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mucosal barrier injury

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https://www.readbyqxmd.com/read/29907236/peritoneal-lavage-with-povidone-iodine-solution-in-colorectal-cancer-induced-rats
#1
Hua-Li Song, Dong-Mei Zhang, Heng Wen, Meng Wang, Na Zhao, Yu-Hua Gao, Ni Ding
BACKGROUND: Although peritoneal lavage with povidone-iodine (PVPI) is frequently performed after surgery on the gastrointestinal tract, the effects of PVPI on the intestinal epithelial barrier are unknown. The purpose of this study was to investigate the effects of abdominal irrigation with PVPI on the intestinal epithelial barrier in a colorectal cancer (CRC)-induced rat model. MATERIALS AND METHODS: The CRC model was induced in rats with azoxymethane and dextran sodium sulfate...
August 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29849494/mast-cells-exert-anti-inflammatory-effects-in-an-il10-model-of-spontaneous-colitis
#2
E M Lennon, L B Borst, L L Edwards, A J Moeser
Mast cells are well established as divergent modulators of inflammation and immunosuppression, but their role in inflammatory bowel disease (IBD) remains to be fully defined. While previous studies have demonstrated a proinflammatory role for mast cells in acute models of chemical colitis, more recent investigations have shown that mast cell deficiency can exacerbate inflammation in spontaneous colitis models, thus suggesting a potential anti-inflammatory role of mast cells in IBD. Here, we tested the hypothesis that in chronic, spontaneous colitis, mast cells are protective...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29848021/inflammation-related-differences-in-mucosa-associated-microbiota-and-intestinal-barrier-function-in-colonic-crohn-s-disease
#3
Josie Libertucci, Usha Dutta, Sandeep Kaur, Jennifer Jury, Laura Rossi, Michelle E Fontes, M Sharif Shajib, Waliul I Khan, Michael G Surette, Elena F Verdu, David Armstrong
BACKGROUND AND AIMS: Crohn's disease (CD), characterized by discontinuous intestinal injury and inflammation, has been associated with changes in luminal microbial composition and impaired barrier function. The relationships between visual features of intestinal injury, permeability and the mucosa-associated microbiota are unclear. METHODS: Individuals undergoing routine colonoscopy (controls) and patients with CD were evaluated by clinical parameters and confocal laser scanning endomicroscopic colonoscopy (CLE)...
May 31, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29794015/innate-recognition-of-the-microbiota-by-tlr1-promotes-epithelial-homeostasis-and-prevents-chronic-inflammation
#4
Karishma Kamdar, Andrew M F Johnson, Denise Chac, Kalisa Myers, Vrishika Kulur, Kyle Truevillian, R William DePaolo
There is cross-talk between the intestinal epithelium and the microbiota that functions to maintain a tightly regulated microenvironment and prevent chronic inflammation. This communication is partly mediated through the recognition of bacterial proteins by host-encoded innate receptors, such as TLRs. However, studies examining the role of TLR signaling on colonic homeostasis have given variable and conflicting results. Despite its critical role in mediating immunity during enteric infection of the small intestine, TLR1-mediated recognition of microbiota-derived ligands and their influence on colonic homeostasis has not been well studied...
May 23, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29755706/infectious-risks-and-complications-in-adult-leukemic-patients-receiving-blinatumomab
#5
Wonhee So, Shuchi Pandya, Rod Quilitz, Bijal Shah, John N Greene
Background: Blinatumomab is an anti-CD19 immunotherapy approved for relapsed/refractory B-cell acute lymphoblastic leukemia (ALL) with significantly increased survival rate. While blinatumomab showed lower rates of infection, neutropenia and mucosal barrier injury versus chemotherapy, its infection risks are not well described. Methods: All patients who received blinatumomab for ≥ seven days at an academic cancer center from May 2015 to April 2017 were included...
2018: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/29665727/changes-in-central-line-associated-bloodstream-infection-rates-among-children-with-immune-compromised-conditions-an-11-year-review
#6
Lauri A Linder, Cheryl Gerdy, Yeonjung Jo, Andrew Wilson
This article describes changes in central line-associated bloodstream infection (CLABSI) rates among common causative organisms over an 11-year period on a pediatric inpatient unit prior to and following CLABSI reduction strategies. The setting for this descriptive cohort design study was a 32-bed inpatient unit in a tertiary pediatric hospital serving children with immune compromised conditions, including cancer and recipients of hematopoietic stem cell and solid organ transplants. Between January 2006 and December 2016, 265 CLABSIs involving 189 patients were reported...
April 1, 2018: Journal of Pediatric Oncology Nursing: Official Journal of the Association of Pediatric Oncology Nurses
https://www.readbyqxmd.com/read/29649549/bloodstream-infections-in-cancer-patients-risk-factors-associated-with-mortality
#7
Beda Islas-Muñoz, Patricia Volkow-Fernández, Cynthia Ibanes-Gutiérrez, Alberto Villamar-Ramírez, Diana Vilar-Compte, Patricia Cornejo-Juárez
OBJECTIVE: The aim of this study was to evaluate the clinical characteristics and risk factors associated with mortality in cancer patients with bloodstream infections (BSI), analyzing multidrug resistant bacteria (MDR). METHODS: We conducted a prospective observational study at a cancer referral center from August 2016 to July 2017, which included all BSI. RESULTS: 4220 patients were tested with blood cultures; 496 were included. Mean age was 48 years...
June 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29615110/gut-dependent-microbial-translocation-induces-inflammation-and-cardiovascular-events-after-st-elevation-myocardial-infarction
#8
Xin Zhou, Jing Li, Junli Guo, Bin Geng, Wenjie Ji, Qian Zhao, Jinlong Li, Xinlin Liu, Junxiang Liu, Zhaozeng Guo, Wei Cai, Yongqiang Ma, Dong Ren, Jun Miao, Shaobo Chen, Zhuoli Zhang, Junru Chen, Jiuchang Zhong, Wenbin Liu, Minghui Zou, Yuming Li, Jun Cai
BACKGROUND: Post-infarction cardiovascular remodeling and heart failure are the leading cause of myocardial infarction (MI)-driven death during the past decades. Experimental observations have involved intestinal microbiota in the susceptibility to MI in mice; however, in humans, identifying whether translocation of gut bacteria to systemic circulation contributes to cardiovascular events post-MI remains a major challenge. RESULTS: Here, we carried out a metagenomic analysis to characterize the systemic bacteria in a cohort of 49 healthy control individuals, 50 stable coronary heart disease (CHD) subjects, and 100 ST-segment elevation myocardial infarction (STEMI) patients...
April 3, 2018: Microbiome
https://www.readbyqxmd.com/read/29605020/targeting-intestinal-epithelial-cell-programmed-necrosis-alleviates-tissue-injury-after-intestinal-ischemia-reperfusion-in-rats
#9
Xiang Li, Yihong Ling, Zhongming Cao, Jiantong Shen, Shaoqian Chen, Weifeng Liu, Baolong Yuan, Shihong Wen
BACKGROUND: Intestinal dysfunction, especially acute pathologies linked to intestinal ischemia/reperfusion (I/R) injury, is profoundly affected by inflammation and improper execution of cell death. Few studies have examined the efficacy of combined strategies in regulated intestinal epithelial necrosis after intestinal I/R. Here, we evaluated the functional interaction between poly (adenosine diphosphate-ribose) polymerase 1 (PARP-1)-induced parthanatos and receptor-interacting protein 1/3 (RIP1/3) kinase-induced necroptosis in the pathophysiological course of acute ischemic intestinal injury...
May 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29560765/a-retrospective-analysis-of-bloodstream-infections-in-pediatric-allogeneic-stem-cell-transplant-recipients-the-role-of-central-venous-catheters-and-mucosal-barrier-injury
#10
Chelsea Balian, Michelle Garcia, Jessica Ward
BACKGROUND: Bloodstream infections (BSIs) are a leading cause of morbidity and mortality in children undergoing hematopoietic stem cell transplant (HSCT). Indwelling central venous catheters (CVCs) increase risk for BSIs, yet mucosal barrier injury-associated laboratory-confirmed bloodstream infection (MBI-LCBI) may also occur due to translocation of pathogenic organisms from the gastrointestinal tract into the bloodstream. The purpose of this study was to determine the association between stool organisms and BSIs in children with CVCs who underwent HSCT...
May 2018: Journal of Pediatric Oncology Nursing: Official Journal of the Association of Pediatric Oncology Nurses
https://www.readbyqxmd.com/read/29540694/the-mitochondrially-targeted-antioxidant-mitoq-protects-the-intestinal-barrier-by-ameliorating-mitochondrial-dna-damage-via-the-nrf2-are-signaling-pathway
#11
Qiongyuan Hu, Jianan Ren, Guanwei Li, Jie Wu, Xiuwen Wu, Gefei Wang, Guosheng Gu, Huajian Ren, Zhiwu Hong, Jieshou Li
Disruption of the mucosal barrier following intestinal ischemia reperfusion (I/R) is life threatening in clinical practice. Mitochondrial dysfunction and oxidative stress significantly contribute to the early phase of I/R injury and amplify the inflammatory response. MitoQ is a mitochondrially targeted antioxidant that exerts protective effects following I/R injury. In the present study, we aimed to determine whether and how MitoQ protects intestinal epithelial cells (IECs) from I/R injury. In both in vivo and in vitro studies, we found that MitoQ pretreatment downregulated I/R-induced oxidative stress and stabilized the intestinal barrier, as evidenced by MitoQ-treated I/R mice exhibiting attenuated intestinal hyperpermeability, inflammatory response, epithelial apoptosis, and tight junction damage compared to controls...
March 14, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29508389/pyloric-metaplasia-pseudopyloric-metaplasia-ulcer-associated-cell-lineage-and-spasmolytic-polypeptide-expressing-metaplasia-reparative-lineages-in-the-gastrointestinal-mucosa
#12
James R Goldenring
The gastrointestinal mucosae provide a critical barrier between the external and internal milieu. Thus, damage to the mucosa requires an immediate response to provide appropriate wound closure and healing. Metaplastic lineages with phenotypes similar to the mucous glands of the distal stomach or Brunner's glands have been associated with various injurious scenarios in the stomach, small bowel, and colon. These lineages have been assigned various names including pyloric metaplasia, pseudopyloric metaplasia, ulcer-associated cell lineage (UACL), and spasmolytic polypeptide-expressing metaplasia (SPEM)...
June 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29487524/free-total-rhubarb-anthraquinones-protect-intestinal-injury-via-regulation-of-the-intestinal-immune-response-in-a-rat-model-of-severe-acute-pancreatitis
#13
Yuxia Xiong, Li Chen, Ling Fan, Lulu Wang, Yejiang Zhou, Dalian Qin, Qin Sun, Jianming Wu, Shousong Cao
Intestinal mucosal immune barrier dysfunction plays a key role in the pathogenesis of severe acute pancreatitis (SAP). Rhubarb is a commonly used traditional Chinese medicine as a laxative in China. It markedly protects pancreatic acinar cells from trypsin-induced injury in rats. Free total rhubarb anthraquinones (FTRAs) isolated and extracted from rhubarb display the beneficial effects of antibacteria, anti-inflammation, antivirus, and anticancer. The principal aim of the present study was to investigate the effects of FTRAs on the protection of intestinal injury and modification of the intestinal barrier function through regulation of intestinal immune function in rats with SAP...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29471085/houttuynia-cordata-polysaccharides-ameliorate-pneumonia-severity-and-intestinal-injury-in-mice-with-influenza-virus-infection
#14
Haiyan Zhu, Xiaoxiao Lu, Lijun Ling, Hong Li, Yingye Ou, Xunlong Shi, Yan Lu, Yunyi Zhang, Daofeng Chen
ETHNOPHARMACOLOGICAL RELEVANCE: Hottuynia cordata is an important traditional Chinese medicine for the treatment of respiratory diseases including bacterial and viral infections. Polysaccharides isolated from Houttuynia cordata (HCP), as its main ingredients, have been demonstrated to ameliorate the LPS-induced acute lung injury in mice. The study aimed to determine the protective effects of HCP on multiple organ injury in influenza A virus (IAV) H1N1 infected mice and its primary mechanisms in anti-inflammation and immune regulation...
May 23, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29461464/protective-effects-of-the-complement-inhibitor-compstatin-cp40-in-hemorrhagic-shock
#15
Martijn van Griensven, Daniel Ricklin, Stephanie Denk, Rebecca Halbgebauer, Christian K Braun, Anke Schultze, Felix Hönes, Sofia Koutsogiannaki, Alexandra Primikyri, Edimara Reis, David Messerer, Sebastian Hafner, Peter Radermacher, Ali-Reza Biglarnia, Ranillo R G Resuello, Joel V Tuplano, Benjamin Mayer, Kristina Nilsson, Bo Nilsson, John D Lambris, Markus Huber-Lang
Trauma-induced hemorrhagic shock (HS) plays a decisive role in the development of immune, coagulation, and organ dysfunction often resulting in a poor clinical outcome. Imbalanced complement activation is intricately associated with the molecular danger response and organ damage after HS. Thus, inhibition of the central complement component C3 as turnstile of both inflammation and coagulation is hypothesized as a rational strategy to improve the clinical course after HS.Applying intensive care conditions, anaesthetized, monitored, and protectively ventilated non-human primates (NHP; cynomolgus monkeys) received a pressure-controlled severe HS (60 min at MAP 30 mmHg) with subsequent volume resuscitation...
February 14, 2018: Shock
https://www.readbyqxmd.com/read/29460464/effect-of-sucralfate-on-gastric-permeability-in-an-ex-vivo-model-of-stress-related-mucosal-disease-in-dogs
#16
Tracy L Hill, B Duncan X Lascelles, Anthony T Blikslager
BACKGROUND: Sucralfate is a gastroprotectant with no known systemic effects. The efficacy of sucralfate for prevention and treatment of stress-related mucosal diseases (SRMD) in dogs is unknown. HYPOTHESIS/OBJECTIVES: To develop a canine ex vivo model of SRMD and to determine the effect of sucralfate on mucosal barrier function in this model. ANIMALS: Gastric antral mucosa was collected immediately postmortem from 29 random-source apparently healthy dogs euthanized at a local animal control facility...
March 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29456409/recombinant-expressed-vasoactive-intestinal-peptide-analogue-ameliorates-tnbs-induced-colitis-in-rats
#17
Chun-Lan Xu, Yu Guo, Lei Qiao, Li Ma, Yi-Yi Cheng
AIM: To investigate the modulatory effect of recombinant-expressed vasoactive intestinal peptide (VIP) analogue (rVIPa) on trinitrobenzene sulfonic acid (TNBS)-induced colitis in rats. METHODS: Forty-eight rats were randomized into six groups: normal control group (Control), model control group (TNBS), ethanol treatment group (ETOH), and VIP treatment groups with different dosage (rVIPa1nmol , rVIPa2nmol , rVIPa4nmol ). Diarrhea and bloody stool were observed. Colonic damage was evaluated histologically...
February 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29427515/injury-repair-inflammation-and-metaplasia-in-the-stomach
#18
Anne R Meyer, James R Goldenring
The development of intestinal-type gastric cancer is preceded by the emergence of metaplastic cell lineages in the gastric mucosa. In particular, intestinal metaplasia and spasmolytic polypeptide-expressing metaplasia (SPEM) have been associated with the pathological progression to intestinal-type gastric cancer. The development of SPEM represents a physiological response to damage that recruits reparative cells to sites of mucosal injury. Metaplastic cell lineages are characterized by mucus secretion, adding a protective barrier to the epithelium...
February 10, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29427225/autophagy-strengthens-intestinal-mucosal-barrier-by-attenuating-oxidative-stress-in-severe-acute-pancreatitis
#19
Luqiao Huang, Yingjian Jiang, Zhenqing Sun, Zhengyu Gao, Jiang Wang, Dianliang Zhang
BACKGROUND: Intestinal mucosal barrier dysfunction can be caused by severe acute pancreatitis (SAP). It is normally associated with changes to mucosal autophagy and oxidative stress. OBJECTIVE: The aim of this study was to investigate the correlation between autophagy and oxidative stress on the intestinal mucosal barrier of SAP rat model. METHODS: SAP was induced by retrograde injection of sodium taurocholate (5%) into the biliopancreatic duct...
April 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29394953/bcn057-induces-intestinal-stem-cell-repair-and-mitigates-radiation-induced-intestinal-injury
#20
Payel Bhanja, Andrew Norris, Pooja Gupta-Saraf, Andrew Hoover, Subhrajit Saha
BACKGROUND: Radiation-induced gastrointestinal syndrome (RIGS) results from the acute loss of intestinal stem cells (ISC), impaired epithelial regeneration, and subsequent loss of the mucosal barrier, resulting in electrolyte imbalance, diarrhea, weight loss, sepsis, and mortality. The high radiosensitivity of the intestinal epithelium limits effective radiotherapy against abdominal malignancies and limits the survival of victims of nuclear accidents or terrorism. Currently, there is no approved therapy to mitigate radiation toxicity in the intestine...
February 2, 2018: Stem Cell Research & Therapy
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