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Gastrointestinal motility

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https://www.readbyqxmd.com/read/28644253/spectrum-of-autonomic-nervous-system-impairment-in-sj%C3%A3-gren-syndrome
#1
Brent P Goodman, Amy Crepeau, Priya S Dhawan, Julie A Khoury, Lucinda A Harris
OBJECTIVE: To describe the spectrum of autonomic dysfunction in a uniformly evaluated cohort of patients with Sjögren syndrome. METHODS: A series of 13 patients underwent a comprehensive evaluation for suspected autonomic impairment, including a neurological examination, autonomic testing, and laboratory studies. A diagnosis of Sjögren syndrome was established as the cause of autonomic dysfunction in all. Clinical features, findings on autonomic testing, and laboratory results are described...
July 2017: Neurologist
https://www.readbyqxmd.com/read/28644080/determination-of-gastrointestinal-transit-times-in-barred-owls-strix-varia-by-contrast-fluoroscopy
#2
Grayson A Doss, Jackie M Williams, Christoph Mans
Contrast imaging studies are routinely performed in avian patients when an underlying abnormality of the gastrointestinal (GI) tract is suspected. Fluoroscopy offers several advantages over traditional radiography and can be performed in conscious animals with minimal stress and restraint. Although birds of prey are commonly encountered as patients, little is known about GI transit times and contrast imaging studies in these species, especially owls. Owls are commonly encountered in zoological, educational, and wildlife settings...
June 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28642718/irinotecan-induced-gastrointestinal-dysfunction-is-associated-with-enteric-neuropathy-but-increased-numbers-of-cholinergic-myenteric-neurons
#3
Rachel M McQuade, Vanesa Stojanovska, Elizabeth L Donald, Ahmed A Rahman, Dean G Campelj, Raquel Abalo, Emma Rybalka, Joel C Bornstein, Kulmira Nurgali
Gastrointestinal dysfunction is a common side-effect of chemotherapy leading to dose reductions and treatment delays. These side-effects may persist up to 10 years post-treatment. A topoisomerase I inhibitor, irinotecan (IRI), commonly used for the treatment of colorectal cancer, is associated with severe acute and delayed-onset diarrhea. The long-term effects of IRI may be due to damage to enteric neurons innervating the gastrointestinal tract and controlling its functions. Balb/c mice received intraperitoneal injections of IRI (30 mg/kg(-1)) 3 times a week for 14 days, sham-treated mice received sterile water (vehicle) injections...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28642706/toll-like-receptor-4-modulates-small-intestine-neuromuscular-function-through-nitrergic-and-purinergic-pathways
#4
Valentina Caputi, Ilaria Marsilio, Silvia Cerantola, Mona Roozfarakh, Isabella Lante, Francesca Galuppini, Massimo Rugge, Eleonora Napoli, Cecilia Giulivi, Genny Orso, Maria Cecilia Giron
Objective: Toll-like receptors (TLRs) play a pivotal role in the homeostatic microflora-host crosstalk. TLR4-mediated modulation of both motility and enteric neuronal survival has been reported mainly for colon with limited information on the role of TLR4 in tuning structural and functional integrity of enteric nervous system (ENS) and in controlling small bowel motility. Methods: Male TLR4 knockout (TLR4(-/-), 9 ± 1 weeks old) and sex- and age-matched wild-type (WT) C57BL/6J mice were used for the experiments...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28638787/bioadhesive-bacterial-microswimmers-for-targeted-drug-delivery-in-the-urinary-and-gastrointestinal-tracts
#5
Babak Mostaghaci, Oncay Yasa, Jiang Zhuang, Metin Sitti
Bacteria-driven biohybrid microswimmers (bacteriabots), which integrate motile bacterial cells and functional synthetic cargo parts (e.g., microparticles encapsulating drug), are recently studied for targeted drug delivery. However, adhesion of such bacteriabots to the tissues on the site of a disease (which can increase the drug delivery efficiency) is not studied yet. Here, this paper proposes an approach to attach bacteriabots to certain types of epithelial cells (expressing mannose on the membrane), based on the affinity between lectin molecules on the tip of bacterial type I pili and mannose molecules on the epithelial cells...
June 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28638366/gonadotropin-releasing-hormone-and-its-role-in-the-enteric-nervous-system
#6
REVIEW
Bodil Ohlsson
Gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone, and luteinizing hormone orchestrate the reproduction cycle and regulate the sex steroid secretion from the gonads. In mammals, GnRH1 is secreted as a hormone from the hypothalamus, whereas both GnRH1 and GnRH2 are present as neurotransmitters/peptides in various tissues, where the peptides exert many different effects. mRNA coding for GnRH1 and GnRH2 have been described in the human gastrointestinal tract, and GnRH has been found in both submucosal and myenteric neurons...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28637804/bioactive-immune-components-of-anti-diarrheagenic-enterotoxigenic-e-coli-etec-hyperimmune-bovine-colostrum-products
#7
Khandra T Sears, Sharon M Tennant, Mardi K Reymann, Raphael Simon, Nicky Konstantopoulos, William C Blackwelder, Eileen M Barry, Marcela F Pasetti
Diarrhea is a common illness among travelers to resource-limited countries, the most prevalent attributable agent being enterotoxigenic Escherichia coli (ETEC). There are presently no vaccines licensed specifically for the prevention of ETEC-induced traveler's diarrhea (TD), and this has propelled investigation of alternative preventive methods. Colostrum, the first milk expressed after birthing, is rich in immunoglobulins and innate immune components for protection of newborns against infectious agents. Hyperimmune bovine colostrum (HBC) produced by immunization of cows during gestation (and containing high levels of specific antibodies) is a practical and effective prophylactic tool against gastrointestinal illnesses...
June 21, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28637453/electroacupuncture-at-li11-promotes-jejunal-motility-via-the-parasympathetic-pathway
#8
Xuanming Hu, Mengqian Yuan, Yin Yin, Yidan Wang, Yuqin Li, Na Zhang, Xueyi Sun, Zhi Yu, Bin Xu
BACKGROUND: Gastrointestinal motility disorder has been demonstrated to be regulated by acupuncture treatment. The mechanisms underlying the effects of acupuncture stimulation of abdominal and lower limb acupoints on gastrointestinal motility have been thoroughly studied; however, the physiology underlying the effects of acupuncture on the forelimbs to mediate gastrointestinal motility requires further exploration. The aim of this study was to determine whether electroacupuncture (EA) at LI11 promotes jejunal motility, whether the parasympathetic pathway participates in this effect, and if so, which somatic afferent nerve fibres are involved...
June 21, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28631728/acg-and-cag-clinical-guideline-management-of-dyspepsia
#9
Paul M Moayyedi, Brian E Lacy, Christopher N Andrews, Robert A Enns, Colin W Howden, Nimish Vakil
We have updated both the American College of Gastroenterology (ACG) and the Canadian Association of Gastroenterology (CAG) guidelines on dyspepsia in a joint ACG/CAG dyspepsia guideline. We suggest that patients ≥60 years of age presenting with dyspepsia are investigated with upper gastrointestinal endoscopy to exclude organic pathology. This is a conditional recommendation and patients at higher risk of malignancy (such as spending their childhood in a high risk gastric cancer country or having a positive family history) could be offered an endoscopy at a younger age...
June 20, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28631296/hydrogen-sulphide-as-a-signaling-molecule-regulating-physiopathological-processes-in-gastrointestinal-motility
#10
REVIEW
M Jimenez, V Gil, M Martinez-Cutillas, N Mañé, D Gallego
The biology of H2 S is an emerging area of research since several biological functions have been recently attributed to this gaseous molecule in a vast number of regions including the cardiovascular, urogenital, respiratory, digestive and central nervous system. H2 S exerts anti-inflammatory effects and can be considered an endogenous mediator with potential effects on gastrointestinal motility. During the last years, our research group has investigated the role of H2 S as a regulator of gastrointestinal motility using both animal and human tissues...
June 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28628846/substance-p-and-the-neurokinin-1-receptor-expression-in-dog-ileum-with-and-without-inflammation
#11
Giulia Polidoro, Fiorella Giancola, Federico Fracassi, Marco Pietra, Giuliano Bettini, Martina Asti, Roberto Chiocchetti
In the gastrointestinal tract, the tachykinin Substance P (SP) is involved in motility, fluid and electrolyte secretion, and blood flow and regulation of immunoinflammatory response. SP exerts its biological activity on target cells by interacting mainly with the neurokinin-1 receptor (NK1R). The present study aims to quantify the percentage of SP-immunoreactive (SP-IR) enteric neurons and the density of SP-IR nerve fibers in the ileum of control dogs (CTRL-dogs; n=7) vs dogs with spontaneous ileal inflammation (INF-dogs; n=8)...
June 12, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28621589/effect-of-hospitalization-on-gastrointestinal-motility-and-ph-in-dogs
#12
Kanawee Warrit, Pedro Boscan, Leah E Ferguson, Allison M Bradley, Kristy L Dowers, David C Twedt
OBJECTIVE To determine the effect of hospitalization on gastrointestinal motility and pH in healthy dogs. DESIGN Experimental study. ANIMALS 12 healthy adult dogs. PROCEDURES A wireless motility capsule (WMC) that measured pressure, transit time, and pH within the gastrointestinal tract was administered orally to dogs in 2 phases. In the first phase, dogs received the WMC at the hospital and then returned to their home to follow their daily routine. In the second phase, dogs were hospitalized, housed individually, had abdominal radiography performed daily, and were leash exercised 4 to 6 times/d until the WMC passed in the feces...
July 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28620922/supraspinal-inhibitory-effects-of-chimeric-peptide-mcrt-on-gastrointestinal-motility-in-mice
#13
Chunbo He, Hailan Li, Jing Zhang, Yanping Kang, Fang Jia, Shouliang Dong, Lanxia Zhou
OBJECTIVES: Chimeric peptide MCRT, based on morphiceptin and PFRTic-NH2 , was a bifunctional ligand of μ- and δ-opioid receptors (MOR-DOR) and produced potent analgesia in tail-withdrawal test. The study focused on the supraspinal effects of morphiceptin, PFRTic-NH2 and MCRT on gastrointestinal motility. Moreover, opioid receptor antagonists, naloxone (non-selective), cyprodime (MOR selective) and naltrindole (DOR selective) were utilized to explore the mechanisms. METHODS: Intracerebroventricular administration was achieved via the implanted cannula...
June 16, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28620692/the-enteric-nervous-system-is-a-potential-autoimmune-target-in-multiple-sclerosis
#14
Marie Wunsch, Samir Jabari, Barbara Voussen, Michael Enders, Shanthi Srinivasan, François Cossais, Thilo Wedel, Martina Boettner, Anna Schwarz, Linda Weyer, Oktay Göcer, Michael Schroeter, Mathias Maeurer, Matthias Woenckhaus, Karolin Pollok, Helena Radbruch, Luisa Klotz, Claus-Jürgen Scholz, Joachim Nickel, Andreas Friebe, Klaus Addicks, Süleyman Ergün, Paul V Lehmann, Stefanie Kuerten
Multiple sclerosis (MS) is a chronic autoimmune disease of the central nervous system (CNS) in young adults that has serious negative socioeconomic effects. In addition to symptoms caused by CNS pathology, the majority of MS patients frequently exhibit gastrointestinal dysfunction, which was previously either explained by the presence of spinal cord lesions or not directly linked to the autoimmune etiology of the disease. Here, we studied the enteric nervous system (ENS) in a B cell- and antibody-dependent mouse model of MS by immunohistochemistry and electron microscopy at different stages of the disease...
June 15, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28620589/transcriptomic-profiling-of-high-density-giardia-foci-encysting-in-the-murine-proximal-intestine
#15
Jonathan K Pham, Christopher Nosala, Erica Y Scott, Kristofer F Nguyen, Kari D Hagen, Hannah N Starcevich, Scott C Dawson
Giardia is a highly prevalent, understudied protistan parasite causing significant diarrheal disease worldwide. Its life cycle consists of two stages: infectious cysts ingested from contaminated food or water sources, and motile trophozoites that colonize and attach to the gut epithelium, later encysting to form new cysts that are excreted into the environment. Current understanding of parasite physiology in the host is largely inferred from transcriptomic studies using Giardia grown axenically or in co-culture with mammalian cell lines...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28620185/c-abl-regulates-gastrointestinal-muscularis-propria-homeostasis-via-erks
#16
Jinnan Xiang, Yiqun Zhang, Dandan Bao, Na Cao, Xin Zhang, Ping Li, Shoutao Qiu, Jigang Guo, Dan He, Baojie Li, Liqing Yao, Huijuan Liu
The gastrointestinal tract is responsible for food digestion and absorption. The muscularis propria propels the foodstuff through the GI tract and defects in intestine motility may cause obstruction disorders. Our present genetic studies identified non-receptor tyrosine kinase c-Abl as an important regulator of the muscularis propria homeostasis and a risk factor for rectal prolapse. Mouse deficient for c-Abl showed defects in the muscularis propria of gastrointestinal tract and older c-Abl (-/-) mice developed megaesophagus and rectal prolapse...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28615966/acute-physiological-and-electrical-accentuation-of-vagal-tone-has-no-effect-on-pain-or-gastrointestinal-motility-in-chronic-pancreatitis
#17
Jacob Juel, Christina Brock, Søren S Olesen, Adnan Madzak, Adam D Farmer, Qasim Aziz, Jens B Frøkjær, Asbjørn Mohr Drewes
BACKGROUND: The effective management of pain in chronic pancreatitis (CP) remains a therapeutic challenge. Analgesic drugs, such as opioids, and the underlying pathology can impair gut function. The autonomic nervous system influences hormone secretion and gut motility. In healthy volunteers, electrical (using noninvasive transcutaneous vagal nerve stimulation [t-VNS]) and physiological (using deep slow breathing [DSB]) modulation of parasympathetic tone results in pain attenuation and enhanced gut motility...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28615302/ccr2-dependent-monocyte-derived-macrophages-resolve-inflammation-and-restore-gut-motility-in-postoperative-ileus
#18
Giovanna Farro, Michelle Stakenborg, Pedro J Gomez-Pinilla, Evelien Labeeuw, Gera Goverse, Martina Di Giovangiulio, Nathalie Stakenborg, Elisa Meroni, Francesca D'Errico, Yvon Elkrim, Damya Laoui, Zofia M Lisowski, Kristin A Sauter, David A Hume, Jo A Van Ginderachter, Guy E Boeckxstaens, Gianluca Matteoli
OBJECTIVE: Postoperative ileus (POI) is assumed to result from myeloid cells infiltrating the intestinal muscularis externa (ME) in patients undergoing abdominal surgery. In the current study, we investigated the role of infiltrating monocytes in a murine model of intestinal manipulation (IM)-induced POI in order to clarify whether monocytes mediate tissue damage and intestinal dysfunction or they are rather involved in the recovery of gastrointestinal (GI) motility. DESIGN: IM was performed in mice with defective monocyte migration to tissues (C-C motif chemokine receptor 2, Ccr2(-/ (-)) mice) and wild-type (WT) mice to study the role of monocytes and monocyte-derived macrophages (MΦs) during onset and resolution of ME inflammation...
June 14, 2017: Gut
https://www.readbyqxmd.com/read/28611823/genetic-variability-as-a-regulator-of-tlr4-and-nod-signaling-in-response-to-bacterial-driven-dna-damage-response-ddr-and-inflammation-focus-on-the-gastrointestinal-gi-tract
#19
REVIEW
Evagelia Spanou, Polyxeni Kalisperati, Ioannis S Pateras, Alexandros Papalampros, Alexandra Barbouti, Athanasios G Tzioufas, Athanassios Kotsinas, Stavros Sougioultzis
The fundamental role of human Toll-like receptors (TLRs) and NOD-like receptors (NLRs), the two most studied pathogen recognition receptors (PRRs), is the protection against pathogens and excessive tissue injury. Recent evidence supports the association between TLR/NLR gene mutations and susceptibility to inflammatory, autoimmune, and malignant diseases. PRRs also interfere with several cellular processes, such as cell growth, apoptosis, cell proliferation, differentiation, autophagy, angiogenesis, cell motility and migration, and DNA repair mechanisms...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28610994/manganese-induced-sex-specific-gut-microbiome-perturbations-in-c57bl-6-mice
#20
Liang Chi, Bei Gao, Xiaoming Bian, Pengcheng Tu, Hongyu Ru, Kun Lu
Overexposure to manganese (Mn) leads to toxic effects, such as promoting the development of Parkinson's-like neurological disorders. The gut microbiome is deeply involved in immune development, host metabolism, and xenobiotics biotransformation, and significantly influences central nervous system (CNS) via the gut-brain axis, i.e. the biochemical signaling between the gastrointestinal tract and the CNS. However, it remains unclear whether Mn can affect the gut microbiome and its metabolic functions, particularly those linked to neurotoxicity...
June 10, 2017: Toxicology and Applied Pharmacology
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