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https://www.readbyqxmd.com/read/28718816/complex-dna-damage-a-route-to-radiation-induced-genomic-instability-and-carcinogenesis
#1
REVIEW
Ifigeneia V Mavragani, Zacharenia Nikitaki, Maria P Souli, Asef Aziz, Somaira Nowsheen, Khaled Aziz, Emmy Rogakou, Alexandros G Georgakilas
Cellular effects of ionizing radiation (IR) are of great variety and level, but they are mainly damaging since radiation can perturb all important components of the cell, from the membrane to the nucleus, due to alteration of different biological molecules ranging from lipids to proteins or DNA. Regarding DNA damage, which is the main focus of this review, as well as its repair, all current knowledge indicates that IR-induced DNA damage is always more complex than the corresponding endogenous damage resulting from endogenous oxidative stress...
July 18, 2017: Cancers
https://www.readbyqxmd.com/read/28718031/newcomers-in-paediatric-gi-pathology-childhood-enteropathies-including-very-early-onset-monogenic-ibd
#2
Arzu Ensari, Judith Kelsen, Pierre Russo
Childhood enteropathies are a group of diseases causing severe chronic (>2-3 weeks) diarrhoea often starting in the first week of life with the potential for fatal complications for the affected infant. Early identification and accurate classification of childhood enteropathies are, therefore, crucial for making treatment decisions to prevent life-threatening complications. Childhood enteropathies are classified into four groups based on the underlying pathology: (i) conditions related to defective digestion, absorption and transport of nutrients and electrolytes; (ii) disorders related to enterocyte differentiation and polarization; (iii) defects of enteroendocrine cell differentiation; and (iv) disorders associated with defective modulation of intestinal immune response...
July 17, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28707966/targeted-molecular-ablation-of-cancer-stem-cells-for-curing-gastrointestinal-cancers
#3
Yong Seok Kim, Ho Jae Lee, Jong-Min Park, Young-Min Han, Napapan Kangwan, Ji Young Oh, Dong Yoon Lee, Ki Baik Hahm
Abundance of the ATPase-binding cassette (ABC) transporters and deranged self-renewal pathways characterize the presence of cancer stem cells (CSCs) in gastrointestinal cancers (GI cancers), which play crucial roles in tumorigenesis, chemotherapy resistance, tumor recurrence, and cancer metastasis. Therefore, in order to ensure high cure rates, chemoquiescence, CSCs should be ablated. Recent advances in either understanding CSCs or biomarker identification enable scientists to develop techniques for ablating CSCs and clinicians to provide cancer cure, especially in GI cancers characterized by inflammation-driven carcinogenesis...
July 14, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28706745/acute-esophageal-necrosis-in-an-alcoholic-after-successful-resuscitation-from-cardiac-arrest
#4
Amish Shah, Viveksandeep Thoguluva Chandreskar, Ravi Doobay, Arundeep Kahlon, Ioana Amzuta
INTRODUCTION: We present a patient who presented to the ICU after successful resuscitation from cardiac arrest who was subsequently diagnosed with AEN. CASE PRESENTATION: A 66-year-old female presented after cardiac arrest in which return of spontaneous circulation was achieved within 7 minutes after the initiation of CPR. She was intubated on the scene and found to have coffee ground emesis in her bathroom when found unresponsive. Due to the hemodynamically significant GI bleed, patient was started on IV proton pump inhibitor, octreotide, and levophed...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/28705991/oxygen-metabolism-and-innate-immune-responses-in-the-gut
#5
Sean Patrick Colgan, Eric L Campbell
Epithelial cells of the mucosa provide a first line of protection against the inappropriate flux of antigens from the outside world. In the gastrointestinal (GI) tract, this barrier is provided at a number of levels, including mucus production, epithelial junctional complexes and the production of antimicrobial molecules. In recent years, it is better appreciated that tissue oxygen metabolism is key to homeostasis in the mucosa. The intestine, for example, maintains a low baseline pO2 levels due to counter-current blood flow and the presence of large numbers of bacteria...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28695451/the-endoscopic-findings-of-the-upper-gastrointestinal-tract-in-patients-with-crohn-s-disease
#6
REVIEW
Yoshiki Nomura, Kentaro Moriichi, Mikihiro Fujiya, Toshikatsu Okumura
Crohn's disease (CD) is a type of chronic inflammatory bowel disease (IBD) associated with ulceration, and the main foci of the inflammation in CD patients are typically the terminal ileum and colon. However, in the upper gastrointestinal tract (GIT), including the esophagus, stomach and duodenum, inflammatory lesions are also detected as well, with a relatively high frequency (30-75%). Recent advances in imaging modalities, including endoscopy, have aided in the diagnosis of CD. Various lesions, including aphtha, erosion, ulcers, bamboo-joint-like appearance and notch-like appearance, are detected in the upper GI of CD patients...
August 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28689639/regulation-of-inflammation-by-members-of-the-formyl-peptide-receptor-family
#7
REVIEW
Keqiang Chen, Zhiyao Bao, Wanghua Gong, Peng Tang, Teizo Yoshimura, Ji Ming Wang
Inflammation is associated with a variety of diseases. The hallmark of inflammation is leukocyte infiltration at disease sites in response to pathogen- or damage-associated chemotactic molecular patterns (PAMPs and MAMPs), which are recognized by a superfamily of seven transmembrane, Gi-protein-coupled receptors (GPCRs) on cell surface. Chemotactic GPCRs are composed of two major subfamilies: the classical GPCRs and chemokine GPCRs. Formyl-peptide receptors (FPRs) belong to the classical chemotactic GPCR subfamily with unique properties that are increasingly appreciated for their expression on diverse host cell types and the capacity to interact with a plethora of chemotactic PAMPs and MAMPs...
July 6, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28687795/the-anti-hiv-candidate-abx464-dampens-intestinal-inflammation-by-triggering-il-22-production-in-activated-macrophages
#8
Karim Chebli, Laura Papon, Conception Paul, Aude Garcel, Noëlie Campos, Didier Scherrer, Hartmut J Ehrlich, Michael Hahne, Jamal Tazi
The progression of human immunodeficiency virus (HIV) is associated with mucosal damage in the gastrointestinal (GI) tract. This damage enables bacterial translocation from the gut and leads to subsequent inflammation. Dextran sulfate sodium (DSS-exposure) is an established animal model for experimental colitis that was recently shown to recapitulate the link between GI-tract damage and pathogenic features of SIV infection. The current study tested the protective properties of ABX464, a first-in-class anti-HIV drug candidate currently in phase II clinical trials...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28666095/efficacy-of-early-enteral-immunonutrition-on-immune-function-and-clinical-outcome-for-postoperative-patients-with-gastrointestinal-cancer
#9
Zhenzhen Luo, Junxia Wang, Zhen Zhang, Hong Li, Lan Huang, Yamin Qiao, Dan Wang, Jingjing Huang, Luwei Guo, Jinbo Liu, Yanhua Liu, Yi Zhang
BACKGROUND: Nutrition support is crucial for patients with gastrointestinal (GI) cancer after the operation. However, the controversy over the application of parenteral nutrition (PN) and early enteral immunonutrition (EEIN) has no determinate conclusion. MATERIALS AND METHODS: We compared the effects of PN and EEIN on the postoperative nutrition condition, immune status, inflammation level, long-term survival, and quality of life of the patients with GI cancer...
June 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28656964/il-33-promotes-gastrointestianl-allergy-in-a-tslp-independent-manner
#10
H Han, F Roan, L K Johnston, D E Smith, P J Bryce, S F Ziegler
Atopic dermatitis (AD) often precedes asthma and food allergy, indicating that epicutaneous sensitization to allergens may be important in the induction of allergic responses at other barrier surfaces. Thymic stromal lymphopoietin (TSLP) and interleukin (IL)-33 are two cytokines that may drive type 2 responses in the skin; both are potential targets in the treatment of allergic diseases. We tested the functional role of IL-33 and the interplay between IL-33 and TSLP in mouse models of atopic march and gastrointestinal (GI) allergy...
June 28, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28655971/significant-improvement-selected-mediators-of-inflammation-in-phenotypes-of-women-with-pcos-after-reduction-and-low-gi-diet
#11
Małgorzata Szczuko, Marta Zapałowska-Chwyć, Dominika Maciejewska, Arleta Drozd, Andrzej Starczewski, Ewa Stachowska
Many researchers suggest an increased risk of atherosclerosis in women with polycystic ovary syndrome. In the available literature, there are no studies on the mediators of inflammation in women with PCOS, especially after dietary intervention. Eicosanoids (HETE and HODE) were compared between the biochemical phenotypes of women with PCOS (normal and high androgens) and after the 3-month reduction diet. Eicosanoid profiles (9(S)-HODE, 13(S)-HODE, 5(S)-HETE, 12(S)-HETE, 15(S)-HETE, 5(S)-oxoETE, 16(R)-HETE, 16(S)-HETE and 5(S), 6(R)-lipoxin A4, 5(S), 6(R), 15(R)-lipoxin A4) were extracted from 0...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28654190/interobserver-variability-in-scoring-liver-biopsies-with-a-diagnosis-of-alcoholic-hepatitis
#12
Bela Horvath, Daniela Allende, Hao Xie, John Guirguis, Jennifer Jeung, James Lapinski, Deepa Patil, Arthur J McCullough, Srinivasan Dasarathy, Xiuli Liu
BACKGROUND: Alcoholic hepatitis (AH) is one of the most severe forms of alcoholic liver disease. Recently, a histologic scoring system for predicting prognosis in this patient cohort was proposed as Alcoholic Hepatitis Histologic Score (AHHS). We aimed to assess interobserver variability in recognizing histologic features of AH, and the effect of this variability on the proposed AHHS categories. DESIGN: Hematoxylin-eosin and trichrome stained slides from 32 patients diagnosed with AH with liver biopsies within 1 month of presentation (2000-2015), were reviewed by 5 pathologists including 3 liver pathologists and 2 gastrointestinal (GI) pathologists masked to the clinical findings or outcome...
June 27, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28652148/value-of-upper-endoscopic-biopsies-in-predicting-medical-refractoriness-in-pediatric-patients-with-ulcerative-colitis
#13
Katrina J Sullivan, Mike Wei, Elizabeth Chernetsova, Soufiane Hallani, Joseph de Nanassy, Eric I Benchimold, David R Mack, Ahmed Nasr, Dina El Demellawy
Refractory ulcerative colitis (UC) occurs in patients who experience a severe disease manifestation that is unresponsive to medical therapy. The assessment of upper endoscopic microscopic findings and its correlation with refractory UC has not been fully studied in pediatric patients, and is the focus of this study. Medical records of UC patients treated at a tertiary pediatric center between 2000 and 2014 were reviewed. Endoscopic biopsies of the upper gastrointestinal tract of patients meeting a priori inclusion criteria were compared between refractory UC patients and non-refractory UC patients for active inflammation...
June 23, 2017: Human Pathology
https://www.readbyqxmd.com/read/28651250/a-role-for-neuronal-alpha-synuclein-in-gastrointestinal-immunity
#14
Ethan Stolzenberg, Deborah Berry, De Yang, Ernest Y Lee, Alexander Kroemer, Stuart Kaufman, Gerard C L Wong, Joost J Oppenheim, Supti Sen, Thomas Fishbein, Ad Bax, Brent Harris, Denise Barbut, Michael A Zasloff
BACKGROUND: Alpha-synuclein (αS) is a nerve cell protein associated with Parkinson disease (PD). Accumulation of αS within the enteric nervous system (ENS) and its traffic from the gut to the brain are implicated in the pathogenesis and progression of PD. αS has no known function in humans and the reason for its accumulation within the ENS is unknown. Several recent studies conducted in rodents have linked αS to immune cell activation in the central nervous system. We hypothesized that αS in the ENS might play a role in the innate immune defenses of the human gastrointestinal (GI) tract...
June 27, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28643288/inhibitory-effect-of-fsllry-nh2-on-inflammatory-responses-induced-by-hydrogen-peroxide-in-hepg2-cells
#15
Yeon Joo Lee, Su Jin Kim, Kyoung Wan Kwon, Won Mo Lee, Wi Joon Im, Uy Dong Sohn
Proteinase activated receptor 2 (PAR2), which is localized in the GI tract, the respiratory system, and the kidney tubules is a G protein-coupled receptor associated with inflammation, metabolism, and disease. The aim of this study was to explore the role of PAR2 in hydrogen peroxide (H2O2)-induced HepG2 cells by using FSLLRY-NH2 a PAR2 antagonist. H2O2 treatment resulted in induction of PAR2 in esophageal, gastric, and liver cells, with the most robust response being in HepG2 cells. Furthermore, this effect was dose-dependent in HepG2 cells...
June 22, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28642555/chlorhexidine-mouthwash-plaque-levels-and-gingival-health
#16
Derek Richards
Data sourcesCochrane Oral Health's Trials Register; Cochrane Central Register of Controlled Trials (CENTRAL) Medline; clinicaltrials.gov and the World Health Organization International Clinical Trials Registry Platform. There were no language or date restrictions on searches.Study selectionRandomised controlled trials (RCTs) assessing the effects of chlorhexidine mouthrinse used as an adjunct to mechanical oral hygiene procedures for at least four weeks on gingivitis in children and adults.Data extraction and synthesisTwo reviewers independently abstracted data and assessed risk of bias...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28642553/effect-of-essential-oil-mouthwashes-on-plaque-and-gingivitis
#17
Derek Richards
Data sourcesMedline, Embase, LILACS and Scopus database.Study selectionStudies were screened independently by three reviewers. Randomised controlled trials with a minimum of six months follow-up of daily use of essential oils-containing (EO) mouthwashes compared with placebo, flossing or cetylpyridinium chloride (CPC) as adjuncts to mechanical plaque control were considered.Data extraction and synthesisData were abstracted by two reviewers and study quality assessed using the Cochrane risk of bias tool. Dental plaque was summarised using the Turesky modification of the Quigley-Hein Index (QHI), gingivitis using three indices; the Gingival Index (GI) by Loe and Silness, the Modified Gingival Index (MGI) and bleeding upon probing...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28637585/effects-of-periodontal-endoscopy-on-the-treatment-of-periodontitis-a-systematic-review-and-meta-analysis
#18
REVIEW
Yunchun Kuang, Bo Hu, Jin Chen, Ge Feng, Jinlin Song
BACKGROUND: For this systematic review, the authors evaluated and synthesized the available scientific evidence related to the effects of periodontal endoscopy on the treatment of periodontitis. METHODS: The authors searched PubMed, Embase, Cochrane Library, Chinese Scientific Journals database, China National Knowledge Infrastructure, and Chinese Medicine Premier's Wanfang database for articles about periodontal endoscopy that were published through January 2017...
June 18, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28631250/lactobacillus-salivarius-nk02-a-potent-probiotic-for-clinical-application-in-mouthwash
#19
Neda Sajedinejad, Mojgan Paknejad, Behzad Houshmand, Hakimeh Sharafi, Reza Jelodar, Hossein Shahbani Zahiri, Kambiz Akbari Noghabi
A specific strain of naturally occurring oral lactobacilli was isolated and identified based on morphological, biochemical, and 16S rRNA gene sequencing. The phylogenetic affiliation of the isolate confirmed that the NK02 strain had close association with the Lactobacillus salivarius. An effective mouthwash was developed for treatment of periodontitis and suppression of the indicator bacterium Aggregatibacter actinomycetemcomitans which is an obvious pathogen of periodontal disease. The mouthwash containing L...
June 19, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28630946/differentiation-and-inflammation-best-enemies-in-gastrointestinal-carcinogenesis
#20
Nathan M Krah, L Charles Murtaugh
While recent studies demonstrate that cancer can arise from mutant stem cells, this hypothesis does not explain why tissues without defined stem cell populations are susceptible to inflammation-driven tumorigenesis. We propose that chronic inflammatory diseases, such as colitis and pancreatitis, predispose to gastrointestinal (GI) adenocarcinoma by reprogramming differentiated cells. Focusing on colon and pancreas, we discuss recently discovered connections between inflammation and loss of cell differentiation, and propose that dysregulation of cell fate may be a novel rate-limiting step of tumorigenesis...
December 2016: Trends in Cancer
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