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Normal lung physiology

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https://www.readbyqxmd.com/read/27899395/functional-definition-of-progenitors-versus-mature-endothelial-cells-reveals-key-soxf-dependent-differentiation-process
#1
Jatin Patel, Elke J Seppanen, Mathieu P Rodero, Ho Yi Wong, Prudence Donovan, Zoltan Neufeld, Nicholas M Fisk, Mathias François, Kiarash Khosrotehrani
BACKGROUND: -During adult life, blood vessel formation is thought to occur via angiogenic processes involving branching from existing vessels. An alternate proposal suggests that neo-vessels form from endothelial progenitors able to assemble the intimal layers. We here aimed to define vessel-resident endothelial progenitors in vivo in a variety of tissues in physiological and pathological situations such as normal aorta, lungs, as well as wound healing, tumors and placenta. METHODS: -Based on protein expression levels of common endothelial markers using flow cytometry, three sub-populations of endothelial cells could be identified among VE-Cadherin+ and CD45- cells...
November 29, 2016: Circulation
https://www.readbyqxmd.com/read/27894999/matched-comparative-modeling-of-normal-and-diseased-human-airway-responses-using-a-microengineered-breathing-lung-chip
#2
Kambez H Benam, Richard Novak, Janna Nawroth, Mariko Hirano-Kobayashi, Thomas C Ferrante, Youngjae Choe, Rachelle Prantil-Baun, James C Weaver, Anthony Bahinski, Kevin K Parker, Donald E Ingber
Smoking represents a major risk factor for chronic obstructive pulmonary disease (COPD), but it is difficult to characterize smoke-induced injury responses under physiological breathing conditions in humans due to patient-to-patient variability. Here, we show that a small airway-on-a-chip device lined by living human bronchiolar epithelium from normal or COPD patients can be connected to an instrument that "breathes" whole cigarette smoke in and out of the chips to study smoke-induced pathophysiology in vitro...
November 23, 2016: Cell Systems
https://www.readbyqxmd.com/read/27882640/physiological-markers-of-exercise-capacity-and-lung-disease-severity-in-cystic-fibrosis
#3
Laurie Smith, Charles C Reilly, Victoria MacBean, Caroline J Jolley, Caroline Elston, John Moxham, Gerrard F Rafferty
BACKGROUND AND OBJECTIVE: Peak aerobic capacity (VO2 peak) is an important outcome measure in cystic fibrosis (CF), but measurement is not widely available and can be influenced by patient motivation, pain and fatigue. Alternative markers of disease severity would be helpful. Neural respiratory drive, measured using parasternal intercostal muscle electromyography (EMGpara), reflects the load to capacity balance of the respiratory system and provides a composite measure of pulmonary function impairment in CF...
November 24, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/27879258/nucleophosmin-anaplastic-lymphoma-kinase-npm-alk-the-ultimate-oncogene-and-therapeutic-target
#4
Michael T Werner, Chen Zhao, Qian Zhang, Mariusz A Wasik
Anaplastic lymphoma kinase (ALK) is a receptor tyrosine kinase physiologically expressed by fetal neural cells. However, aberrantly expressed ALK is involved in the pathogenesis of diverse malignancies including distinct types of lymphoma, lung carcinoma, and neuroblastoma. The aberrant ALK expression in non-neural cells results from chromosomal translocations that create novel fusion proteins. These protein hybrids are comprised of the proximal part of a partner gene including its promoter region and the distal part of ALK including coding sequence for the entire kinase domain...
November 22, 2016: Blood
https://www.readbyqxmd.com/read/27865240/prediction-equations-for-spirometry-in-adults-in-western-india
#5
Unnati Desai, Jyotsna M Joshi, S K Chhabra, Mujeeb-Ur Rahman
BACKGROUND: Spirometry is an essential investigation in pulmonology. The predicted normal spirometry values depend on various physiological parameters. This study was conducted to collect updated information on pulmonary functions in normal adults from western India. MATERIAL AND METHODS: A prospective observational study was undertaken at a tertiary hospital in Mumbai enrolling healthy subjects, 18-75 years, with ethnic origin from western India. Spirometry measurements were carried out as per ATS/ERS-2005 guidelines using a non-heated Fleish Pneumotachograph spirometer...
July 2016: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/27861245/selective-impairment-of-blood-pressure-reduction-by-endothelial-nitric-oxide-synthase-dimer-destabilization-in-mice
#6
Tatsiana Suvorava, Stephanie Pick, Georg Kojda
OBJECTIVES: Endothelial dysfunction and oxidative stress are associated with hypertension but whether endothelial superoxide may play a role in the early development of essential hypertension remains uncertain. We investigated whether endothelial nitric oxide synthase (eNOS)-derived endothelial oxidative stress is involved in the regulation of SBP. METHODS: Wild-type eNOS [mice with endothelium-specific overexpression of bovine endothelial NO-synthase (eNOS-Tg)] or a novel dimer-destabilized eNOS-mutant harboring a partially disrupted zinc-finger [mice with endothelium-specific overexpression of destabilized bovine eNOS destabilized by replacement of Cys 101 to Ala (C101A-eNOS-Tg)] was introduced in C57BL/6 in an endothelial-specific manner...
January 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27834785/physiological-effects-of-a%C3%A2-single-chest-physiotherapy-session-in-mechanically-ventilated-and-extubated-preterm-neonates
#7
Y Mehta, J Shetye, R Nanavati, A Mehta
OBJECTIVE: To assess the changes on various physiological cardio-respiratory parameters with a single chest physiotherapy session in mechanically ventilated and extubated preterm neonates with respiratory distress syndrome. STUDY DESIGN: This is a prospective observational study in neonatal intensive care unit setting. Sixty preterm neonates with respiratory distress syndrome, thirty mechanically ventilated and thirty extubated preterm neonates requiring chest physiotherapy were enrolled in the study...
November 9, 2016: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/27830194/effect-of-high-fat-diet-on-pulmonary-expression-of-parathyroid-hormone-related-protein-and-its-downstream-targets
#8
Learta Oruqaj, Svenja Forst, Rolf Schreckenberg, Javier Inserte, Marcos Poncelas, Jordi Bañeras, David Garcia-Dorado, Susanne Rohrbach, Klaus-Dieter Schlüter
AIMS: Parathyroid hormone-related protein (PTHrP) is involved in lung development and surfactant production. The latter one requires a paracrine interaction between type II alveolar cells and lipofibroblasts in which leptin triggers PTHrP-induced effects. Whether increased plasma leptin levels, as they occur in high fat diet, modify the expression of PTHrP remains unclear. Furthermore, the effect of high fat diet under conditions of forced pulmonary remodelling such as response to post myocardial infarction remains to be defined...
October 2016: Heliyon
https://www.readbyqxmd.com/read/27812019/measurement-of-in-plane-elasticity-of-live-cell-layers-using-a-pressure-sensor-embedded-microfluidic-device
#9
Chien-Han Lin, Chien-Kai Wang, Yu-An Chen, Chien-Chung Peng, Wei-Hao Liao, Yi-Chung Tung
In various physiological activities, cells experience stresses along their in-plane direction when facing substrate deformation. Capability of continuous monitoring elasticity of live cell layers during a period is highly desired to investigate cell property variation during various transformations under normal or disease states. This paper reports time-lapsed measurement of live cell layer in-plane elasticity using a pressure sensor embedded microfluidic device. The sensor converts pressure-induced deformation of a flexible membrane to electrical signals...
November 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27810998/postnatal-deletion-of-podoplanin-in-lymphatic-endothelium-results-in-blood-filling-of-the-lymphatic-system-and-impairs-dendritic-cell-migration-to-lymph-nodes
#10
Roberta Bianchi, Erica Russo, Samia B Bachmann, Steven T Proulx, Marko Sesartic, Nora Smaadahl, Steve P Watson, Christopher D Buckley, Cornelia Halin, Michael Detmar
OBJECTIVE: The lymphatic vascular system exerts major physiological functions in the transport of interstitial fluid from peripheral tissues back to the blood circulation and in the trafficking of immune cells to lymph nodes. Previous studies in global constitutive knockout mice for the lymphatic transmembrane molecule podoplanin reported perinatal lethality and a complex phenotype with lung abnormalities, cardiac defects, lymphedema, blood-filled lymphatic vessels, and lack of lymph node organization, reflecting the importance of podoplanin expression not only by the lymphatic endothelium but also by a variety of nonendothelial cell types...
November 3, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27796509/lung-remodeling-associated-with-recovery-from-acute-lung-injury
#11
REVIEW
Sean E Gill, Cory M Yamashita, Ruud A W Veldhuizen
Acute respiratory distress syndrome (ARDS) is a disease with a variety of causes and is defined by severe hypoxemia. Whereas ARDS carries a mortality of approximately 30 %, patients that survive may ultimately regain near normal pulmonary physiology. The critical pathophysiological processes in ARDS are alveolar barrier dysfunction and overwhelming inflammation. This encompasses damage to the epithelial and endothelial layers, thickening of the interstitial matrix, edema with inactivation of pulmonary surfactant at the alveolar surface and marked inflammation mediated by infiltrating neutrophils and pro-inflammatory macrophages...
October 29, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27788581/environmental-tobacco-smoke-alters-metabolic-systems-in-adult-rats
#12
Dinesh Kumar Barupal, Kent E Pinkerton, Carol Hood, Tobias Kind, Oliver Fiehn
Human exposure to environmental tobacco smoke (ETS) is associated with an increased incidence of pulmonary and cardiovascular disease and possibly lung cancer. Metabolomics can reveal changes in metabolic networks in organisms under different physio-pathological conditions. Our objective was to identify spatial and temporal metabolic alterations with acute and repeated subchronic ETS exposure to understand mechanisms by which ETS exposure may cause adverse physiological and structural changes in the pulmonary and cardiovascular systems...
October 28, 2016: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/27773852/u-biopred-clinical-adult-asthma-clusters-linked-to-a-subset-of-sputum-omics
#13
Diane Lefaudeux, Bertrand De Meulder, Matthew J Loza, Nancy Peffer, Anthony Rowe, Frédéric Baribaud, Aruna T Bansal, Rene Lutter, Ana R Sousa, Julie Corfield, Ioannis Pandis, Per S Bakke, Massimo Caruso, Pascal Chanez, Sven-Erik Dahlén, Louise J Fleming, Stephen J Fowler, Ildiko Horvath, Norbert Krug, Paolo Montuschi, Marek Sanak, Thomas Sandstrom, Dominic E Shaw, Florian Singer, Peter J Sterk, Graham Roberts, Ian M Adcock, Ratko Djukanovic, Charles Auffray, Kian F Chung
BACKGROUND: Asthma is a heterogeneous disease in which there is a differential response to asthma treatments. This heterogeneity needs to be evaluated so that a personalised management approach can be provided. OBJECTIVES: We stratified patients with moderate-to-severe asthma based on clinico-physiological parameters and performed an -omics analysis of sputum. METHODS: Partition-around-medoid clustering was applied to a training set of 266 asthma participants from the European U-BIOPRED adult cohort using 8 pre-specified clinic-physiological variables...
October 20, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27767347/idiopathic-pulmonary-fibrosis-adaptive-multiple-features-method-fibrosis-association-with-outcomes
#14
Margaret L Salisbury, David A Lynch, Edwin J R van Beek, Ella A Kazerooni, Junfeng Guo, Meng Xia, Susan Murray, Kevin J Anstrom, Eric Yow, Fernando J Martinez, Eric A Hoffman, Kevin R Flaherty
RATIONALE: Adaptive Multiple Features Method (AMFM) lung texture analysis software recognizes high-resolution computed tomography (HRCT) patterns. OBJECTIVES: We evaluated AMFM and visual quantification of HRCT patterns and their relationship with disease progression in Idiopathic Pulmonary Fibrosis. METHODS: IPF patients in a clinical trial of prednisone, azathioprine, and N-acetylcysteine underwent HRCT at study start and finish. Proportion of lung occupied by ground glass, ground glass-reticular (GGR), honeycombing, emphysema, and normal were measured by AMFM and 3 radiologists, documenting baseline disease extent and post-baseline change...
October 21, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27765860/microarray-studies-on-211at-administration-in-balb-c-nude-mice-indicate-systemic-effects-on-transcriptional-regulation-in-non-thyroid-tissues
#15
Britta Langen, Nils Rudqvist, Khalil Helou, Eva B Forssell-Aronsson
INTRODUCTION: Targeted α-therapy is a promising treatment option for various types of malignant tumors. Radiolabeled cancer-seeking agents, however, undergo degradation resulting in a certain percentage of free radionuclide in the body. The radiohalogen (211)At accumulates in various tissues with specifically high uptake in the thyroid. When normal thyroid function is disturbed due to ionizing radiation (IR) exposure, deleterious effects can occur in tissues that depend on thyroid hormone (TH) regulation for normal physiological function...
October 20, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27739872/the-clinical-significance-of-collateral-ventilation
#16
Peter B Terry, Richard J Traystman
Oxygen delivery and carbon dioxide removal being critical to cell survival, mammals have developed collateral vascular and ventilation systems to ensure tissue viability. Collateral ventilation, defined as ventilation of alveoli via pathways that bypass normal airways, is present in humans and many other species. The presence of collateral ventilation can be beneficial in certain disease states, while its relative absence can predispose to other diseases. These well defined anatomical pathways contribute little to ventilation in normal humans, but modulate ventilation perfusion imbalance in a variety of diseases including obstructive diseases such as asthma and emphysema...
October 14, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27703346/inhaled-corticosteroid-normalizes-some-but-not-all-airway-vascular-remodeling-in-copd
#17
Amir Soltani, Eugene Haydn Walters, David W Reid, Shakti Dhar Shukla, Kaosia Nowrin, Chris Ward, H Konrad Muller, Sukhwinder Singh Sohal
BACKGROUND: This study assessed the effects of inhaled corticosteroid (ICS) on airway vascular remodeling in chronic obstructive pulmonary disease (COPD). METHODS: Thirty-four subjects with mild-to-moderate COPD were randomly allocated 2:1 to ICS or placebo treatment in a double-blinded clinical trial over 6 months. Available tissue was compared before and after treatment for vessel density, and expression of VEGF, TGF-β1, and TGF-β1-related phosphorylated transcription factors p-SMAD 2/3...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27701165/lung-ultrasound-pattern-is-normal-during-the-last-gestational-weeks-an-observational-pilot-study
#18
Erik Arbeid, Alessio Demi, Etrusca Brogi, Elisa Gori, Teresa Giusto, Gino Soldati, Luigi Vetrugno, Francesco Giunta, Francesco Forfori
BACKGROUND/AIMS: The normal lung ultrasound (US) pattern during a regular pregnancy has not been evaluated extensively in the current literature. Pregnancy-related changes in the respiratory tract affect maternal predisposition to several respiratory complications; consequently, it is important to differentiate between a physiologic pattern during pregnancy and a pathologic lung pattern, due to respiratory failure. The goal of our study was to assess the normal US lung pattern in women without known comorbidities in the last weeks of pregnancy...
October 5, 2016: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/27688737/the-effect-of-inhalation-of-citrus-sinensis-flowers-and-mentha-spicata-leave-essential-oils-on-lung-function-and-exercise-performance-a-quasi-experimental-uncontrolled-before-and-after-study
#19
Nidal Amin Jaradat, Hamzeh Al Zabadi, Belal Rahhal, Azmi Mahmoud Ali Hussein, Jamal Shaker Mahmoud, Basel Mansour, Ahmad Ibrahim Khasati, Abdelkhaleq Issa
BACKGROUND: Recently, there has been an increased interest in the effects of essential oils on athletic performances and other physiological effects. This study aimed to assess the effects of Citrus sinensis flower and Mentha spicata leaves essential oils inhalation in two different groups of athlete male students on their exercise performance and lung function. METHODS: Twenty physical education students volunteered to participate in the study. The subjects were randomly assigned into two groups: Mentha spicata and Citrus sinensis (ten participants each)...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27688627/association-of-serum-interleukin-6-interleukin-8-and-acute-physiology-and-chronic-health-evaluation-ii-score-with-clinical-outcome-in-patients-with-acute-respiratory-distress-syndrome
#20
Deme Swaroopa, Kakarla Bhaskar, T Mahathi, Shivakrishna Katkam, Y Satyanarayana Raju, Naval Chandra, Vijay Kumar Kutala
BACKGROUND AND AIM: Studies on potential biomarkers in experimental models of acute lung injury (ALI) and clinical samples from patients with ALI have provided evidence to the pathophysiology of the mechanisms of lung injury and predictor of clinical outcome. Because of the high mortality and substantial variability in outcomes in patients with acute respiratory distress syndrome (ARDS), identification of biomarkers such as cytokines is important to determine prognosis and guide clinical decision-making...
September 2016: Indian Journal of Critical Care Medicine
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