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https://www.readbyqxmd.com/read/28550056/biofilm-formation-potential-of-heat-resistant-escherichia-coli-dairy-isolates-and-complete-genome-of-mdr-heat-resistant-strain-fam21845
#1
Roger Marti, Michael Schmid, Sandra Kulli, Kerstin Schneeberger, Javorka Naskova, Susanne Knøchel, Christian H Ahrens, Jörg Hummerjohann
We tested the biofilm formation potential of 30 heat resistant and six heat sensitive E. coli dairy isolates. The production of curli and cellulose, static biofilm formation on polystyrene (PS) and stainless steel, formation of biofilm under dynamic conditions (Bioflux), and initial adhesion rates (IAR) were evaluated. Biofilm formation varied greatly between strains, media and assay. Our results highlight the importance of the experimental setup to determine biofilm formation under conditions of interest, as correlation between different assays was often not given...
May 26, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28550025/mineralocorticoid-receptor-null-mice-informing-cell-type-specific-roles
#2
Timothy James Cole, Morag Young
The mineralocorticoid receptor (MR) mediates the actions of two important adrenal corticosteroid hormones, aldosterone and cortisol. The cell signalling roles of the MR in vivo have expanded enormously since the cloning of human MR gene 30 years ago and the first MR gene knockout in mice nearly 20 years ago. Complete ablation of the MR revealed important roles postnatally for regulation of kidney epithelial functions, with MR-null mice dying 1-2 weeks postnatally from renal salt wasting and hyperkalaemia, with elevated plasma renin and aldosterone...
May 26, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28549787/the-gut-brain-axis-in-parkinson-s-disease-possibilities-for-food-based-therapies
#3
Paula Perez-Pardo, Tessa Kliest, Hemraj B Dodiya, Laus M Broersen, Johan Garssen, Ali Keshavarzian, Aletta D Kraneveld
Parkinson's disease (PD) is usually characterized by cardinal motor impairments. However, a range of non-motor symptoms precede the motor-phase and are major determinants for the quality of life. To date, no disease modifying treatment is available for PD patients. The gold standard therapy of levodopa is based on restoring dopaminergic neurotransmission, thereby alleviating motor symptoms, whereas non-motor symptoms remain undertreated. One of the most common non-motor symptoms is gastrointestinal dysfunction usually associated with alpha-synuclein accumulations and low-grade mucosal inflammation in the enteric nervous system...
May 23, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28548906/beyond-the-bowel-extraintestinal-manifestations-of-inflammatory-bowel-disease
#4
Jeffrey D Olpin, Brett P Sjoberg, Sarah E Stilwill, Leif E Jensen, Maryam Rezvani, Akram M Shaaban
Inflammatory bowel disease (IBD) is a chronic, relapsing immune-mediated inflammation of the gastrointestinal tract. IBD includes two major disease entities: Crohn disease and ulcerative colitis. Imaging plays an important role in the diagnosis and surveillance of these complex disorders. Computed tomographic and magnetic resonance enterographic techniques have been refined in recent years to provide a superb means of evaluating the gastrointestinal tract for suspected IBD. Although the intestinal imaging manifestations of IBD have been extensively discussed in the radiology literature, extraintestinal imaging manifestations of IBD have received less attention...
May 26, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28548289/effects-of-food-borne-nanomaterials-on-gastrointestinal-tissues-and-microbiota
#5
REVIEW
Hans Bouwmeester, Meike van der Zande, Mark A Jepson
Ingestion of engineered nanomaterials is inevitable due to their addition to food and prevalence in food packaging and domestic products such as toothpaste and sun cream. In the absence of robust dosimetry and particokinetic data, it is currently challenging to accurately assess the potential toxicity of food-borne nanomaterials. Herein, we review current understanding of gastrointestinal uptake mechanisms, consider some data on the potential for toxicity of the most commonly encountered classes of food-borne nanomaterials (including TiO2 , SiO2, ZnO, and Ag nanoparticles), and discuss the potential impact of the luminal environment on nanoparticle properties and toxicity...
May 26, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28547857/confocal-endomicroscopy-in-diagnosis-of-intestinal-chronic-graft-versus-host-disease
#6
Kathrin Rieger, Ute Günther, Ulrike Erben, Anja Kühl, Christoph Loddenkemper, Antonio Pezzutto, Britta Siegmund, Christian Bojarski
Graft-versus-host disease (GvHD) is a major complication of allogeneic stem cell transplantation. High-resolution in vivo histology of the intestine by confocal endomicroscopy (CEM) detects acute GvHD (aGvHD) with high sensitivity. This pilot study aims to evaluate the diagnostic value of CEM for intestinal chronic GvHD (cGvHD). The study included 20 patients with gastrointestinal symptoms and confirmed cGvHD in other organs as well as 20 patients with clinically suspected acute GvHD for control. Confocal endomicroscopy was performed as gastroscopy followed by sigmoidoscopy after intravenous injection of fluorescein (10%) and topical application of acriflavine (0...
May 25, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28547657/compartmentalized-expression-patterns-of-pancreatic-and-gastric-related-genes-in-the-alimentary-canal-of-the-ascidian-ciona-intestinalis-evolutionary-insights-into-the-functional-regionality-of-the-gastrointestinal-tract-in-olfactores
#7
Satoshi Nakayama, Michio Ogasawara
Many heterotrophic animals have a one-way alimentary canal that is essential for their nutrition and sequential steps of the digestive system, namely ingestion, digestion, absorption and elimination, are widely shared among bilaterians. Morphological, functional and molecular knowledge of the alimentary canal has been obtained in particular from mammalian research but the shared features and evolution of these aspects of the highly diverged alimentary canal in the animal kingdom are still unclear. We therefore investigate spatial gene expression patterns of pancreatic- and gastric-related molecules of ascidians (a sister group of vertebrates) with special reference to the functional regionality of the gastrointestinal tract...
May 25, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28547631/management-of-diverticulitis-in-2017
#8
Sarah E Deery, Richard A Hodin
Diverticulitis has become increasingly more common in the 20(th) century and is now one of the most frequent indications for gastrointestinal tract-related hospitalizations. The spectrum of clinical presentation can vary widely from mild, uncomplicated disease that can be managed as an outpatient, to complicated diverticulitis with peritonitis and sepsis. Historically, all patients with diverticulitis were managed with, at a minimum, a course of antibiotics, with many patients undergoing urgent or emergent surgery with a sigmoid colectomy, end colostomy, and oversewn rectosigmoid "Hartmann's" stump...
May 25, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28547076/purinergic-signaling-during-intestinal-inflammation
#9
REVIEW
Maria Serena Longhi, Alan Moss, Zhenghui Gordon Jiang, Simon C Robson
Inflammatory bowel disease (IBD) is a devastating disease that is associated with excessive inflammation in the intestinal tract in genetically susceptible individuals and potentially triggered by microbial dysbiosis. This illness markedly predisposes patients to thrombophilia and chronic debility as well as bowel, lymphatic, and liver cancers. Development of new therapies is needed to re-establish long-term immune tolerance in IBD patients without increasing the risk of opportunistic infections and cancer...
May 26, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28546722/malignant-peripheral-nerve-sheath-tumour-of-the-small-bowel-presenting-with-intussusception-and-perforation-a-double-jeopardy
#10
Ananth P Abraham, Joshua Franklyn, Jagan Chandramohan, Pranay Gaikwad, John C Muthusami
Malignant peripheral nerve sheath tumours (MPNST) are rare soft tissue sarcomas which largely occur in the extremities and the head and neck region. The tumours are aggressive with a high rate of recurrence. Radical surgical resection remains the treatment of choice with adjuvant radiation therapy and chemotherapy still failing to demonstrate a clear benefit. The gastrointestinal tract is an exceedingly rare site for these tumours. We report an unusual case of a young male with an MPNST of the small bowel who presented with an ileocolic intussusception and sigmoid perforation...
June 2017: Indian Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28546425/the-first-crystal-structure-of-a-family-129-glycoside-hydrolase-from-a-probiotic-bacterium-reveals-critical-residues-and-metal-co-factors
#11
Mayo Sato, Dorothee Liebschner, Yusuke Yamada, Naohiro Matsugaki, Takatoshi Arakawa, Siobhan S Wills, Mitchell Hattie, Keith A Stubbs, Tasuku Ito, Toshiya Senda, Hisashi Ashida, Shinya Fushinobu
The α-N-acetylgalactosaminidase from the probiotic bacterium Bifidobacterium bifidum (NagBb) belongs to the glycoside hydrolase (GH) family 129 and hydrolyzes the glycosidic bond of Tn antigen (GalNAcα1-Ser/Thr). NagBb is involved in assimilation of O-glycans on mucin glycoproteins by B. bifidum in the human gastrointestinal tract, but its catalytic mechanism has remained elusive because of a lack of sequence homology around putative catalytic residues and of other structural information. Here we report the X-ray crystal structure of NagBb, representing the first GH129 family structure, solved by the single-wavelength anomalous dispersion method based on sulfur atoms of the native protein...
May 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28545917/comparison-of-oral-antibiotic-failure-rates-in-post-roux-en-y-gastric-bypass-patients-versus-controls
#12
David J Roy, Diana R Langworthy, Kristina M Thurber, Paul A Lorentz, Ross A Dierkhising, Manpreet S Mundi
BACKGROUND: Due to the malabsorptive nature of the Roux-en-Y gastric bypass (RYGB), there is a potential for impaired absorption of oral medications. Clinical outcomes of patients who receive oral antibiotics after RYGB have not been adequately described in the literature. OBJECTIVES: The primary objective was composite therapeutic failure. Secondary objectives included comparing failure rates between antibiotic classes and at various time points since RYGB. SETTING: University hospital, United States...
March 29, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28545907/impact-of-chemotherapy-on-gastrointestinal-functions-and-the-enteric-nervous-system
#13
REVIEW
Jonathan Escalante, Rachel M McQuade, Vanesa Stojanovska, Kulmira Nurgali
Chemotherapy is the main treatment for many cancers, including colorectal cancer, a type of cancer with some of the highest prevalence and mortality rates worldwide. Although chemotherapeutic drugs have greatly improved the survival rates of cancer patients, there are many side-effects associated with their use. The gastrointestinal side-effects of chemotherapy often lead to dose reduction or even discontinuation of treatment, which in turn affects the clinical outcome. Gastrointestinal side-effects, such as chemotherapy-induced diarrhea and constipation, may persist many years after treatment, greatly reducing quality of life...
May 10, 2017: Maturitas
https://www.readbyqxmd.com/read/28545838/strategies-for-targeted-drug-delivery-in-treatment-of-colon-cancer-current-trends-and-future-perspectives
#14
REVIEW
Antara Banerjee, Surajit Pathak, Vimala Devi S, Dharani Vasan, Ramachandran Murugesan, Rama S Verma
Despite advances in treatment modalities, colon cancer (CC) is the third most common cause of cancer-related death worldwide. Subsequent unfavorable effects owing to toxicity of conventional drugs are a challenging problem associated with chemotherapy. There is noticeable concern toward site-specific/targeted delivery of chemotherapeutic drugs specifically to the affected site of the colon in a predictable and reproducible manner. However, the biggest challenge in successful drug targeting for the colon is avoidance of drug absorption and/or degradation in the upper gastrointestinal tract before the drug reaches the colon...
May 22, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28545504/a-case-report-of-zinc-phosphide-poisoning-complicated-by-acute-renal-failure-and-tubulo-interstitial-nephritis
#15
Nilukshana Yogendranathan, H M M T B Herath, Thenuka Sivasundaram, R Constantine, Aruna Kulatunga
BACKGROUND: Run Rat® is a rodenticide widely used against small mammals. It comprises of a minimum of 32% zinc phosphide which is highly toxic in acute exposures to humans. It may be consumed accidentally or intentionally. It enters the body via skin, respiratory and gastrointestinal tracts. Zinc phosphide is hydrolyzed by the gastric acid and is transformed into phosphine gas. Phosphine is a respiratory toxin that inhibits cytochrome C oxidase system resulting in renal failure and liver failure...
May 25, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28545061/microbiota-induced-peritrophic-matrix-regulates-midgut-homeostasis-and-prevents-systemic-infection-of-malaria-vector-mosquitoes
#16
Faye H Rodgers, Mathilde Gendrin, Claudia A S Wyer, George K Christophides
Manipulation of the mosquito gut microbiota can lay the foundations for novel methods for disease transmission control. Mosquito blood feeding triggers a significant, transient increase of the gut microbiota, but little is known about the mechanisms by which the mosquito controls this bacterial growth whilst limiting inflammation of the gut epithelium. Here, we investigate the gut epithelial response to the changing microbiota load upon blood feeding in the malaria vector Anopheles coluzzii. We show that the synthesis and integrity of the peritrophic matrix, which physically separates the gut epithelium from its luminal contents, is microbiota dependent...
May 17, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28545056/effect-of-helicobacter-pylori-infection-on-the-link-between-glp-1-expression-and-motility-of-the-gastrointestinal-tract
#17
Hirotsugu Eda, Hirokazu Fukui, Ryosuke Uchiyama, Yoshitaka Kitayama, Ken Hara, Mo Yang, Mio Kodani, Toshihiko Tomita, Tadayuki Oshima, Jiro Watari, Hiroko Tsutsui, Hiroto Miwa
BACKGROUND: Although Helicobacter pylori (H. pylori) infection is closely associated with the development of peptic ulcer, its involvement in pathophysiology in the lower intestinal tract and gastrointestinal (GI) motility remains unclear. Glucagon-like peptide-1 (GLP-1) is a gut hormone produced in the lower intestinal tract and involved in GI motility. Here, we investigated the effect of H. pylori infection on the link between GLP-1 expression and motility of the GI tract. METHODS: C57BL/6 mice were inoculated with a H...
2017: PloS One
https://www.readbyqxmd.com/read/28544521/oral-nucleic-acid-therapy-using-multicompartmental-delivery-systems
#18
REVIEW
Husain Attarwala, Murui Han, Jonghan Kim, Mansoor Amiji
Nucleic acid-based therapeutics has the potential for treating numerous diseases by correcting abnormal expression of specific genes. Lack of safe and efficacious delivery strategies poses a major obstacle limiting clinical advancement of nucleic acid therapeutics. Oral route of drug administration has greater delivery challenges, because the administered genes or oligonucleotides have to bypass degrading environment of the gastrointestinal (GI) tract in addition to overcoming other cellular barriers preventing nucleic acid delivery...
May 24, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28544091/a-new-predictive-model-for-acute-gastrointestinal-bleeding-in-patients-taking-oral-anticoagulants-a-cohort-study
#19
Akira Shimomura, Naoyoshi Nagata, Takuro Shimbo, Toshiyuki Sakurai, Shiori Moriyasu, Hidetaka Okubo, Kazuhiro Watanabe, Chizu Yokoi, Junichi Akiyama, Naomi Uemura
BACKGROUND: We developed a predictive model of long-term gastrointestinal (GI) bleeding risk in patients receiving oral anticoagulants and compared it with the HAS-BLED score. METHODS: We periodically followed a cohort of 508 patients taking oral anticoagulants (66 direct oral anticoagulants users and 442 warfarin users). Absence of GI bleeding at an initial examination, and any subsequent GI bleeding, were confirmed endoscopically. The bleeding model was developed by multivariate survival analysis and evaluated by Harrell's c-index...
May 19, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28543805/mucoepidermoid-carcinoma-of-the-transverse-colon-a-rare-tumor-entity-with-literature-review
#20
Fei Han, Hong Jiang, Suxia Zhang
Mucoepidermoid carcinoma of the gastrointestinal tract is a rare entity. Here, we report a case of mucoepidermoid carcinoma of the transverse colon in a 77-year-old woman who presented with a 2-month history of epigastrium pain, diarrhea and melena. A giant tumor with apparently invading gallbladder was found by enhanced CT scan, then the extended resection of transverse colon was performed for the patient 2 weeks later. Microscopically, the tumor was composed of solid nests of epidermoid and Periodic Acid-Schiff (PAS)-positive mucin-producing cells with desmoplastic stroma...
May 24, 2017: Pathology International
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