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mucosal barrier injury

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https://www.readbyqxmd.com/read/29665727/changes-in-central-line-associated-bloodstream-infection-rates-among-children-with-immune-compromised-conditions-an-11-year-review
#1
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
#2
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 (MDRB). METHODS: We conducted a prospective observational study at a cancer referral center from August 2016 to July 2017, which included all BSI. RESULTS: 4,220 patients were tested with blood cultures; 496 were included. Mean age was 48 years...
April 9, 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
#3
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
#4
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
#5
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...
March 1, 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
#6
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
#7
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)...
March 5, 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
#8
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
#9
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...
February 19, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29461464/protective-effects-of-the-complement-inhibitor-compstatin-cp40-in-hemorrhagic-shock
#10
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
#11
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...
February 20, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29456409/recombinant-expressed-vasoactive-intestinal-peptide-analogue-ameliorates-tnbs-induced-colitis-in-rats
#12
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
#13
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
#14
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
#15
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
https://www.readbyqxmd.com/read/29381385/influence-of-functional-food-components-on-gut-health
#16
Murphy L Y Wan, K H Ling, Hani El-Nezami, M F Wang
Intestinal epithelial cells (IECs) lining the gastrointestinal tract establish a barrier between external environments and the internal milieu. An intact intestinal barrier maintains gut health and overall good health of the body by preventing from tissue injury, pathogen infection and disease development. When the intestinal barrier function is compromised, bacterial translocation can occur. Our gut microbiota also plays a fundamentally important role in health, for example, by maintaining intestinal barrier integrity, metabolism and modulating the immune system, etc...
January 30, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29358413/the-hypoxia-adenosine-link-during-intestinal-inflammation
#17
REVIEW
Jessica L Bowser, Luan H Phan, Holger K Eltzschig
Intestinal inflammation is a key element in inflammatory bowel disease and is related to a combination of factors, including genetics, mucosal barrier dysfunction, bacteria translocation, deleterious host-microbe interactions, and dysregulated immune responses. Over the past decade, it has been appreciated that these inflammatory lesions are associated with profound tissue hypoxia. Interestingly, an endogenous adaptive response under the control of hypoxia signaling is enhancement in adenosine signaling, which impacts these different endpoints, including promoting barrier function and encouraging anti-inflammatory activity...
February 1, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29351391/the-bile-acids-deoxycholic-acid-and-ursodeoxycholic-acid-regulate-colonic-epithelial-wound-healing
#18
Magdalena S Mroz, Natalia K Lajczak, Bridie J Goggins, Simon Keely, Stephen J Keely
The intestinal epithelium constitutes an innate barrier which, upon injury, undergoes self-repair processes known as restitution. Although bile acids are known as important regulators of epithelial function in health and disease, their effects on wound healing processes are not yet clear. Here we set out to investigate the effects of the colonic bile acids, deoxycholic acid (DCA) and ursodeoxycholic acid (UDCA), on epithelial restitution. Wound healing in T84 cell monolayers grown on transparent, permeable supports was assessed over 48 h with or without bile acids...
March 1, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29242771/sentinels-at-the-frontline-the-role-of-intraepithelial-lymphocytes-in-inflammatory-bowel-disease
#19
Madeleine D Hu, Karen L Edelblum
Purpose of review: Intestinal mucosal immunity is tightly regulated to ensure effective host defense against invasive microorganisms while limiting the potential for aberrant damage. In inflammatory bowel disease (IBD), an imbalance between effector and regulatory T cell populations results in an uncontrolled inflammatory response to commensal bacteria. Intraepithelial lymphocytes (IEL) are perfectly positioned within the intestinal epithelium to provide the first line of mucosal defense against luminal microbes or rapidly respond to epithelial injury...
December 2017: Current Pharmacology Reports
https://www.readbyqxmd.com/read/29201164/electroacupuncture-improves-acute-bowel-injury-recovery-in-rat-models
#20
Jiannong Wu, Bin Lyu, Tie'er Gan, Lingcong Wang, Meifei Zhu
Electroacupuncture (EA) accelerates intestinal functional recovery in sepsis. The present study investigated ghrelin and ghrelin receptor (GSH-R) levels during EA in rats with acute bowel injury (ABI). Rats were grouped into four groups: Sham, ABI, ABI+EA and ABI+GHRA+EA (n=12 per group). ABI was induced by cecal ligation and puncture (CLP). EA on bilateral Zusanli acupoints was performed following CLP. GSH-R blocker (GHRA) was used following CLP but prior to EA for ABI+GHRA+EA rats. Rats were sacrificed 12 h following CLP...
November 2017: Experimental and Therapeutic Medicine
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