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https://www.readbyqxmd.com/read/28109142/-changes-and-role-evaluation-of-tnf-%C3%AE-and-il-1%C3%AE-in-lung-tissues-of-ards-mice
#1
Jianing Liang, Qianqian Zhou, Tianxiang Zhang, Xiaosu Wang, Liqiang Song
Objective To study the expression levels of TNF-α and IL-1β in the lung tissues of acute respiratory distress syndrome (ARDS) mice and their relationships with the severity of lung injury in the mice. Methods A mouse model of ARDS was induced by lipopolysaccharide (LPS). The morphological changes of lung tissue was observed by HE staining, and the lung injury score was calculated. Quantitative real-time PCR was employed to detect the mRNA expression levels of TNF-α and IL-1β in lung tissues and ELISA was performed to test the protein levels of TNF-α and IL-1β in bronchoalveolar lavage fluid (BALF)...
February 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28108621/are-physical-measures-related-to-patient-centred-outcomes-in-ards-survivors
#2
Kitty S Chan, Lisa Aronson Friedman, Victor D Dinglas, Catherine L Hough, Carl Shanholtz, E Wesley Ely, Peter E Morris, Pedro A Mendez-Tellez, James C Jackson, Ramona O Hopkins, Dale M Needham
OBJECTIVE: To inform selection of physical measures for studies of acute respiratory distress syndrome (ARDS) survivors within 12 months of ARDS. METHODS: Secondary analysis of data from 6-month survivors participating in a US multicentre prospective study (ARDSNet Long-Term Outcome Study, N=134) or a multisite prospective study in Baltimore, Maryland, USA (Improving Care of Acute Lung Injury Patients, N=99). Physical measures, assessed at 6-month follow-up, were categorised according to the WHO's International Classification of Disability and Health: body functions and structures, activity and participation...
January 20, 2017: Thorax
https://www.readbyqxmd.com/read/28107310/the-renin-inhibitor-aliskiren-protects-rat-lungs-from-the-histopathologic-effects-of-fat-embolism
#3
Amanda N Fletcher, Agostino Molteni, Rakesh Ponnapureddy, Chirag Patel, Mark Pluym, Alan M Poisner
BACKGROUND: Fat embolism (FE) and the consequent FE syndrome occurring after trauma or surgery can lead to serious pulmonary injury, including ARDS and death. Current treatment of FE syndrome is limited to supportive therapy. We have shown in a rat model that the renin angiotensin system plays a significant role in the pathophysiology of FE because drugs interfering with the renin angiotensin system, captopril and losartan reduce the histopathologic pulmonary damage. The purpose of the current study was to determine if inhibition of renin by aliskiren, an FDA-approved drug for treating hypertension, would produce effective protection in the same model...
February 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28099388/valproic-acid-mitigates-the-inflammatory-response-and-prevents-acute-respiratory-distress-syndrome-in-a-murine-model-of-escherichia-coli-pneumonia-at-the-expense-of-bacterial-clearance
#4
George Kasotakis, Manuel Galvan, Elizabeth King, Beda Sarkar, Arthur Stucchi, Joseph P Mizgerd, Peter A Burke, Daniel Remick
BACKGROUND: Histone deacetylase inhibitors (HDACI) are members of a family of epigenetic modifying agents with broad anti-inflammatory properties. These anti-inflammatory properties may have important therapeutic implications in Acute Respiratory Distress Syndrome (ARDS). However, administration of HDACI may create an immunosuppressive environment conducive to bacterial growth. Accordingly, the aim of the current study is to investigate the effect of HDACI Valproic Acid (VPA) on host inflammatory response and bacterial burden in a murine model of E...
January 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28094846/chronic-drug-induced-effects-on-contractile-motion-properties-and-cardiac-biomarkers-in-human-induced-pluripotent-stem-cell-derived-cardiomyocytes
#5
Ivan Kopljar, An De Bondt, Petra Vinken, Ard Teisman, Bruce Damiano, Nick Goeminne, Ilse Van den Wyngaert, David J Gallacher, Hua Rong Lu
BACKGROUND AND PURPOSE: Risk assessment of chronic cardiac safety liabilities within the pharmaceutical industry is mostly performed during late stages of pre-clinical drug development using in vivo animal models. Here, we explored the potential of human induced pluripotent stem cell-derived cardiomyocytes (hiPS-CMs) to detect chronic cardiac risks such as drug-induced cardiomyocyte toxicity. EXPERIMENTAL APPROACH: Video microscopy-based motion field imaging was applied to evaluate chronic effect (over 72 h) of cardiotoxic drugs on the contractile motion of hiPS-CMs...
January 17, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28090246/bayesian-covariate-selection-in-mixed-effects-models-for-longitudinal-shape-analysis
#6
Prasanna Muralidharan, James Fishbaugh, Eun Young Kim, Hans J Johnson, Jane S Paulsen, Guido Gerig, P Thomas Fletcher
The goal of longitudinal shape analysis is to understand how anatomical shape changes over time, in response to biological processes, including growth, aging, or disease. In many imaging studies, it is also critical to understand how these shape changes are affected by other factors, such as sex, disease diagnosis, IQ, etc. Current approaches to longitudinal shape analysis have focused on modeling age-related shape changes, but have not included the ability to handle covariates. In this paper, we present a novel Bayesian mixed-effects shape model that incorporates simultaneous relationships between longitudinal shape data and multiple predictors or covariates to the model...
April 2016: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/28076685/diffusion-of-evidence-based-intensive-care-unit-organizational-practices-a-state-wide-analysis
#7
Rachel Kohn, Vanessa Madden, Jeremy M Kahn, David A Asch, Amber E Barnato, Scott D Halpern, Meeta Prasad Kerlin
RATIONALE: Several intensive care unit (ICU) organizational practices have been associated with improved patient outcomes. However, the uptake of these evidence-based practices is unknown. OBJECTIVE: To assess diffusion of ICU organizational practices across the state of Pennsylvania. METHODS: We conducted two web-based, cross-sectional surveys of ICU organizational practices in Pennsylvania acute care hospitals, in 2005 (chief nursing officer respondents) and 2014 (ICU nurse manager respondents)...
January 11, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28065731/mechanisms-that-determine-nanocarrier-targeting-to-healthy-versus-inflamed-lung-regions
#8
Jacob S Brenner, Kartik Bhamidipati, Patrick Glassman, N Ramakrishnan, Depeng Jiang, Andrew J Paris, Jacob W Myerson, Daniel C Pan, Vladimir V Shuvaev, Carlos Villa, Elizabeth D Hood, Raisa Kiseleva, Colin F Greineder, Ravi Radhakrishnan, Vladimir R Muzykantov
Inflamed organs display marked spatial heterogeneity of inflammation, with patches of inflamed tissue adjacent to healthy tissue. To investigate how nanocarriers (NCs) distribute between such patches, we created a mouse model that recapitulates the spatial heterogeneity of the inflammatory lung disease ARDS. NCs targeting the epitope PECAM strongly accumulated in the lungs, but were shunted away from inflamed lung regions due to hypoxic vasoconstriction (HVC). In contrast, ICAM-targeted NCs, which had lower whole-lung uptake than PECAM/NCs in inflamed lungs, displayed markedly higher NC levels in inflamed regions than PECAM/NCs, due to increased regional ICAM...
January 5, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28062486/plasma-membrane-wounding-and-repair-in-pulmonary-diseases
#9
Xiaofei Cong, Rolf Dieter Hubmayr, Changgong Li, Xiaoli Zhao
Various pathophysiological conditions such as surfactant dysfunction, mechanical ventilation, inflammation, pathogen products, environmental exposures and gastric acid aspiration stress lung cells and the compromise of plasma membranes occur as a result. The mechanisms necessary for cells to repair plasma membrane defects have been extensively investigated in the last two decades, and some of these key repair mechanisms are also shown to occur following lung cell injury. As it was theorized that lung wounding and repair are involved in the pathogenesis of acute respiratory distress syndrome (ARDS) and idiopathic pulmonary fibrosis (IPF), in this review, we summarized the experimental evidence of lung cell injury in these two devastating syndromes, discuss relevant genetic, physical and biological injury mechanisms, as well as mechanisms utilized by lung cells for cell survival and membrane repair...
January 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28062482/dysregulated-nox4-ubiquitination-contributes-to-redox-imbalance-and-age-related-severity-of-acute-lung-injury
#10
Sunmi Palumbo, Yoon-Joo Shin, Kareem Ahmad, Ankit A Desai, Hector Quijada, Mohamed Mohamed, Adam Knox, Saad Sammani, Brett A Colson, Ting Wang, Joe G N Garcia, Louise Hecker
Acute respiratory distress syndrome (ARDS) is a devastating critical illness disproportionately affecting the elderly population(higher incidence and mortality). The integrity of the lung endothelial cell (EC) monolayer is critical for preservation of lung function. However, mechanisms mediating EC barrier regulation in aging remain unclear. We assessed the severity of acute lung injury (ALI) in young (2 months) and aged (18 months) mice using a two-hit pre-clinical model. Compared to young cohorts, aged mice exhibited increased ALI severity, with greater vascular permeability characterized by elevated albumin influx, levels of bronchoalveolar lavage (BAL) cells (neutrophils) and protein...
January 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28057160/-glabridin-reduces-lipopolysaccharide-induced-lung-injury-in-rats-by-inhibiting-p38-mitogen-activated-protein-kinase-extracellular-regulated-protein-kinases-signaling-pathway
#11
L P Zhang, J G Li
Objective: To investigate whether glabridin has a beneficial effect on lipopolysaccharide (LPS) induced acute respiratory distress syndrome (ARDS) in rats, and to explore the possible underlying mechanisms. Methods: Thirty-two Wistar rats were randomly assigned into control group, model group (LPS group), glabridin group (GLA group), and ulinastatin group (UTI group), with 8 rats in each group. ARDS rat model was reproduced by intraperitoneal injection of LPS (10 mg/kg). The rats in the control group received an equal volume of normal saline at the same times...
December 27, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28051154/therapeutic-effects-of-human-umbilical-cord-derived-mesenchymal-stem-cells-in-acute-lung-injury-mice
#12
Hua Zhu, Yi Xiong, Yunqiu Xia, Rong Zhang, Daiyin Tian, Ting Wang, Jihong Dai, Lijia Wang, Hongbing Yao, Hong Jiang, Ke Yang, Enmei Liu, Yujun Shi, Zhou Fu, Li Gao, Lin Zou
The incidence and mortality of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) are still very high, but stem cells show some promise for its treatment. Here we found that intratracheal administration of human umbilical cord-mesenchymal stem cells (UC-MSCs) significantly improved survival and attenuated the lung inflammation in lipopolysaccharide (LPS)-induced ALI mice. We also used the proteins-chip and bioinformatics to analyze interactions between UC-MSCs treatment and immune-response alternations of ALI mice...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28032130/late-onset-moderate-to-severe-acute-respiratory-distress-syndrome-is-associated-with-shorter-survival-and-higher-mortality-a-two-stage-association-study
#13
Ruyang Zhang, Zhaoxi Wang, Paula Tejera, Angela J Frank, Yongyue Wei, Li Su, Zhaozhong Zhu, Yichen Guo, Feng Chen, Ednan K Bajwa, B Taylor Thompson, David C Christiani
PURPOSE: To evaluate the association between acute respiratory distress syndrome (ARDS) onset time and prognosis. METHODS: Patients with moderate to severe ARDS (N = 876) were randomly assigned into derivation (N = 520) and validation (N = 356) datasets. Both 28-day and 60-day survival times after ARDS onset were analyzed. A data-driven cutoff point between early- and late-onset ARDS was determined on the basis of mortality risk effects of onset times. We estimated the hazard ratio (HR) and odds ratio (OR) of late-onset ARDS using a multivariate Cox proportional hazards model of survival time and a multivariate logistic regression model of mortality rate, respectively...
December 28, 2016: Intensive Care Medicine
https://www.readbyqxmd.com/read/28017906/distensibility-index-of-the-inferior-vena-cava-in-experimental-acute-respiratory-distress-syndrome
#14
R Mendes, M V Oliveira, G A Padilha, R S Santos, N N Rocha, R R Luiz, M G Abreu, P Pelosi, P R M Rocco, P L Silva
We determined the accuracy of distensibility index of inferior vena cava (dIVC) for evaluation of fluid responsiveness in rats with acute respiratory distress syndrome (ARDS) and validated this index for use in rat models. In protocol 1, E. coli lipopolysaccharide was administered in Wistar rats (n=7). After 24h, animals were mechanically ventilated, and stroke volume (SV) and dIVC quantified after blood drainage and subsequent volume expansion (albumin 20%). A receiver operating characteristic (ROC) curve was plotted to determine the optimal dIVC cutoff...
December 23, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28009854/ambulatory-assessment-of-instantaneous-velocity-during-walking-using-inertial-sensor-measurements
#15
Angelo Maria Sabatini, Andrea Mannini
A novel approach for estimating the instantaneous velocity of the pelvis during walking was developed based on Inertial Measurement Units (IMUs). The instantaneous velocity was modeled by the sum of a cyclical component, decomposed in the Medio-Lateral (ML), VerTical (VT) and Antero-Posterior (AP) directions, and the Average Progression Velocity (APV) over each gait cycle. The proposed method required the availability of two IMUs, attached to the pelvis and one shank. Gait cycles were identified from the shank angular velocity; for each cycle, the Fourier series coefficients of the pelvis and shank acceleration signals were computed...
December 21, 2016: Sensors
https://www.readbyqxmd.com/read/28006946/a-novel-experimental-model-of-acute-respiratory-distress-syndrome-in-pig
#16
M Otáhal, M Mlček, I Vítková, O Kittnar
Acute respiratory distress syndrome (ARDS) is severe medical condition occurring in critically ill patients and with mortality of 33-52 % is one of the leading causes of death in critically ill patients. To better understand pathophysiology of ARDS and to verify novel therapeutical approaches a reliable animal model is needed. Therefore we have developed modified lavage model of ARDS in the pig. After premedication (ketamine and midazolam) 35 healthy pigs were anesthetized (propofol, midazolam, morphin, pipecuronium) and orotracheally intubated and ventilated...
December 22, 2016: Physiological Research
https://www.readbyqxmd.com/read/28005404/anti-histone-properties-of-c1-esterase-inhibitor-protect-against-lung-injury
#17
Malgorzata Wygrecka, Djuro Kosanovic, Lukasz Wujak, Katrin Reppe, Ingrid Henneke, Helena Frey, Miroslava Didiasova, Grazyna Kwapiszewska, Leigh M Marsh, Nelli Baal, Holger Hackstein, Dariusz Zakrzewicz, Holger C Müller-Redetzky, Steven de Maat, Coen Maas, Marc W Nolte, Con Panousis, Ralph T Schermuly, Werner Seeger, Martin Witzenrath, Liliana Schaefer, Philipp Markart
RATIONALE: Acute respiratory distress syndrome (ARDS) is characterized by alveolar epithelial cell injury, edema formation, and intraalveolar contact phase activation. OBJECTIVES: To explore whether C1 esterase inhibitor (C1INH), an endogenous inhibitor of the contact phase, may protect from lung injury in vivo and to decipher the possible underlying mechanisms mediating protection. METHODS: The ability of C1INH to control the inflammatory processes was studied in vitro and in vivo...
December 22, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28004376/population-pharmacokinetics-and-pharmacodynamics-modelling-of-dilmapimod-in-severe-trauma-subjects-at-risk-for-acute-respiratory-distress-syndrome
#18
Shuying Yang, Teodora Pene Dumitrescu
INTRODUCTION: Dilmapimod is a potent p38 mitogen-activated protein kinase (MAPK) inhibitor and was investigated in a study (NCT00996840) for its anti-inflammatory effect in non-head injury trauma patients at risk for developing acute respiratory distress syndrome (ARDS). The purpose of this paper is to present the details of the development of a population pharmacokinetic (PK) model, an empirical population placebo response model, and the exploration of a PK/pharmacodynamic (PD) model of dilmapimod...
December 21, 2016: Drugs in R&D
https://www.readbyqxmd.com/read/28004129/statin-therapy-for-acute-respiratory-distress-syndrome-an-individual-patient-data-meta-analysis-of-randomised-clinical-trials
#19
REVIEW
Myura Nagendran, Daniel F McAuley, Peter S Kruger, Laurent Papazian, Jonathon D Truwit, John G Laffey, B Taylor Thompson, Mike Clarke, Anthony C Gordon
PURPOSE: We performed an individual patient data meta-analysis to assess the possible benefits and harms of statin therapy in adults with acute respiratory distress syndrome (ARDS) and to investigate effects in specific ARDS subgroups. METHODS: We identified randomised clinical trials up to 31 October 2016 that had investigated statin therapy versus placebo in patients with ARDS. Individual patient data from each trial were compiled. Conventional two-stage meta-analyses were performed for primary and secondary outcomes, and one-stage regression models with single treatment-covariate interactions for subgroup analyses...
December 21, 2016: Intensive Care Medicine
https://www.readbyqxmd.com/read/27999152/optimizing-peep-by-electrical-impedance-tomography-in-a-porcine-animal-model-of-ards
#20
Nadine Hochhausen, Ingeborg Biener, Rolf Rossaint, Andreas Follmann, Christian Bleilevens, Till Braunschweig, Steffen Leonhardt, Michael Czaplik
BACKGROUND: Mechanical ventilation is necessary in diverse clinical circumstances. Especially in the context of ARDS, so-called protective ventilation strategies must be followed. It is already known that PEEP might enhance oxygenation in ARDS. However, determining the optimal PEEP settings in clinical routines is challenging. Electrical impedance tomography (EIT) is a promising technique with which to adjust ventilator settings. We investigated whether the combination of different EIT parameters, namely the global inhomogeneity and hyperdistension indices, may lead to a feasible and safe PEEP setting...
December 20, 2016: Respiratory Care
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