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https://www.readbyqxmd.com/read/28926576/receptor-for-advanced-glycation-end-products-and-world-trade-center-particulate-induced-lung-function-loss-a-case-cohort-study-and-murine-model-of-acute-particulate-exposure
#1
Erin J Caraher, Sophia Kwon, Syed H Haider, George Crowley, Audrey Lee, Minah Ebrahim, Liqun Zhang, Lung-Chi Chen, Terry Gordon, Mengling Liu, David J Prezant, Ann Marie Schmidt, Anna Nolan
World Trade Center-particulate matter(WTC-PM) exposure and metabolic-risk are associated with WTC-Lung Injury(WTC-LI). The receptor for advanced glycation end-products (RAGE) is most highly expressed in the lung, mediates metabolic risk, and single-nucleotide polymorphisms at the AGER-locus predict forced expiratory volume(FEV). Our objectives were to test the hypotheses that RAGE is a biomarker of WTC-LI in the FDNY-cohort and that loss of RAGE in a murine model would protect against acute PM-induced lung disease...
2017: PloS One
https://www.readbyqxmd.com/read/28920463/evaluation-of-genotoxicity-and-subchronic-toxicity-of-standardized-rose-hip-extract
#2
A Nagatomo, M Oguri, N Nishida, M Ogawa, A Ichikawa, Y Tanaka-Azuma
Rose hip is the fruit of the rose plant, which is widely used in food, cosmetics and as a traditional medicine. Therefore, rose hip is considered safe and has a sufficient history of consumption as food. However, few studies have reported on the safety of rose hip extracts in toxicological analyses. Thus, to evaluate the safety of rosehip polyphenol MJ (RHPMJ), an aqueous ethanol extract standardized with the trans-tiliroside content, we performed genotoxicity and 90-day repeated oral dose toxicity studies in compliance with the Organisation for Economic Co-operation and Development-Good Laboratory Practice...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28912380/exposure-of-neonatal-mice-to-bromine-impairs-their-alveolar-development-and-lung-function
#3
Tamas Jilling, Changchun Ren, Aaron Jefthy Yee, Saurabh Aggarwal, Brian Halloran, Namasivayam Ambalavanan, Sadis Matalon
The halogen bromine (Br2) is used extensively in industry and stored and transported in large quantities. Its accidental or malicious release into the atmosphere has resulted in significant casualties. The pathophysiology of Br2-induced lung injury has been studied in adult animals, but the consequences of Br2 exposure to the developing lung are completely unknown. We exposed neonatal mouse littermates on postnatal day 3 (P3) to either Br2 at 400 ppm for 30 minutes (400/30), to Br2 at 600 ppm for 30 minutes (600/30), or to room air, then returned them to their dams and observed until P14...
September 14, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28910340/successful-1-1-proportion-ventilation-with-a-unique-device-for-independent-lung-ventilation-using-a-double-lumen-tube-without-complications-in-the-supine-and-lateral-decubitus-positions-a-pilot-study
#4
Michał Kowalczyk, Sławomir Sawulski, Wojciech Dąbrowski, Luiza Grzycka-Kowalczyk, Edyta Kotlińska-Hasiec, Agnieszka Wrońska-Sewruk, Artur Florek, Rafał Rutyna
INTRODUCTION: Adequate blood oxygenation and ventilation/perfusion matching should be main goal of anaesthetic and intensive care management. At present, one of the methods of improving gas exchange restricted by ventilation/perfusion mismatching is independent ventilation with two ventilators. Recently, however, a unique device has been developed, enabling ventilation of independent lungs in 1:1, 2:1, 3:1, and 5:1 proportions. The main goal of the study was to evaluate the device's utility, precision and impact on pulmonary mechanics...
2017: PloS One
https://www.readbyqxmd.com/read/28904482/mathematics-of-ventilator-induced-lung-injury
#5
REVIEW
Ubaidur Rahaman
Ventilator-induced lung injury (VILI) results from mechanical disruption of blood-gas barrier and consequent edema and releases of inflammatory mediators. A transpulmonary pressure (PL) of 17 cmH2O increases baby lung volume to its anatomical limit, predisposing to VILI. Viscoelastic property of lung makes pulmonary mechanics time dependent so that stress (PL) increases with respiratory rate. Alveolar inhomogeneity in acute respiratory distress syndrome acts as a stress riser, multiplying global stress at regional level experienced by baby lung...
August 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28893857/changes-in-dynamic-lung-mechanics-after-lung-volume-reduction-coil-treatment-of-severe-emphysema
#6
Demosthenes Makris, Sylvie Leroy, Johana Pradelli, Jonathan Benzaquen, Hervé Guenard, Jeanne-Marie Perotin, Spyros Zakynthinos, Epaminondas Zakynthinos, Gaëtan Deslee, Charles Hugo Marquette
We assessed the relationships between changes in lung compliance, lung volumes and dynamic hyperinflation in patients with emphysema who underwent bronchoscopic treatment with nitinol coils (coil treatment) (n=11) or received usual care (UC) (n=11). Compared with UC, coil treatment resulted in decreased dynamic lung compliance (CLdyn) (p=0.03) and increased endurance time (p=0.010). The change in CLdyn was associated with significant improvement in FEV1 and FVC, with reduction in residual volume and intrinsic positive end-expiratory pressure, and with increased inspiratory capacity at rest/and at exercise...
September 11, 2017: Thorax
https://www.readbyqxmd.com/read/28875324/-extreme-obesity-particular-aspect-of-invasive-and-noninvasive-ventilation
#7
REVIEW
M Deppe, P Lebiedz
The obesity rate is increasing worldwide and the percentage of obese patients in the intensive care unit (ICU) is rising concomitantly. Ventilatory support strategies in obese patients must take into account the altered pathophysiological conditions. Unfortunately, prospective randomized multicenter trials on this subject are lacking. Therefore, current strategies are based on the individual experiences of ICU physicians and single-center studies. Noninvasive ventilation (NIV) in critically ill patients with acute respiratory failure and obesity hypoventilation syndrome (OHS) is an efficient treatment option and should be provided as early as possible is an effort to avoid intubation...
September 5, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28872540/effects-on-pulmonary-vascular-mechanics-of-two-different-lung-protective-ventilation-strategies-in-an-experimental-model-of-acute-respiratory-distress-syndrome
#8
Arnoldo Santos, Eva Gomez-Peñalver, M Ignacio Monge-Garcia, Jaime Retamal, João Batista Borges, Gerardo Tusman, Goran Hedenstierna, Anders Larsson, Fernando Suarez-Sipmann
OBJECTIVES: To compare the effects of two lung-protective ventilation strategies on pulmonary vascular mechanics in early acute respiratory distress syndrome. DESIGN: Experimental study. SETTING: University animal research laboratory. SUBJECTS: Twelve pigs (30.8 ± 2.5 kg). INTERVENTIONS: Acute respiratory distress syndrome was induced by repeated lung lavages and injurious mechanical ventilation...
September 1, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28866134/wnt-%C3%AE-catenin-signaling-links-embryonic-lung-development-and-asthmatic-airway-remodeling
#9
REVIEW
Musaddique Hussain, Chengyun Xu, Meiping Lu, Xiling Wu, Lanfang Tang, Ximei Wu
Embryonic lung development requires reciprocal endodermal-mesodermal interactions; mediated by various signaling proteins. Wnt/β-catenin is a signaling protein that exhibits the pivotal role in lung development, injury and repair while aberrant expression of Wnt/β-catenin signaling leads to asthmatic airway remodeling: characterized by hyperplasia and hypertrophy of airway smooth muscle cells, alveolar and vascular damage goblet cells metaplasia, and deposition of extracellular matrix; resulting in decreased lung compliance and increased airway resistance...
August 30, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28860142/novel-therapeutic-roles-for-surfactant-inositols-and-phosphatidylglycerols-in-a-neonatal-piglet-ards-model-a-translational-study
#10
Dietmar Spengler, Supandi Winoto-Morbach, Sarah Kupsch, Christina Vock, Katharina Blöchle, Susanna Frank, Nele Rintz, Marie Diekötter, Harshavardhan Janga, Markus Weckmann, Sabine Fuchs, Andra B Schromm, Heinz Fehrenbach, Stefan Schütze, Martin F Krause
The biological and immune-protective properties of surfactant-derived phospholipids and phospholipid-subfractions in the context of neonatal inflammatory lung disease are widely unknown. Using a porcine neonatal triple-hit ARDS model (repeated airway lavage, overventilation, LPS instillation into airways), we assessed whether the supplementation of surfactant (poractant alfa, S) with inositol-derivatives (inositol-1,2,6-trisphosphate, IP3; phosphatidylinositol-3,5-bisphosphate, PIP2) or phosphatidylglycerol-subfractions (16:0/18:1-POPG; 18:1/18:1-DOPG) would result in improved clinical parameters, and sought to characterize changes in key inflammatory pathways behind these improvements...
August 31, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28857852/effects-of-high-flow-nasal-cannula-on-the-work-of-breathing-in-patients-recovering-from-acute-respiratory-failure
#11
Mathieu Delorme, Pierre-Alexandre Bouchard, Mathieu Simon, Serge Simard, François Lellouche
OBJECTIVES: High-flow nasal cannula is increasingly used in the management of respiratory failure. However, little is known about its impact on respiratory effort, which could explain part of the benefits in terms of comfort and efficiency. This study was designed to assess the effects of high-flow nasal cannula on indexes of respiratory effort (i.e., esophageal pressure variations, esophageal pressure-time product/min, and work of breathing/min) in adults. DESIGN: A randomized controlled crossover study was conducted in 12 patients with moderate respiratory distress (i...
August 28, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28857356/different-predictivity-of-fluid-responsiveness-by-pulse-pressure-variation-in-children-after-surgical-repair-of-ventricular-septal-defect-or-tetralogy-of-fallot
#12
Ding Han, Shoudong Pan, Xiaonan Wang, Qingyan Jia, Yi Luo, Jia Li, Chuan Ou-Yang
BACKGROUND: Pulse pressure variation derived from the varied pulse contour method is based on heart-lung interaction during mechanical ventilation. It has been shown that pulse pressure variation is predictive of fluid responsiveness in children undergoing surgical repair of ventricular septal defect. Right ventricle compliance and pulmonary vascular capacitance in children with tetralogy of Fallot are underdeveloped as compared to those in ventricular septal defect. We hypothesized that the difference in the right ventricle-pulmonary circulation in the two groups of children would affect the heart-lung interaction and therefore pulse pressure variation predictivity of fluid responsiveness following cardiac surgery...
August 31, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28851245/pharmacoeconomic-analysis-for-pemetrexed-as-a-maintenance-therapy-for-nsclc-patients-with-patient-assistance-program-in-china
#13
Yongji Lu, Ji Cheng, Ziyi Lin, Yuan Chen, Jianwei Xuan
OBJECTIVE: This study is to evaluate the costs, clinical efficacy, and social benefits of a patient assistance program (PAP) implemented by the China Primary Healthcare Foundation for the use of pemetrexed as a first-line non-squamous non-small cell lung cancer (NSCLC) maintenance therapy in China. METHODS: A survival analysis was conducted on the clinical data of 1,366 patients who participated in the PAP. The progression-free survival (PFS) and median maintenance treatment cycle of pemetrexed were analyzed...
September 13, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28846719/aging-effects-on-airflow-dynamics-and-lung-function-in-human-bronchioles
#14
JongWon Kim, Rebecca L Heise, Angela M Reynolds, Ramana M Pidaparti
BACKGROUND AND OBJECTIVE: The mortality rate for patients requiring mechanical ventilation is about 35% and this rate increases to about 53% for the elderly. In general, with increasing age, the dynamic lung function and respiratory mechanics are compromised, and several experiments are being conducted to estimate these changes and understand the underlying mechanisms to better treat elderly patients. MATERIALS AND METHODS: Human tracheobronchial (G1 ~ G9), bronchioles (G10 ~ G22) and alveolar sacs (G23) geometric models were developed based on reported anatomical dimensions for a 50 and an 80-year-old subject...
2017: PloS One
https://www.readbyqxmd.com/read/28846571/pulmonary-mechanics-and-mortality-in-mechanically-ventilated-patients-without-acute-respiratory-distress-syndrome-a-cohort-study
#15
Brian M Fuller, David Page, Robert J Stephens, Brian W Roberts, Anne M Drewry, Enyo Ablordeppey, Nicholas M Mohr, Marin H Kollef
BACKGROUND: Driving pressure has been proposed as a major determinant of outcome in patients with acute respiratory distress syndrome (ARDS), but there is little data examining the association between pulmonary mechanics, include driving pressure, and outcomes in mechanically ventilated patients without ARDS. METHODS: Secondary analysis from 1,705 mechanically ventilated patients enrolled in a clinical study that examined outcomes associated with the use of early lung-protective mechanical ventilation...
August 25, 2017: Shock
https://www.readbyqxmd.com/read/28839101/hyperoxia-treatment-of-trek-1-trek-2-traak-deficient-mice-is-associated-with-a-reduction-in-surfactant-proteins
#16
Andreas Schwingshackl, Benjamin Lopez, Bin Teng, Charlean L Luellen, Florian Lesage, John Belperio, Riccardo Olcese, Christopher M Waters
We previously proposed a role for the 2-pore domain potassium (K2P) channel TREK-1 in hyperoxia (HO)-induced lung injury. To determine whether redundancy between the 3 TREK isoforms (TREK-1, TREK-2, TRAAK) could protect from HO-induced injury, we now examined the effect of deletion of all 3 TREK isoforms in a clinically relevant scenario of prolonged HO exposure and mechanical ventilation (MV). We exposed WT and TREK-1/TREK-2/TRAAK-deficient (triple ko) mice to either room air, 72 hours HO, MV (high and low tidal volume), or a combination of HO+MV, and measured quasi-static lung compliance, BAL protein concentration, histologic lung injury scores (LIS), cellular apoptosis, and cytokine levels...
August 24, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28831038/caesarean-section-is-associated-with-reduced-perinatal-cytokine-response-increased-risk-of-bacterial-colonization-in-the-airway-and-infantile-wheezing
#17
Sui-Ling Liao, Ming-Han Tsai, Tsung-Chieh Yao, Man-Chin Hua, Kuo-Wei Yeh, Chih-Yung Chiu, Kuan-Wen Su, Shih-Yin Huang, Chuan-Chi Kao, Shen-Hao Lai, Jing-Long Huang
The relationship between cesarean section (CS) and allergic disorders such as asthma and wheezing has been inconsistent, and the mechanisms for their connection remained largely unknown. We aimed to investigate whether CS is associated with infantile wheeze and to explore the connection between CS and several risk factors known to correlate with allergy development. Mononuclear cells were isolated from cord blood and assessed for cytokine responses by ELISA. Bacteria from nasopharyngeal specimens were identified with traditional culture methods...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28830928/evaluation-of-simulated-ventilation-techniques-with-the-upright-and-conventional-self-inflating-neonatal-resuscitators
#18
Indira Narayanan, Marvesh Mendhi, Pooja Bansil, Patricia S Coffey
BACKGROUND: The study assessed the impact of simulated ventilation techniques using upright and conventional self-inflating neonatal resuscitators on delivered tidal volume (VT) and pressure. METHODS: We analyzed videos of participants ventilating a manikin using an upright (upright, n = 33) and a conventional resuscitator (conventional, n = 32) under normal and low lung compliance. Mask hold, number of fingers squeezing the bag, and degree of bag squeeze were compared with VT and peak inspiratory pressure (PIP)...
August 22, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28828363/positive-end-expiratory-pressure-how-to-set-it-at-the-individual-level
#19
REVIEW
Luciano Gattinoni, Francesca Collino, Giorgia Maiolo, Francesca Rapetti, Federica Romitti, Tommaso Tonetti, Francesco Vasques, Michael Quintel
The positive end-expiratory pressure (PEEP), since its introduction in the treatment of acute respiratory failure, up to the 1980s was uniquely aimed to provide a viable oxygenation. Since the first application, a large debate about the criteria for selecting the PEEP levels arose within the scientific community. Lung mechanics, oxygen transport, venous admixture thresholds were all proposed, leading to PEEP recommendations from 5 up to 25 cmH2O. Throughout this period, the main concern was the hemodynamics...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28828360/transpulmonary-pressure-importance-and-limits
#20
REVIEW
Domenico Luca Grieco, Lu Chen, Laurent Brochard
Transpulmonary pressure (PL) is computed as the difference between airway pressure and pleural pressure and separates the pressure delivered to the lung from the one acting on chest wall and abdomen. Pleural pressure is measured as esophageal pressure (PES) through dedicated catheters provided with esophageal balloons. We discuss the role of PL in assessing the effects of mechanical ventilation in patients with acute respiratory distress syndrome (ARDS). In the supine position, directly measured PL represents the pressure acting on the alveoli and airways...
July 2017: Annals of Translational Medicine
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