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gastrointestinal pathophysiology

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https://www.readbyqxmd.com/read/28646338/chemotherapy-induced-gastrointestinal-toxicity-is-associated-with-changes-in-serum-and-urine-metabolome-and-fecal-microbiota-in-male-sprague-dawley-rats
#1
Richard A Forsgård, Vannina G Marrachelli, Katri Korpela, Rafael Frias, Maria Carmen Collado, Riitta Korpela, Daniel Monleon, Thomas Spillmann, Pia Österlund
PURPOSE: Chemotherapy-induced gastrointestinal toxicity (CIGT) is a complex process that involves multiple pathophysiological mechanisms. We have previously shown that commonly used chemotherapeutics 5-fluorouracil, oxaliplatin, and irinotecan damage the intestinal mucosa and increase intestinal permeability to iohexol. We hypothesized that CIGT is associated with alterations in fecal microbiota and metabolome. Our aim was to characterize these changes and examine how they relate to the severity of CIGT...
June 23, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28643285/skin-manifestations-of-inflammatory-bowel-disease
#2
REVIEW
Thomas Greuter, Alexander Navarini, Stephan R Vavricka
Inflammatory bowel disease (IBD) with its two main subtypes Crohn's disease and ulcerative colitis is not restricted to the gastrointestinal tract. Indeed, so-called extraintestinal manifestations (EIMs) are frequent and considerably affect morbidity and mortality. The prevalence of EIMs ranges from 6 to 47%. In up to one quarter of the patients, EIMs can present even before an IBD diagnosis is established. The pathophysiology of EIMs remains elusive, although data from clinical trials demonstrating anti-tumor necrosis factor (TNF) efficacy suggest a common pathogenic link between intestinal and extraintestinal disease activity...
June 23, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28643273/chronic-constipation-in-rome-iv-era-the-indian-perspective
#3
REVIEW
Uday C Ghoshal
Chronic constipation (CC) is a common problem in the community and in gastroenterology practice all over the world including India. After release of Rome IV guidelines in April 2016, there is increasing interest among gastroenterologists and physicians in India to look into special issues on CC in the Indian perspective. There are important differences in the bowel habit, definition, epidemiology, and pathophysiology including dietary factors and management of CC in India as compared to the West. As severity and frequency of abdominal pain, a symptom essential to diagnose constipation-predominant irritable bowel syndrome (IBS-C) rather than functional constipation (FC), is less common among Indian patients, FC is commoner than IBS-C in India...
June 23, 2017: Indian Journal of Gastroenterology: Official Journal of the Indian Society of Gastroenterology
https://www.readbyqxmd.com/read/28627413/modeling-esophagitis-using-human-three-dimensional-organotypic-culture-system
#4
Dorottya Laczkó, Fang Wang, F Bradley Johnson, Nirag Jhala, András Rosztóczy, Gregory G Ginsberg, Gary W Falk, Anil K Rustgi, John P Lynch
Esophagitis, whether caused by acid reflux, allergic responses, graft-versus-host disease, drugs, or infections, is a common condition of the gastrointestinal tract affecting nearly 20% of the US population. The instigating agent typically triggers an inflammatory response. The resulting inflammation is a risk factor for the development of esophageal strictures, Barrett esophagus, and esophageal adenocarcinoma. Research into the pathophysiology of these conditions has been limited by the availability of animal and human model systems...
June 13, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28626742/association-study-of-glutathione-s-transferases-gene-polymorphisms-gstm1-and-gstt1-with-ulcerative-colitis-and-crohn-s-disease-in-the-south-of-iran
#5
Maryam Moini, Mostafa Saadat, Hooshang Saadat, Atefeh Esmailnejad, Alireza Safarpour
BACKGROUND: Inflammatory bowel diseases (IBDs), including ulcerative colitis (UC) and Crohn's disease (CD), are chronic inflammatory disorders of the gastrointestinal tract. A combination of environmental factors and interactions with a genetic predisposition are suggested to play an important role in the etiology and pathogenesis of the IBD. Glutathione S-transferases (GSTs) are multifunctional enzymes involved in the cellular oxidative stress handling. Possible associations between GSTs gene polymorphisms and susceptibility to UC and CD have been reported in different population...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28623510/the-implication-of-neuronimmunoendocrine-nie-modulatory-network-in-the-pathophysiologic-process-of-parkinson-s-disease
#6
REVIEW
Yan Shen, Xingfang Guo, Chao Han, Fang Wan, Kai Ma, Shiyi Guo, Luxi Wang, Yun Xia, Ling Liu, Zhicheng Lin, Jinsha Huang, Nian Xiong, Tao Wang
Parkinson's disease (PD) is a progressive neurodegenerative disorder implicitly marked by the substantia nigra dopaminergic neuron degeneration and explicitly characterized by the motor and non-motor symptom complexes. Apart from the nigrostriatal dopamine depletion, the immune and endocrine study findings are also frequently reported, which, in fact, have helped to broaden the symptom spectrum and better explain the pathogenesis and progression of PD. Nevertheless, based on the neural, immune, and endocrine findings presented above, it is still difficult to fully recapitulate the pathophysiologic process of PD...
June 16, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28622812/clozapine-induced-gastrointestinal-hypomotility-a-potentially-life-threatening-adverse-event-a-review-of-the-literature
#7
REVIEW
Stephen West, David Rowbotham, Glen Xiong, Chris Kenedi
OBJECTIVE: The haematological and cardiac complications of clozapine have been well documented. Recent evidence from pharmacovigilance databases suggests that gastrointestinal (GI) complications are the leading cause of clozapine related deaths. This review aims to describe clinical features along with preventative and treatment options. METHOD: A review of MEDLINE via PubMed searching for all articles published up to February of 2016. Inclusion criteria were articles that provided clinical or epidemiological information relating to the diagnosis, outcome, management or pathophysiology of clozapine related gastrointestinal disorders in humans...
May 2017: General Hospital Psychiatry
https://www.readbyqxmd.com/read/28618973/from-clinical-uncertainties-to-precision-medicine-the-emerging-role-of-the-gut-barrier-and-microbiome-in-small-bowel-functional-diseases
#8
Wojciech Marlicz, Diana Yung, Karolina Skonieczna-Żydecka, Igor Loniewski, Saskia van Hemert, Beata Loniewska, Anastasios Koulaouzidis
Over the last decade, remarkable progress has been made in the understanding of disease pathophysiology. Many new theories expound on the importance of emerging factors such as microbiome influences, genomics/omics, stem cells, innate intestinal immunity or mucosal barrier complexities. This has introduced a further dimension of uncertainty into clinical decision-making, but equally, may shed some light on less well-understood and difficult to manage conditions. Areas covered: Comprehensive review of the literature on gut barrier and microbiome relevant to small bowel pathology...
June 16, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28616751/roles-of-amino-acids-in-preventing-and-treating-intestinal-diseases-recent-studies-with-pig-models
#9
REVIEW
Yulan Liu, Xiuying Wang, Yongqing Hou, Yulong Yin, Yinsheng Qiu, Guoyao Wu, Chien-An Andy Hu
Animal models are needed to study and understand a human complex disease. Because of their similarities in anatomy, structure, physiology, and pathophysiology, the pig has proven its usefulness in studying human gastrointestinal diseases, such as inflammatory bowel disease, ischemia/reperfusion injury, diarrhea, and cancer. To understand the pathogenesis of these diseases, a number of experimental models generated in pigs are available, for example, through surgical manipulation, chemical induction, microbial infection, and genetic engineering...
June 14, 2017: Amino Acids
https://www.readbyqxmd.com/read/28603431/hereditary-hemorrhagic-telangiectasia-and-pregnancy-potential-adverse-events-and-pregnancy-outcomes
#10
REVIEW
Omar Bari, Philip R Cohen
Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant condition with a prevalence of ~1 in 5,000 individuals. The pathophysiology of this condition centers on the lack of capillary beds between arterioles and venules, leading to direct contact between these vessels. This results in telangiectases on characteristic locations such as the face, fingers, mouth, and nasal mucosa. Visceral arteriovenous malformations (AVMs) are also observed in many patients, and these are most commonly seen in the brain, gastrointestinal tract, and lungs...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28593878/microbiota-abnormalities-and-the-therapeutic-potential-of-probiotics-in-the-treatment-of-mood-disorders
#11
Adiel C Rios, Pawan Kumar Maurya, Mariana Pedrini, Maiara Zeni-Graiff, Elson Asevedo, Rodrigo B Mansur, Andrea Wieck, Rodrigo Grassi-Oliveira, Roger S McIntyre, Mirian A F Hayashi, Elisa Brietzke
Major depressive disorder (MDD) and bipolar disorder (BD) are among the leading causes of burden and disability worldwide. Despite intensified research efforts to improve the treatment options and remission rates in mood disorders, no disease modifying treatment exists for these disorders. Accumulating evidence implicates the involvement of the gut microbiota in processes relevant to etiopathology of central nervous system-based disorders. The objective of this article was to critically evaluate the evidence supporting the link between gastrointestinal microbiota and mood disorders and to discuss the potential benefits of using probiotics in the treatment of MDD and BD...
May 8, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28592440/rome-foundation-asian-working-team-report-asian-functional-gastrointestinal-disorder-symptom-clusters
#12
Kewin Tien Ho Siah, Xiaorong Gong, Xi Jessie Yang, William E Whitehead, Minhu Chen, Xiaohua Hou, Nitesh Pratap, Uday C Ghoshal, Ari F Syam, Murdani Abdullah, Myung-Gyu Choi, Young-Tae Bak, Ching-Liang Lu, Sutep Gonlachanvit, Chua Seng Boon, Fan Fang, Pui Kuan Cheong, Justin C Y Wu, Kok-Ann Gwee
OBJECTIVE: Functional gastrointestinal disorders (FGIDs) are diagnosed by the presence of a characteristic set of symptoms. However, the current criteria-based diagnostic approach is to some extent subjective and largely derived from observations in English-speaking Western patients. We aimed to identify latent symptom clusters in Asian patients with FGID. DESIGN: 1805 consecutive unselected patients with FGID who presented for primary or secondary care to 11 centres across Asia completed a cultural and linguistic adaptation of the Rome III Diagnostic Questionnaire that was translated to the local languages...
June 7, 2017: Gut
https://www.readbyqxmd.com/read/28592308/examining-clinical-similarities-between-myalgic-encephalomyelitis-chronic-fatigue-syndrome-and-d-lactic-acidosis-a-systematic-review
#13
REVIEW
Amy Wallis, Michelle Ball, Sandra McKechnie, Henry Butt, Donald P Lewis, Dorothy Bruck
BACKGROUND: The pursuit for clarity in diagnostic and treatment pathways for the complex, chronic condition of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) continues. This systematic review raises a novel question to explore possible overlapping aetiology in two distinct conditions. Similar neurocognitive symptoms and evidence of D-lactate producing bacteria in ME/CFS raise questions about shared mechanisms with the acute condition of D-lactic acidosis (D-la). METHODS: D-la case reports published between 1965 and March 2016 were reviewed for episodes describing both neurological symptoms and high D-lactate levels...
June 7, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28587858/rebamipide-reduces-amyloid-%C3%AE-1-42-a%C3%AE-42-production-and-ameliorates-a%C3%AE-43-lowered-cell-viability-in-cultured-sh-sy5y-human-neuroblastoma-cells
#14
Kenta Fukui, Kazuma Yachi, Hidemi Yoshida, Kunikazu Tanji, Tomoh Matsumiya, Ryo Hayakari, Kazushi Tsuruga, Hiroshi Tanaka, Tadaatsu Imaizumi
Amyloid-beta (Aβ) peptides, Aβ 1-42 (Aβ42) and Aβ43, in particular, have been implicated in the pathophysiology of neurodegenerative disease such as Alzheimer's disease (AD). Rebamipide (REB), a gastrointestinal protective drug, can cross the blood-brain barrier after oral administration; however, the effects of REB on neuronal cells have not yet been reported. In this study, we investigated the effects of REB on Aβ43-induced cytotoxicity (monomers, 10μM) in cultured SH-SY5Y human neuroblastoma cells...
June 3, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28585346/ablation-of-tacr2-in-mice-leads-to-gastric-emptying-disturbance
#15
Y-L Mao, C-L Shen, T Zhou, B-T Ma, L-Y Tang, W-T Wu, H-X Zhang, H-L Lu, W-X Xu, Z-G Wang
BACKGROUND: Tacr2 is one of the G protein-coupled receptors(GPCRs) that mediate the biological actions of tachykinins. It is abundantly expressed in the gastrointestinal (GI) system and is thought to play an important role in GI motility, secretion, and visceral sensitivity. Previously, the physiological and pathophysiological functions of Tacr2 were mainly studied using Tacr2 selective agonists or antagonists. Here, we seek to investigate the effect of Tacr2 disruption in mice to provide further insights...
June 6, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28584525/gastrointestinal-motility-disorders-and-their-clinical-implications-in-cirrhosis
#16
REVIEW
Eleni Theocharidou, Ameet Dhar, David Patch
Gastrointestinal motility is impaired in a substantial proportion of patients with cirrhosis. Cirrhosis-related autonomic neuropathy, increased nitric oxide production, and gut hormonal changes have been implicated. Oesophageal dysmotility has been associated with increased frequency of abnormal gastro-oesophageal reflux. Impaired gastric emptying and accommodation may result in early satiety and may have an impact on the nutritional status of these patients. Small intestinal dysmotility might be implicated in small intestinal bacterial overgrowth and increased bacterial translocation...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28576435/-encapsulating-peritoneal-sclerosis
#17
Jean-Philippe Ryckelynck, Clémence Béchade, Nicolas Bouvier, Maxence Ficheux, Bruno Hurault de Ligny, Thierry Lobbedez
Encapsulating peritoneal sclerosis is a rare but devastating complication of long-term peritoneal dialysis with a high mortality rate. The incidence is between 0.5 and 2.5%, decreasing with time. PSE is defined as a clinical syndrome with signs of gastrointestinal obstruction, inflammation parameters, radiological and macroscopic changes. The duration of treatment and the cessation of peritoneal dialysis are the main risks. About 75% occured in patients on hemodialysis or after kidney transplantation. Morphological alterations are disappearance of mesothelial layer, submesothelial fibrosis, interstitial sclerosis and vasculopathy...
May 30, 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/28573751/early-weaning-stress-induces-chronic-functional-diarrhea-intestinal-barrier-defects-and-increased-mast-cell-activity-in-a-porcine-model-of-early-life-adversity
#18
C S Pohl, J E Medland, E Mackey, L L Edwards, K D Bagley, M P DeWilde, K J Williams, A J Moeser
BACKGROUND: Early life adversity (ELA) is a risk factor for development of gastrointestinal disorders later in life. The underlying mechanisms through which ELA and sex interact to influence disease susceptibility remains poorly understood. METHODS: Utilizing a porcine early weaning stress (EWS) model to mimic ELA, we investigated the long-term effects of EWS on functional diarrhea, ileal permeability, mast cell activity and mast cell relationship with enteric ganglia...
June 1, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28573065/celiac-disease-from-pathophysiology-to-treatment
#19
REVIEW
Ilaria Parzanese, Dorina Qehajaj, Federica Patrinicola, Merica Aralica, Maurizio Chiriva-Internati, Sanja Stifter, Luca Elli, Fabio Grizzi
Celiac disease, also known as "celiac sprue", is a chronic inflammatory disorder of the small intestine, produced by the ingestion of dietary gluten products in susceptible people. It is a multifactorial disease, including genetic and environmental factors. Environmental trigger is represented by gluten while the genetic predisposition has been identified in the major histocompatibility complex region. Celiac disease is not a rare disorder like previously thought, with a global prevalence around 1%. The reason of its under-recognition is mainly referable to the fact that about half of affected people do not have the classic gastrointestinal symptoms, but they present nonspecific manifestations of nutritional deficiency or have no symptoms at all...
May 15, 2017: World Journal of Gastrointestinal Pathophysiology
https://www.readbyqxmd.com/read/28571196/addison-s-disease-mimicking-as-acute-pancreatitis-a-case-report
#20
Sayani Chaudhuri, Karthik N Rao, Navin Patil, Balaji Ommurugan, George Varghese
Over past two decades there has been significant improvement in medical field in elucidating the underlying pathophysiology and genetics of Addison's disease. Adrenal insufficiency (Addison's disease) is a rare disease with an incidence of 0.8/100,000 cases. The diagnosis may be delayed if the clinical presentation mimics a gastrointestinal disorder or psychiatric illness. We report a case of Addison's disease presenting as acute pain in abdomen mimicking clinical presentation of acute pancreatitis.
April 2017: Journal of Clinical and Diagnostic Research: JCDR
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