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gastrointestinal pathophysiology

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https://www.readbyqxmd.com/read/28526435/the-bidirectional-gut-brain-microbiota-axis-as-a-potential-nexus-between-traumatic-brain-injury-inflammation-and-disease
#1
Mark H Sundman, Nan-Kuei Chen, Vignesh Subbian, Ying-Hui Chou
As head injuries and their sequelae have become an increasingly salient matter of public health, experts in the field have made great progress elucidating the biological processes occurring within the brain at the moment of injury and throughout the recovery thereafter. Given the extraordinary rate at which our collective knowledge of neurotrauma has grown, new insights may be revealed by examining the existing literature across disciplines with a new perspective. This article will aim to expand the scope of this rapidly evolving field of research beyond the confines of the central nervous system (CNS)...
May 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28526277/gene-expression-patterns-in-distinct-endoscopic-findings-for-eosinophilic-gastritis-in-children
#2
Masamichi Sato, Tetsuo Shoda, Hirotaka Shimizu, Kanami Orihara, Kyoko Futamura, Akio Matsuda, Yoshiyuki Yamada, Rie Irie, Takako Yoshioka, Toshiaki Shimizu, Yukihiro Ohya, Ichiro Nomura, Kenji Matsumoto, Katsuhiro Arai
BACKGROUND: Eosinophilic gastritis (EG) is clinicopathologically characterized by both marked gastric eosinophilia and clinical symptoms. The endoscopic findings in EG vary among patients, leading to clinical confusion. However, little is known about the relationship between precise endoscopic findings and the pathophysiological process responsible for EG. OBJECTIVE: We aimed to elucidate whether the gross endoscopic findings of EG can be classified into distinct gene expression profiles...
May 16, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28522958/coexistence-of-ulcerative-colitis-and-sj%C3%A3-gren-s-syndrome-in-a-patient-with-takayasu-s-arteritis-and-hashimoto-s-thyroiditis
#3
Hyun Woo Park, Hyun Seok Lee, Sejin Hwang, Han Sol Lee, Han-Ik Bae, Ghilsuk Yoon
A 31-year-old woman with a 15-year history of Takayasu's arteritis (TA) and a 13-year history of Hashimoto's thyroiditis presented with hematochezia. She received a diagnosis of Sjögren's syndrome at 1 month before her visit to Kyungpook National University Medical Center. Her colonoscopic findings were compatible with a diagnosis of ulcerative colitis (UC). She was treated with oral mesalazine, and her hematochezia symptoms subsequently disappeared. The coexistence of UC and TA has been reported; however, reports on the coexistence of UC and Sjögren's syndrome, or of UC and Hashimoto's thyroiditis are rare...
April 2017: Intestinal Research
https://www.readbyqxmd.com/read/28520327/-importance-of-stopping-some-medications-in-case-of-gastrointestinal-disturbances-leading-to-dehydration
#4
REVIEW
J-M Krzesinski, A J Scheen
This clinical case draws attention to the importance of stopping some medications in case of gastrointestinal disturbances that could induce dehydration. The latter can provoke an acute renal failure, which may lead to a toxic accumulation of these pharmacological agents and/or increase their nephrotoxicity. This may induce a vicious circle that is potentially dangerous and even fatal. Three pharmacological classes that are widely used in clinical practice are considered as examples, metformin, inhibitors of the renin-angiotensin system and nonsteroidal anti-inflammatory drugs...
May 2017: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28519244/neonatal-abstinence-syndrome-update-on-diagnostic-and-therapeutic-strategies
#5
Genny Raffaeli, Giacomo Cavallaro, K Karel Allegaert, Enno Diederik Wildschut, Monica Fumagalli, Massimo Agosti, Dick Tibboel, Fabio Mosca
Substance use among pregnant women is a major public health issue. Both prescription opioid use and illicit opioid abuse have increased dramatically in recent years. Prolonged in utero drug exposure may result in neonatal abstinence syndrome (NAS), an acute multisystemic clinical entity that occurs in the first days of life. This syndrome is caused by abrupt discontinuation of fetal exposure to licit or illicit drugs chronically consumed by the mother during pregnancy and transmitted to the fetus through the placenta...
May 18, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28516248/environmental-toxicants-incidence-of-degenerative-diseases-and-therapies-from-the-epigenetic-point-of-view
#6
REVIEW
Mahshid Hodjat, Soheila Rahmani, Fazlullah Khan, Kamal Niaz, Mona Navaei-Nigjeh, Solmaz Mohammadi Nejad, Mohammad Abdollahi
Epigenotoxicology is an emerging field of study that investigates the non-genotoxic epigenetic effects of environmental toxicants resulting in alteration of normal gene expression and disruption of cell function. Recent findings on the role of toxicant-induced epigenetic modifications in the development of degenerative diseases have opened up a promising research direction to explore epigenetic therapy approaches and related prognostic biomarkers. In this review, we presented comprehensive data on epigenetic alterations identified in various diseases, including cancer, autoimmune disorders, pulmonary conditions as well as cardiovascular, gastrointestinal and bone disease...
May 17, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28513822/abdominal-pressure-and-gastrointestinal-function-an-inseparable-couple
#7
Annika Reintam Blaser, Manu Lng Malbrain, Adrian Regli
Evaluating the degree of organ dysfunction is a cornerstone in distinguishing patients with critical illness from those without. However, evaluation of the gastrointestinal (GI) function in critically ill patients is not unified, and is still largely based on subjective clinical evaluation. Intra-abdominal pressure (IAP) has been proposed as a parameter to facilitate monitoring of abdominal compartment in critical illness, but the interactions between IAP and GI function are poorly clarified.The aim of this current review is to describe interactions and associations between GI dysfunction and IAP from a pathophysiological and clinical point of view...
May 17, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28502440/motility-disorders-in-children
#8
REVIEW
Samuel Nurko
Gastrointestinal motility disorders in the pediatric population are common and can range from benign processes to more serious disorders. Performing and interpreting motility evaluations in children present unique challenges. There are primary motility disorders but abnormal motility may be secondary due to other disease processes. Diagnostic studies include radiographic scintigraphic and manometry studies. Although recent advances in the genetics, biology, and technical aspects are having an important impact and have allowed for a better understanding of the pathophysiology and therapy for gastrointestinal motility disorders in children, further research is needed to be done to have better understanding of the pathophysiology and for better therapies...
June 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28489843/-non-cirrhotic-portal-hypertension-due-to-didanosina-a-rare-case
#9
María T Gamero, María Susana Gallardo, Víctor Aguilar, Eduar Bravo, Julissa Guevara, Fernando Mejia
Liver involvement is usually seen in patients infected with the human immunodeficiency virus (HIV), especially in patients coinfected with hepatitis B or C, in alcohol abuse, etc. However, there is a group of patients who develop liver involvement and portal hypertension of unspecified cause. Non-cirrhotic portal hypertension (NCPH) is a liver disorder recently described, but potentially serious. It has been reported in HIV-infected patients with highly active antiretroviral therapy (HAART), specifically didanosine (DDI)...
January 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28488235/emulating-host-microbiome-ecosystem-of-human-gastrointestinal-tract-in-vitro
#10
Gun-Seok Park, Min Hee Park, Woojung Shin, Connie Zhao, Sameer Sheikh, So Jung Oh, Hyun Jung Kim
The human gut microbiome performs prodigious physiological functions such as production of microbial metabolites, modulation of nutrient digestion and drug metabolism, control of immune system, and prevention of infection. Paradoxically, gut microbiome can also negatively orchestrate the host responses in diseases or chronic disorders, suggesting that the regulated and balanced host-gut microbiome crosstalk is a salient prerequisite in gastrointestinal physiology. To understand the pathophysiological role of host-microbiome crosstalk, it is critical to recreate in vivo relevant models of the host-gut microbiome ecosystem in human...
May 10, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28481310/effects-of-melatonin-and-its-analogues-on-pancreatic-inflammation-enzyme-secretion-and-tumorigenesis
#11
REVIEW
Jolanta Jaworek, Anna Leja-Szpak, Katarzyna Nawrot-Porąbka, Joanna Szklarczyk, Michalina Kot, Piotr Pierzchalski, Marta Góralska, Piotr Ceranowicz, Zygmunt Warzecha, Artur Dembinski, Joanna Bonior
Melatonin is an indoleamine produced from the amino acid l-tryptophan, whereas metabolites of melatonin are known as kynuramines. One of the best-known kynuramines is N¹-acetyl-N¹-formyl-5-methoxykynuramine (AFMK). Melatonin has attracted scientific attention as a potent antioxidant and protector of tissue against oxidative stress. l-Tryptophan and kynuramines share common beneficial features with melatonin. Melatonin was originally discovered as a pineal product, has been detected in the gastrointestinal tract, and its receptors have been identified in the pancreas...
May 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28469850/zoledronic-acid-for-neonatal-subcutaneous-fat-necrosis
#12
Jeremy A Di Bari, Jennifer A Nead, Scott J Schurman
Subcutaneous fat necrosis (SFN) in infants producing severe hypercalcemia is a life-threatening emergency. Pathophysiology may include enhanced gastrointestinal calcium absorption and bone resorption. We treated an infant with SFN and serum calcium of 15 mg/dL with prednisolone and low-dose zoledronic acid. Serum calcium promptly normalized without rebound hypocalcemia, and redosing of zoledronic acid was not necessary.
May 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28465689/reversible-inferolateral-st-segment-elevation-associated-with-small-bowel-obstruction
#13
Ankit Upadhyay, Sudheer Chauhan, Umair Jangda, Vipul Bodar, Ahmed Al-Chalabi
ST-segment elevation is an important and alarming electrocardiographic sign that necessitates immediate attention but does not always indicate that the primary pathology is cardiac in origin. It needs to be interpreted in the clinical context as several pathological conditions involving especially gastrointestinal tract may lead to delayed diagnosis and treatment as well as complications from invasive unnecessary interventions. We present two patients, a 64-year-old male and a 71-year-old female, who were admitted to the emergency room of a community-based hospital with similar complaints of worsening epigastric abdominal pain and were diagnosed later with small bowel obstruction...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28462704/the-role-of-dietary-approach-in-irritable-bowel-syndrome
#14
Piero Portincasa, Antony Lembo, Ornella De Bari, Domenica M Di Palo, Anna Maggio, Ilaria Cataldo, Giuseppe Calamita
Irritable bowel syndrome (IBS) is a chronic functional disorder of the gastrointestinal tract and is one of the most frequent gastrointestinal diseases. In IBS multiple pathophysiological mechanisms including alterations in intestinal motility, permeability, nutrient absorption, and intestinal microbiota have been implicated. Foods are commonly reported by patients to be a trigger of symptoms and therefore are likely involved in the generation of symptoms in IBS. Among all possible therapeutic options, a first-line approach to IBS is dietary education and identification of foods potentially responsible for the onset or worsening of symptoms...
April 27, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28462376/regulation-of-gastric-metaplasia-dysplasia-and-neoplasia-by-bone-morphogenetic-protein-signaling
#15
REVIEW
Andrea Todisco
The bone morphogenetic proteins, (BMP)s are regulatory peptides that have significant effects on the growth and differentiation of gastrointestinal tissues. In addition, the BMPs have been shown to exert anti-inflammatory actions in the gut and to negatively regulate the growth of gastric neoplasms. The role of BMP signaling in the regulation of gastric metaplasia, dysplasia and neoplasia has been poorly characterized. Transgenic expression in the mouse stomach of the BMP inhibitor noggin leads to decreased parietal cell number, increased epithelial cell proliferation, and to the emergence of SPEM...
May 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28458594/hepatic-lesions-that-mimic-metastasis-on-radiological-imaging-during-chemotherapy-for-gastrointestinal-malignancy-recent-updates
#16
REVIEW
Sung-Hye You, Beom Jin Park, Yeul Hong Kim
During chemotherapy in patients with gastrointestinal malignancy, the hepatic lesions may occur as chemotherapy-induced lesions or tumor-associated lesions, with exceptions for infectious conditions and other incidentalomas. Focal hepatic lesions arising from chemotherapy-induced hepatopathies (such as chemotherapy-induced sinusoidal injury and steatosis) and tumor-associated eosinophilic abscess should be considered a mimicker of metastasis in patients with gastrointestinal malignancy. Accumulating evidence suggests that chemotherapy for gastrointestinal malignancy in the liver has roles in both the therapeutic effects for hepatic metastasis and injury to the non-tumor bearing hepatic parenchyma...
May 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28454890/plasticity-of-vagal-afferent-signaling-in-the-gut
#17
REVIEW
Gintautas Grabauskas, Chung Owyang
Vagal sensory neurons mediate the vago-vagal reflex which, in turn, regulates a wide array of gastrointestinal functions including esophageal motility, gastric accommodation and pancreatic enzyme secretion. These neurons also transmit sensory information from the gut to the central nervous system, which then mediates the sensations of nausea, fullness and satiety. Recent research indicates that vagal afferent neurons process non-uniform properties and a significant degree of plasticity. These properties are important to ensure that vagally regulated gastrointestinal functions respond rapidly and appropriately to various intrinsic and extrinsic factors...
April 10, 2017: Medicina
https://www.readbyqxmd.com/read/28452565/administration-of-wasabia-koreana-ameliorates-irritable-bowel-syndrome-like-symptoms-in-a-zymosan-induced-mouse-model
#18
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/28451914/assessment-of-anti-vinculin-and-anti-cytolethal-distending-toxin-b-antibodies-in-subtypes-of-irritable-bowel-syndrome
#19
Ali Rezaie, Sung Chul Park, Walter Morales, Emily Marsh, Anthony Lembo, Jae Hak Kim, Stacy Weitsman, Kathleen S Chua, Gillian M Barlow, Mark Pimentel
BACKGROUND: Antibodies to cytolethal distending toxin B (CdtB) and vinculin are novel biomarkers that rule-in and differentiate irritable bowel syndrome with diarrhea (IBS-D) from other causes of diarrhea and healthy controls. AIM: To determine whether these antibodies can also diagnose and differentiate other IBS subtypes. METHODS: Subjects with IBS-D based on Rome III criteria (n = 2375) were recruited from a large-scale multicenter clinical trial (TARGET 3)...
April 27, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28447569/a-new-treatment-strategy-for-parkinson-s-disease-through-the-gut-brain-axis-the-glucagon-like-peptide-1-receptor-pathway
#20
Dong Seok Kim, Ho-Il Choi, Yun Wang, Yu Luo, Barry J Hoffer, Nigel H Greig
Molecular communications in the gut-brain axis, between the central nervous system and the gastrointestinal tract, arecritical for maintaining healthy brain function particularly in aging. Epidemiological analyses indicate type 2 diabetes mellitus (T2DM) is a risk factor for neurodegenerative disorders, including Alzheimer's disease (AD) and Parkinson's diseases (PD) for which aging shows a major correlative association. Common pathophysiological features exist between T2DM, AD and PD, including oxidative stress, inflammation, insulin resistance, abnormal protein processing and cognitive decline, and suggest that effective drugs for T2DM that positively impact the gut-brain axis could provide an effective treatment option for neurodegenerative diseases...
April 26, 2017: Cell Transplantation
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