowel syndrome...
April 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28509372/differential-expression-of-micrornas-related-to-irritable-bowel-syndrome-in-a-rabbit-model
#11
Qinqin Yang, Xiaoping Xu, Hongshu Zhao, Yueqin Cai, Yongming Pan, Jianqin Xu, Quanxin Ma, Minli Chen
AIM: In the study we evaluated differential expression of miRNAs in the white hair and black eyes(WHBE) rabbit model of irritable bowel syndrome(IBS). METHODS: WHBE IBS rabbits were exposed to moist heat, stress, and stimulation with a low-dose laxative. Intestional propulsion rate(IPR) was measured. Blood samples were taken to detect changes in serum 5-hydroxytryptamine(5-HT) and dopamine(DA) levels, and colon tissues were to detect c-fos by immunohistochemistry...
May 16, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28452565/administration-of-wasabia-koreana-ameliorates-irritable-bowel-syndrome-like-symptoms-in-a-zymosan-induced-mouse-model
#12
Bo-Kyung Park, Eunho Chun, Jeong June Choi, Younmin Shin, Young Tak Kho, Seung Hyun Oh, Sun Yeou Kim, Taek Hwan Lee, Tae-Wan Kim, Eunju Shin, Seon-Gil Do, Mirim Jin
Irritable bowel syndrome (IBS) is a functional gastrointestinal disease with complex pathophysiology involving the brain-gut axis. To assess the effects of Wasabia koreana (WK) on IBS, we employed a mouse model of colonic zymosan injection presenting with diarrhea-predominant IBS-like symptoms. Oral WK administration significantly diminished stool score, suppressed colon length and weight change, and minimized body weight loss without affecting food intake. In WK-treated mice, the submucosal thickening and epithelial lining of the colon were inhibited and were similar to those of naïve mice...
May 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28448580/sildenafil-normalizes-bowel-transit-in-preclinical-models-of-constipation
#13
Sarah K Sharman, Bianca N Islam, Yali Hou, Margaux Usry, Allison Bridges, Nagendra Singh, Subbaramiah Sridhar, Satish Rao, Darren D Browning
Guanylyl cyclase-C (GC-C) agonists increase cGMP levels in the intestinal epithelium to promote secretion. This process underlies the utility of exogenous GC-C agonists such as linaclotide for the treatment of chronic idiopathic constipation (CIC) and irritable bowel syndrome with constipation (IBS-C). Because GC-C agonists have limited use in pediatric patients, there is a need for alternative cGMP-elevating agents that are effective in the intestine. The present study aimed to determine whether the PDE-5 inhibitor sildenafil has similar effects as linaclotide on preclinical models of constipation...
2017: PloS One
https://www.readbyqxmd.com/read/28440889/a-glucagon-like-peptide-1-analog-liraglutide-improves-visceral-sensation-and-gut-permeability-in-rats
#14
Tsukasa Nozu, Saori Miyagishi, Shima Kumei, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura
BACKGROUND AND AIM: A glucagon-like peptide-1 (GLP-1) analog, liraglutide, has been reported to block inflammatory somatic pain. We hypothesized that liraglutide attenuates lipopolysaccharide (LPS)- and repeated water avoidance stress (WAS)-induced visceral hypersensitivity and tested the hypothesis in rats. METHODS: The threshold of the visceromotor response (VMR) induced by colonic balloon distention was measured to assess visceral sensation. Colonic permeability was determined in vivo by quantifying the absorbed Evans blue spectrophotometrically, which was instilled in the proximal colon for 15 min...
April 25, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28410580/lactobacillus-casei-dg-and-its-postbiotic-reduce-the-inflammatory-mucosal-response-an-ex-vivo-organ-culture-model-of-post-infectious-irritable-bowel-syndrome
#15
Debora Compare, Alba Rocco, Pietro Coccoli, Debora Angrisani, Costantino Sgamato, Barbara Iovine, Umberto Salvatore, Gerardo Nardone
BACKGROUND: The evidence on the role of gut microbiota in post-infectious irritable bowel syndrome (PI-IBS) is convincing. Lactobacillus spp. positively affect IBS symptoms, although the mechanisms through which probiotics exert their beneficial effects are largely unknown. The aim of the study is to evaluate the role of Lactobacillus casei DG (LC-DG) and its postbiotic (PB) in modulating the inflammatory/immune-response in PI-IBS in an ex-vivo organ culture model. METHODS: Ex vivo cultures of ileal and colonic mucosa from 10 PI-IBS, diarrhea predominant subtype (D) patients, and 10 healthy controls (HC) were treated with LPS, LC-DG and PB...
April 14, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28395430/-changes-of-adherens-junctions-between-the-epithelial-cells-of-intestinal-mucosal-barrier-in-irritable-bowel-syndrome
#16
C Y Chen, M Zhang, S S Wang, B Lü, X Wang
Objective: To investigate whether there are changes in adherens junctions(AJ), including E-cadherin (E-cad) and β-catenin (β-cat), in the colonic mucosa of irritable bowel syndrome (IBS). Methods: Colorectal dilatation combined with restraint stress was used to establish IBS SD rat model. There were 8 rats in the model group and 8 rats in normal control group. From each rat, the colon tissue 5 centimeters away from ileocecum (I) and the junction of the rectum and sigmoid colon (R) were taken, in which E-cad and β-cat mRNA, protein level and structural changes were detected using real-time quantitative-PCR, Western blot, and immunofluorescence...
April 11, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28346927/microbiota-in-functional-gastrointestinal-disorders-in-infancy-implications-for-management
#17
Thomas R Abrahamsson, Richard Y Wu, Philip M Sherman
The complex and diverse intestinal microbiome is recognized as important in promoting human health. An altered gut microflora, referred to as dysbiosis, is increasingly recognized as having an etiologic role in a variety of conditions, including functional gastrointestinal disorders: colic in infants and irritable bowel syndrome in older children. Probiotics are defined as live microorganisms that, if ingested in sufficient amounts, restore microbial homeostasis and have a benefit on health. Randomized controlled trials indicate that probiotics can be effective in a variety of intestinal conditions, including colic and irritable bowel syndrome...
2017: Nestlé Nutrition Institute Workshop Series
https://www.readbyqxmd.com/read/28346031/chromogranin-a-cell-density-in-the-large-intestine-of-asian-and-european-patients-with-irritable-bowel-syndrome
#18
Magdy El-Salhy, Tanisa Patcharatrakul, Jan Gunnar Hatlebakk, Trygve Hausken, Odd Helge Gilja, Sutep Gonlachanvit
OBJECTIVE: Patients with irritable bowel syndrome (IBS) in Asia show distinctive differences from those in the western world. The gastrointestinal endocrine cells appear to play an important role in the pathophysiology of IBS. The present study aimed at studying the density of chromogranin A (CgA) cells in the large intestine of Thai and Norwegian IBS patients. METHODS: Thirty Thai IBS patients and 20 control subjects, and 47 Norwegian IBS patients and 20 control subjects were included...
June 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28344794/does-calprotectin-level-identify-a-subgroup-among-patients-suffering-from-irritable-bowel-syndrome-results-of-a-prospective-study
#19
Chloé Melchior, Moutaz Aziz, Typhaine Aubry, Guillaume Gourcerol, Muriel Quillard, Alberto Zalar, Moïse Coëffier, Pierre Dechelotte, Anne-Marie Leroi, Philippe Ducrotté
BACKGROUND: Irritable bowel syndrome is a multifactorial disease. Although faecal calprotectin has been shown to be a reliable marker of intestinal inflammation, its role in irritable bowel syndrome remains debated. OBJECTIVE: The aims of this prospective study were to select a subgroup of irritable bowel syndrome patients and to characterise those patients with high faecal calprotectin by systematic work-up. METHODS: Calprotectin levels were determined by enzyme-linked immunosorbent assay test in consecutive irritable bowel syndrome patients fulfilling Rome III criteria in whom normal colonoscopy and appropriate tests had excluded organic disease...
March 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28333903/-evaluation-of-oro-cecal-transit-time-in-patients-with-irritable-bowel-syndrome-with-cereal-products-intolerance
#20
Aleksandra Błońska, Paulina Konrad, Jan Chojnacki, Cezary Chojnacki
The main symptoms of irritable bowel syndrome (IBS) include abnormal frequency of bowel movements. On this basis, three main clinical types of the disease have been distinguished, i.e.: constipation (IBSC), diarrhea (IBS-D) and mixed-type (IBS-M) in accordance with the Rome III criteria. These disorders mainly affect the colon, but symptoms related to upper gastrointestinal tract are also often observed. AIM: The aim of the study was to assess the oro-caecal transit time in patients with irritable bowel syndrome with IgG-dependent hypersensitivity to cereal products...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
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