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Intestinal Motility

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https://www.readbyqxmd.com/read/28240194/brain-and-gut-crf-signaling-biological-actions-and-role-in-the-gastrointestinal-tract
#1
Million Mulugeta, Yvette Taché, Muriel Larauche, Pu-Qing Yuan
Corticotropin-releasing factor (CRF) signaling pathways coordinate the behavioral, endocrine, autonomic and visceral responses to stress. Convergent anatomical, molecular, pharmacological and functional experimental evidence supports an important role of brain CRF receptor signaling in stress-related alterations of gastrointestinal functions. These include the inhibition of gastric acid secretion and gastro-small intestinal transit, the stimulation of colonic enteric nervous system and secretory-motor function, enhanced intestinal permeability, and visceral hypersensitivity...
February 23, 2017: Current Molecular Pharmacology
https://www.readbyqxmd.com/read/28238732/ghrelin-and-cancer-progression
#2
REVIEW
Tsung-Chieh Lin, Michael Hsiao
Ghrelin is a small peptide with 28 amino acids, and has been characterized as the ligand of the growth hormone secretagogue receptor (GHSR). In addition to its original function in stimulating pituitary growth hormone release, ghrelin is multifunctional which plays role in the regulation of energy balance, gastric acid release, appetite, insulin secretion, gastric motility and the turnover of gastric and intestinal mucosa. The discovery of ghrelin and GHSR expression beyond normal tissues suggests its role other than physiological function...
February 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28228489/age-dependent-shift-in-macrophage-polarisation-causes-inflammation-mediated-degeneration-of-enteric-nervous-system
#3
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/28221905/efficacy-of-plant-derived-antimicrobials-in-controlling-enterohemorrhagic-escherichia-coli-virulence-in-vitro
#4
Sangeetha Ananda Baskaran, Anup Kollanoor-Johny, Meera Surendran Nair, Kumar Venkitanarayanan
Escherichia coli O157:H7 is a major foodborne pathogen that can cause serious human illness characterized by hemorrhagic diarrhea and kidney failure. The pathology of enterohemorrhagic E. coli O157:H7 (EHEC) infection is primarily mediated by verotoxins, which bind to the globotriaosylceramide receptor on host cells. Antibiotics are contraindicated for treating EHEC infection because they lead to increased verotoxin release, thereby increasing the risk of renal failure and death in patients. Thus, alternative strategies are needed for controlling EHEC infections in humans...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28220074/involvement-of-cannabinoid-signaling-in-vincristine-induced-gastrointestinal-dysmotility-in-the-rat
#5
Gema Vera, Ana E López-Pérez, José A Uranga, Rocío Girón, Ma Isabel Martín-Fontelles, Raquel Abalo
Background: In different models of paralytic ileus, cannabinoid receptors are overexpressed and endogenous cannabinoids are massively released, contributing to gastrointestinal dysmotility. The antitumoral drug vincristine depresses gastrointestinal motility and a similar mechanism could participate in this effect. Therefore, our aim was to determine, using CB1 and CB2 antagonists, whether an increased endocannabinoid tone is involved in vincristine-induced gastrointestinal ileus. Methods: First, we confirmed the effects of vincristine on the gut mucosa, by conventional histological techniques, and characterized its effects on motility, by radiographic means...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28216898/depolarizing-effects-of-daikenchuto-on-interstitial-cells-of-cajal-from-mouse-small-intestine
#6
Hyungwoo Kim, Hyun Jung Kim, Dongki Yang, Myeong Ho Jung, Byung Joo Kim
BACKGROUND: Daikenchuto (DKT; TJ-100, TU-100), a traditional herbal medicineis used in modern medicine to treat gastrointestinal (GI) functional disorders. Interstitial cells of Cajal (ICCs) are the pacemaker cells of the GI tract and play important roles in the regulation of GI motility. OBJECTIVE: The objective of this study was to investigate the effects of DKT on the pacemaker potentials (PPs) of cultured ICCs from murine small intestine. MATERIALS AND METHODS: Enzymatic digestions were used to dissociate ICCs from mouse small intestine tissues...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28214685/role-of-laxative-and-antioxidant-properties-of-malva-sylvestris-leaves-in-constipation-treatment
#7
Mohamed-Amine Jabri, Dalanda Wannes, Najla Hajji, Mohsen Sakly, Lamjed Marzouki, Hichem Sebai
INTRODUCTION: Mallaw (Malva sylvestris L.) is a medicinal plant who is traditionally being used as an antiulcer, laxative and anti-hemorrhoid, besides of its culinary use as a food in Tunisian cuisine. The present study was carried out to evaluate the protective effect of Malva sylvestris aqueous extract (MSAE) on constipation- induced by loperamide in male Wistar rats. METHODS: Rats were divided into six groups of six animals each: Control, Loperamide (LOP), LOP+ yohimbine (2mg/kg b...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28204957/insights-into-the-role-of-opioid-receptors-in-the-gi-tract-experimental-evidence-and-therapeutic-relevance
#8
James J Galligan, Catia Sternini
Opioid drugs are prescribed extensively for pain treatment but when used chronically they induce constipation that can progress to opioid-induced bowel dysfunction. Opioid drugs interact with three classes of opioid receptors: mu opioid receptors (MORs), delta opioid receptors (DOR), and kappa opioid receptors (KORs), but opioid drugs mostly target the MORs. Upon stimulation, opioid receptors couple to inhibitory Gi/Go proteins that activate or inhibit downstream effector proteins. MOR and DOR couple to inhibition of adenylate cyclase and voltage-gated Ca(2+) channels and to activation of K(+) channels resulting in reduced neuronal activity and neurotransmitter release...
February 16, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28203684/crushed-sublingual-versus-oral-ticagrelor-administration-strategies-in-patients-with-unstable-angina-a-pharmacokinetic-pharmacodynamic-study
#9
Piotr Niezgoda, Joanna Sikora, Malwina Barańska, Adam Sikora, Katarzyna Buszko, Emilia Siemińska, Michał Piotr Marszałł, Jolanta M Siller-Matula, Bernd Jilma, Dimitrios Alexopoulos, Tomasz Fabiszak, Jacek Kubica
Oral administration of crushed ticagrelor tablets turned out to be an efficacious method that improves its pharmacokinetics and pharmacodynamics. This strategy, however, is unlikely to eliminate the drug-drug interaction in patients receiving intravenous morphine, as the impairment of the P2Y12 inhibitor absorption related to decreased propulsive motility of the gastro-intestinal tract is the most likely mechanism of interaction. Thus, we designed a pharmacokinetic and pharmacodynamic study setting the feasibility of platelet inhibition with a loading dose of ticagrelor given as crushed tablets sublingually compared with two other ticagrelor loading dose administration strategies: integral tablet given orally and crushed tablet given orally in patients with unstable angina...
February 16, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28195732/in-vivo-predictive-dissolution-ipd-and-biopharmaceutical-modeling-and-simulation-future-use-of-modern-approaches-and-methodologies-in-a-regulatory-context
#10
H Lennernas, A Lindahl, A Van Peer, C Ollier, T Flanagan, R Lionberger, A Nordmark, S Yamashita, L Yu, G L Amidon, V Fischer, E Sjögren, P Zane, M McAllister, B Abrahamsson
The overall objective of OrBiTo, a project within Innovative Medicines Initiative (IMI), is to streamline and optimize the development of orally administered drug products through the creation and efficient application of biopharmaceutics tools. This toolkit will include both experimental and computational models developed on improved understanding of the highly dynamic gastrointestinal (GI) physiology relevant to the GI absorption of drug products in both fasted and fed states. A part of the annual OrBiTo-meeting in 2015 was dedicated to the presentation of the most recent progress in the development of the regulatory use of PBPK in silico modeling, in vivo predictive dissolution (IPD) tests and their application to biowaivers...
February 14, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28195513/inducible-and-neuronal-nitric-oxide-synthases-exert-contrasting-effects-during-rat-intestinal-recovery-following-fasting
#11
Junta Ito, Hiroyuki Uchida, Naomi Machida, Kazuo Ohtake, Yuki Saito, Jun Kobayashi
We investigated the effects of endogenous inducible (iNOS) and neuronal nitric oxide synthase on recovery from intestinal mucosal atrophy caused by fasting-induced apoptosis and decreased cell proliferation during refeeding in rats. Rats were divided into five groups, one of which was fed ad libitum, and four of which underwent 72 h of fasting, followed by refeeding for 0, 6, 24, and 48 h, respectively. iNOS and neuronal nitric oxide synthase mRNA and protein levels in jejunal tissues were measured, and mucosal height was histologically evaluated...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28191706/g-protein-coupled-estrogen-receptor-and-estrogen-receptor-ligands-regulate-colonic-motility-and-visceral-pain
#12
M Zielińska, J Fichna, M Bashashati, S Habibi, A Sibaev, J-P Timmermans, M Storr
BACKGROUND: Diarrhea-predominant irritable bowel syndrome (IBS-D) is a functional gastrointestinal (GI) disorder, which occurs more frequently in women than men. The aim of our study was to determine the role of activation of classical estrogen receptors (ER) and novel membrane receptor, G protein-coupled estrogen receptor (GPER) in human and mouse tissue and to assess the possible cross talk between these receptors in the GI tract. METHODS: Immunohistochemistry was used to determine the expression of GPER in human and mouse intestines...
February 12, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28190556/cotransplantation-of-neuroepithelial-stem-cells-with-interstitial-cells-of-cajal-improves-neuronal-differentiation-in-a-rat-aganglionic-model
#13
Lijuan Zhang, Bin Zhao, Wei Liu, Rui Ma, Rongde Wu, Yingmao Gao
BACKGROUND: Recent advances have raised the possibility of treating Hirschsprung's disease (HSCR) with transplanted neural stem cells. Although these cells have been shown to migrate and differentiate after transplantation, the restoration of intestinal motility by grafted cells is also mediated via the interstitial cells of Cajal (ICCs). We therefore aimed to evaluate the effect of cografting with ICC on neural stem cells after transplanted into aganglionic bowel. METHODS: Neuroepithelial stem cells (NESCs) and ICCs were isolated from neural tube of embryonic rat (embryonic day 11...
February 4, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28186337/impaired-intestinal-cholecystokinin-secretion-a-fascinating-but-overlooked-link-between-celiac-disease-and-cholesterol-gallstone-disease
#14
REVIEW
Helen H Wang, Min Liu, Xiaodan Li, Piero Portincasa, David Q-H Wang
BACKGROUND: Celiac disease is a chronic, small intestinal, immune-mediated enteropathy caused by a permanent intolerance to dietary gluten in genetically predisposed individuals. Clinical studies have found that intestinal cholecystokinin secretion and gallbladder emptying in response to a fatty meal are impaired before celiac patients start the gluten-free diet (GFD). DESIGN: However, it was never really appreciated whether celiac disease is associated with gallstones because there were very few studies investigating the mechanism underlying the impact of celiac disease on the pathogenesis of gallstones...
February 10, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28185628/use-of-bedside-abdominal-ultrasound-to-confirm-intestinal-motility-in-neonates-with-gastroschisis-a-feasibility-study
#15
Lori A Gurien, Deidre L Wyrick, Melvin S Dassinger, Jeffrey M Burford, Steven C Mehl, Marie E Saylors, Samuel D Smith
BACKGROUND: Optimal timing to begin feeds in neonates with gastroschisis remains unclear. We examined if bedside abdominal ultrasound for intestinal motility is a feasible tool to detect return of bowel function in neonates with gastroschisis. METHODS: Neonates born with uncomplicated gastroschisis who underwent closure received daily ultrasound exams. Full motility was defined as peristalsis seen in all quadrants. Average length of time between abdominal wall closure and start of enteral feeds, full ultrasound motility, and clinical characteristics was compared using Student's t-tests...
January 26, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28184185/promotility-action-of-the-probiotic-bifidobacterium-lactis-hn019-extract-compared-with-prucalopride-in-isolated-rat-large-intestine
#16
Julie E Dalziel, Rachel C Anderson, Jason S Peters, Amy T Lynch, Nick J Spencer, James Dekker, Nicole C Roy
Attention is increasingly being focussed on probiotics as potential agents to restore or improve gastrointestinal (GI) transit. Determining mechanism of action would support robust health claims. The probiotic bacterium Bifidobacterium lactis HN019 reduces transit time, but its mechanisms of action and effects on motility patterns are poorly understood. The aim of this study was to investigate changes in GI motility induced by an extract of HN019 on distinct patterns of colonic motility in isolated rat large intestine, compared with a known promotility modulator, prucalopride...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28183311/evaluation-of-the-antidiarrheal-activity-of-the-leaf-extracts-of-myrtus-communis-linn-myrtaceae-in-mice-model
#17
Mekonnen Sisay, Ephrem Engidawork, Workineh Shibeshi
BACKGROUND: Myrtus communis L. has a folkloric repute for the management of diarrhea and dysentery in different parts of the world. However, the safety and efficacy of the leaf extract have not been scientifically validated in animal model. This study was, therefore, aimed to investigate the antidiarrheal effect of 80% methanol extract (80ME) and solvent fractions of the leaves of Myrtus communis L. in mice. METHODS: The antidiarrheal activity of the 80ME and solvent fractions was evaluated against castor oil induced diarrheal model, charcoal meal and enteropooling tests...
February 10, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28180937/guidelines-for-the-management-of-postoperative-obstructive-symptoms-in-children-with-hirschsprung-disease
#18
REVIEW
J C Langer, M D Rollins, M Levitt, A Gosain, L de la Torre, R P Kapur, R A Cowles, J Horton, D H Rothstein, A M Goldstein
Although most children with Hirschsprung disease ultimately do well, many experience a variety of ongoing problems after pull-through surgery. The most common include obstructive symptoms, soiling, enterocolitis and failure to thrive. The purpose of this guideline is to present a rational approach to the management of postoperative obstructive symptoms in children with Hirschsprung disease. The American Pediatric Surgical Association Board of Governors established a Hirschsprung Disease Interest Group. Group discussions, literature review and expert consensus were then used to summarize the current state of knowledge regarding causes, methods of diagnosis, and treatment approaches to children with obstructive symptoms following pull-through for Hirschsprung disease...
February 8, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28169277/investigation-of-the-role-of-tyrosine-kinase-receptor-epha3-in-colorectal-cancer
#19
Elena Andretta, Fernando Cartón-García, Águeda Martínez-Barriocanal, Priscila Guimarães de Marcondes, Lizbeth M Jimenez-Flores, Irati Macaya, Sarah Bazzocco, Josipa Bilic, Paulo Rodrigues, Rocio Nieto, Stefania Landolfi, Santiago Ramon Y Cajal, Simo Schwartz, Arthur Brown, Higinio Dopeso, Diego Arango
EPH signaling deregulation has been shown to be important for colorectal carcinogenesis and genome-wide sequencing efforts have identified EPHA3 as one of the most frequently mutated genes in these tumors. However, the role of EPHA3 in colorectal cancer has not been thoroughly investigated. We show here that ectopic expression of wild type EPHA3 in colon cancer cells did not affect their growth, motility/invasion or metastatic potential in vivo. Moreover, overexpression of mutant EPHA3 or deletion of the endogenous mutant EPHA3 in colon cancer cells did not affect their growth or motility...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28166091/oral-polyphosphate-suppresses-bacterial-collagenase-production-and-prevents-anastomotic-leak-due-to-serratia-marcescens-and-pseudomonas-aeruginosa
#20
Sanjiv K Hyoju, Robin E Klabbers, Melissa Aaron, Monika A Krezalek, Alexander Zaborin, Mara Wiegerinck, Neil H Hyman, Olga Zaborina, Harry Van Goor, John C Alverdy
OBJECTIVE: The objective of this study was to determine the effect of polyphosphate on intestinal bacterial collagenase production and anastomotic leak in mice undergoing colon surgery. BACKGROUND: We have previously shown that anastomotic leak can be caused by intestinal pathogens that produce collagenase. Because bacteria harbor sensory systems to detect the extracellular concentration of phosphate which controls their virulence, we tested whether local phosphate administration in the form of polyphosphate could attenuate pathogen virulence and prevent leak without affecting bacterial growth...
February 3, 2017: Annals of Surgery
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