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ARDS model

John S Harrington, Edward J Schenck, Clara Oromendia, Augustine M K Choi, Ilias I Siempos
PURPOSE: We examined whether patients with acute respiratory distress syndrome (ARDS) lacking risk factors are enrolled in therapeutic trials and assessed their clinical characteristics and outcomes. METHODS: We performed a secondary analysis of patient-level data pooled from the ARMA, ALVEOLI, FACTT, ALTA and EDEN ARDSNet randomized controlled trials obtained from the Biologic Specimen and Data Repository Information Coordinating Center of the National Heart, Lung and Blood Institute...
June 2, 2018: Journal of Critical Care
Xiaotao Xu, Qingwei Zhu, Fangfang Niu, Rong Zhang, Yan Wang, Wenying Wang, Dawei Sun, Xintao Wang, Aizhong Wang
The epithelial barrier of the lung is destroyed during acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) due to the apoptosis of alveolar epithelial cells (AECs). Therefore, treatments that block AEC apoptosis might be a therapeutic strategy to ameliorate ALI. Based on recent evidence, A2B adenosine receptor (A2BAR) plays an important role in ALI in several different animal models, but its exact function in AECs has not been clarified. We investigated the role of A2BAR in AEC apoptosis in a mouse model of oleic acid (OA)-induced ALI and in hydrogen peroxide (H2 O2 )-induced AEC (A549 cells and MLE-12 cells) injury...
June 13, 2018: American Journal of Physiology. Cell Physiology
Kunping Li, Zhuoru He, Xinqiuyue Wang, Miguel Pineda, Runbao Chen, Haiqi Liu, Kaiting Ma, Huanjia Shen, Chunhui Wu, Ningtin Huang, Tianling Pan, Yun Liu, Jiao Guo
Acute lung injury (ALI) and its more severe form acute respiratory distress syndrome (ARDS) are life-threatening conditions with high morbility and mortality, underscoring the urgent need for novel treatments. Leaves of the medicinal herb Microcos paniculata have been traditionally used for treating upper airway infections, by virtue of its content of flavonoids such as apigenin C-glycosides (ACGs). C-glycosides have been shown to exert strong anti-inflammatory properties, although their mechanism of action remains unknown...
June 8, 2018: Free Radical Biology & Medicine
Andrew D Revell, Dechao Wang, Maria-Jesus Perez-Elias, Robin Wood, Dolphina Cogill, Hugo Tempelman, Raph L Hamers, Peter Reiss, Ard I van Sighem, Catherine A Rehm, Anton Pozniak, Julio S G Montaner, H Clifford Lane, Brendan A Larder
Objectives: Optimizing antiretroviral drug combination on an individual basis can be challenging, particularly in settings with limited access to drugs and genotypic resistance testing. Here we describe our latest computational models to predict treatment responses, with or without a genotype, and compare their predictive accuracy with that of genotyping. Methods: Random forest models were trained to predict the probability of virological response to a new therapy introduced following virological failure using up to 50 000 treatment change episodes (TCEs) without a genotype and 18 000 TCEs including genotypes...
June 8, 2018: Journal of Antimicrobial Chemotherapy
Xu Wu, Zilong Liu, Lijuan Hu, Wenyu Gu, Lei Zhu
Endothelial progenitor cell (EPC) has potential to attenuate pulmonary inflammation and injury. As a pivotal paracrine entity of stem cells, whether EPC-derived exosomes (EPC-Exos) contribute to acute lung injury (ALI) remains unknown. Exosomes were purified from conditional medium of EPCs, and then characterized by electron micrograph and immunoblotting. A model of ALI was induced by lipopolysaccharide (LPS) and then rats were transplanted with EPC-Exos. The underlying mechanisms of action of EPC-Exos were examined in vitro endothelial functional assays including the TEER, proliferation (CKK-8), angiogenesis and migration...
June 5, 2018: Experimental Cell Research
Marcelo L M Pereira, Claudio R F Marinho, Sabrina Epiphanio
Malaria is a serious disease and was responsible for 429,000 deaths in 2015. Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is one of the main clinical complications of severe malaria; it is characterized by a high mortality rate and can even occur after antimalarial treatment when parasitemia is not detected. Rodent models of ALI/ARDS show similar clinical signs as in humans when the rodents are infected with murine Plasmodium . In these models, it was shown that the induction of the enzyme heme oxygenase 1 (HO-1) is protective against severe malaria complications, including cerebral malaria and ALI/ARDS...
2018: Frontiers in Cellular and Infection Microbiology
Zhihong Yuan, Brahmchetna Bedi, Ruxana T Sadikot
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) represent a heterogeneous group of lung diseases which continues to have a high morbidity and mortality. The molecular pathogenesis of ALI is being better defined; however, because of the complex nature of the disease molecular therapies have yet to be developed. Here we use a lipopolysaccharide (LPS) induced mouse model of acute septic lung injury to delineate the role of exosomes in the inflammatory response. Using this model, we were able to show that mice that are exposed to intraperitoneal LPS secrete exosomes in Broncho-alveolar lavage (BAL) fluid from the lungs that are packaged with miRNA and cytokines which regulate inflammatory response...
May 21, 2018: Journal of Visualized Experiments: JoVE
Vipul J Patel, Sreeja Biswas Roy, Hiren J Mehta, Myungsoo Joo, Ruxana T Sadikot
Introduction: Acute respiratory distress syndrome (ARDS) is a complex clinical syndrome characterized by acute inflammation, microvascular damage, and increased pulmonary vascular and epithelial permeability, frequently resulting in acute respiratory failure and death. Current best practice for ARDS involves "lung-protective ventilation," which entails low tidal volumes and limiting the plateau pressures in mechanically ventilated patients. Although considerable progress has been made in understanding the pathogenesis of ARDS, little progress has been made in the development of specific therapies to combat injury and inflammation...
2018: BioMed Research International
Megan C Engel, David M Smith, Markus A Jobst, Martin Sajfutdinow, Tim Liedl, Flavio Romano, Lorenzo Rovigatti, Ard A Louis, Jonathan P K Doye
The mechanical properties of DNA nanostructures are of widespread interest as applications that exploit their stability under constant or intermittent external forces become increasingly common. We explore the force response of DNA origami in comprehensive detail by combining AFM single molecule force spectroscopy experiments with simulations using oxDNA, a coarse-grained model of DNA at the nucleotide level, to study the unravelling of an iconic origami system: the Rothemund tile. We contrast the force-induced melting of the tile with simulations of an origami 10-helix bundle...
May 31, 2018: ACS Nano
Zongjian Sun, Zhiqiang Niu, Shuishui Wu, Shiqiang Shan
The effect of sulforaphane on nuclear factor erythroid 2-related factor 2 (Nrf2) and its protective mechanism for lung injury in rabbits with acute respiratory distress syndrome (ARDS) were investigated. Thirty rabbits were randomly divided into control (n=10), model (n=10) and experimental groups (n=10). Rabbits in model group and experimental group were treated with femoral venous injection of oleic acid to establish the ARDS model, while those in control group were injected with the same volume of normal saline...
June 2018: Experimental and Therapeutic Medicine
He Yu, Yue-Nan Ni, Zong-An Liang, Bin-Miao Liang, Yanmei Wang
BACKGROUND: The effects of aspirin in preventing the occurrence of acute respiratory distress syndrome (ARDS)/acute lung injury (ALI) among adult patients are controversial. We aimed to further determine the effectiveness of aspirin in reducing the rate of ARDS/ALI. METHODS: The Pubmed, Embase, Medline,, Cochrane Central Register of Controlled Trials (CENTRAL) as well as the Information Sciences Institute (ISI) Web of Science were searched for all controlled studies that research the role of aspirin in adult patients who have the risk of ARDS/ALI...
May 21, 2018: American Journal of Emergency Medicine
Fernando Plaza, Yipei Wen, Xu Liang
Acid rock drainage (ARD) is one of the most adverse environmental problems of the mine industry, especially in regions with an abundance of coal refuse (CR) deposits (e.g. the Northern Appalachian Coalfield in the USA) where surface and ground waters are affected by this pollution due to the acidity and high content of sulfates and heavy metals. This study explores the effectiveness of the ARD passive remediation method using alkaline clay (AC) through a series of static and long-term kinetic laboratory experiments (over three years) complemented with field measurements and geochemical modeling...
May 15, 2018: Science of the Total Environment
Marcia Danielle Ferreira, Cynthia Pessoa das Neves, Alexandra Brito de Souza, Francisco Beraldi-Magalhães, Giovanni Battista Migliori, Afrânio Lineu Kritski, Marcelo Cordeiro-Santos
OBJECTIVE: To identify factors predictive of mortality in patients admitted to the ICU with tuberculosis (TB)/HIV coinfection in the Manaus, Amazon Region. METHODS: This was a retrospective cohort study of TB/HIV coinfected patients over 18 years of age who were admitted to an ICU in the city of Manaus, Brazil, between January of 2011 and December of 2014. Sociodemographic, clinical, and laboratory variables were assessed. To identify factors predictive of mortality, we employed a Cox proportional hazards model...
April 2018: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
Tam L Nguyen, Carrie E Perlman
Whether alveolar liquid surface tension, T, is elevated in the acute respiratory distress syndrome (ARDS) has not been demonstrated in situ in the lungs. Neither is it known how exogenous surfactant, which has failed to treat ARDS, affects in situ T. We aim to determine T in an acid-aspiration ARDS model before and after exogenous surfactant administration. In isolated rat lungs, we combine servo-nulling pressure measurement and confocal microscopy to determine alveolar liquid T according to the Laplace relation...
May 17, 2018: Journal of Applied Physiology
Yumei Cheng, Zhou Yang, Feng Shen, Bo Liu, Yahui Wang, Yanqi Wu, Ling Yao, Yuqing Liu
OBJECTIVE: To compare the lung protection roles of intraperitoneal pre-injection with penehyclidine for two kinds of rat models with pulmonary and extrapulmonary acute respiratory distress syndrome (ARDSp and ARDSexp). METHODS: Forty healthy adult Sprague-Dawley (SD) rats were randomly divided into five groups (each n = 8): the rats in sham group received only tracheotomy; the ARDS rat models were reproduced by intratracheal inhalation of 0.1 mol/L hydrochloric acid (HCl) 2 mL/kg to simulate ARDSexp (HCl group) and 0...
May 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Shama Virani, Jarin Chindaprasirt, Kosin Wirasorn, Aumkhae Sookprasert, Ongart Somintara, Damnern Vachirodom, Supinda Koonmee, Jirapon Srinakarin, Supot Kamsa-Ard, Krittika Suwanrungruang, Laura S Rozek, Hutcha Sriplung, Surapon Wiangnon
BACKGROUND: The northeast has the lowest incidence of breast cancer of all regions in Thailand, although national rates are increasing. The heterogeneity in subnational trends necessitates a comprehensive evaluation of breast cancer incidence trends and projections to provide evidence for future region-specific strategies that may be employed to attenuate this growing burden. METHODS: Joinpoint regression and age-period-cohort modeling were used to describe trends from 1988-2012...
May 12, 2018: Journal of Epidemiology
Depeng Zhang, Xiaozong Li, Yudong Hu, Hongchao Jiang, Yaxian Wu, Yunhe Ding, Kaikai Yu, Huiqiong He, Jingsong Xu, Lei Sun, Feng Qian
Sepsis caused by Gram-negative bacteria is one of major causes for the progression of acute lung injury (ALI) with limited treatment and effective medicines. Tabersonine is an indole alkaloid mainly isolated from Catharanthus roseus, and a potential drug candidate for treatment of cancer and Alzheimer's disease (AD), however, its anti-inflammatory effect has not been revealed. In this study, we reported that tabersonine ameliorated lipopolysaccharides (LPS)-induced ALI in vivo and inhibited LPS-mediated macrophage activation in vitro...
May 7, 2018: Biochemical Pharmacology
Philipp Klapsing, Onnen Moerer, Christoph Wende, Peter Herrmann, Michael Quintel, Annalen Bleckmann, Jan Florian Heuer
BACKGROUND: Recent clinical studies have not shown an overall benefit of high-frequency oscillatory ventilation (HFOV), possibly due to injurious or non-individualized HFOV settings. We compared conventional HFOV (HFOVcon ) settings with HFOV settings based on mean transpulmonary pressures (PLmean ) in an animal model of experimental acute respiratory distress syndrome (ARDS). METHODS: ARDS was induced in eight pigs by intrabronchial installation of hydrochloric acid (0...
May 9, 2018: Critical Care: the Official Journal of the Critical Care Forum
Thyyar M Ravindranath, Amanda Gomez, Ilana Harwayne-Gidansky, Thomas J Connors, Nathan Neill, Bruce Levin, Joy D Howell, Lisa Saiman, John S Baird
OBJECTIVES: To study the incidence, risk factors, clinical course, and outcome of ARDS in children with HMP and RSV. WORKING HYPOTHESIS: We hypothesized that ARDS in children with HMP was similar in incidence, risk factors, clinical course, and outcomes to ARDS in children with RSV. STUDY DESIGN: Retrospective, observational study over 2 years. PATIENT-SUBJECT SELECTION: Patients included were <18 years old with HMP or RSV detected from nasopharyngeal specimens by commercial reverse transcriptase polymerase chain reaction assay admitted to a study site...
May 7, 2018: Pediatric Pulmonology
Max Andresen, Joaquin Araos, Kwok-Yin Wong, Yun-Chung Leung, Lok-Yan So, Wai-Ting Wong, Salvador Cabrera, Camila Silva, Leyla Alegria, Alejandro Bruhn, Dagoberto Soto
INTRODUCTION: The use of antibiotics is mandatory in patients during extracorporeal membrane oxygenation (ECMO) support. Clinical studies have shown high variability in the antibiotic concentrations, as well as sequestration of them by the ECMO circuit, suggesting that the doses and/or interval administration used during ECMO may not be adequate. Thus, a fast response sensor to estimate antibiotic concentrations in this setting would contribute to improve dose adjustments. The biosensor PenP has been shown to have a dynamic range, sensitivity and specificity useful for pharmacokinetic (PK) tests in healthy subjects...
May 4, 2018: Sensors
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