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Lung surfactant

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https://www.readbyqxmd.com/read/28653505/development-of-kras-mutant-lung-adenocarcinoma-in-mice-with-knockout-of-the-airway-lineage-specific-gene-gprc5a
#1
Junya Fujimoto, Sayuri Nunomura-Nakamura, Yihua Liu, Wenhua Lang, Tina McDowell, Yasminka Jakubek, Dalia Ezzeddine, Joshua Kapere Ochieng, Jason Petersen, Gareth Davies, Junya Fukuoka, Ignacio I Wistuba, Erik Ehli, Jerry Fowler, Paul Scheet, Humam Kadara
Despite the urgency for prevention and treatment of lung adenocarcinoma (LUAD), we still do not know drivers in pathogenesis of the disease. Earlier work revealed that mice with knockout of the G-protein coupled receptor Gprc5a develop late onset lung tumors including LUADs. Here, we sought to further probe the impact of Gprc5a expression on LUAD pathogenesis. We first surveyed GPRC5A expression in human tissues and found that GPRC5A was markedly elevated in human normal lung relative to other normal tissues and was consistently down-regulated in LUADs...
June 27, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28653135/closed-loop-mechanical-ventilation-for-lung-injury-a-novel-physiological-feedback-mode-following-the-principles-of-the-open-lung-concept
#2
David Schwaiberger, Philipp A Pickerodt, Anake Pomprapa, Onno Tjarks, Felix Kork, Willehad Boemke, Roland C E Francis, Steffen Leonhardt, Burkhard Lachmann
Adherence to low tidal volume (VT) ventilation and selected positive end-expiratory pressures are low during mechanical ventilation for treatment of the acute respiratory distress syndrome. Using a pig model of severe lung injury, we tested the feasibility and physiological responses to a novel fully closed-loop mechanical ventilation algorithm based on the "open lung" concept. Lung injury was induced by surfactant washout in pigs (n = 8). Animals were ventilated following the principles of the "open lung approach" (OLA) using a fully closed-loop physiological feedback algorithm for mechanical ventilation...
June 26, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28651962/fatty-acid-composition-of-free-living-and-parasitic-stages-of-the-bovine-lungworm-dictyocaulus-viviparus
#3
Ann-Christin Becker, Ina Willenberg, Andrea Springer, Nils Helge Schebb, Pablo Steinberg, Christina Strube
The development of parasitic nematodes proceeds via multiple stages, often implicating the necessity to adapt to different environments. Especially the transition from free-living to parasitic stages is accompanied by a significant change in the environmental conditions. To shed light on possible adaptations to these transitions, the fatty acid composition of different developmental stages of the bovine lungworm Dictyocaulus viviparus was investigated. Fatty acids of D. viviparus eggs, the free-living first, second and third larval stage (L1-L3) as well as the parasitic preadult stage and adult male and female worms residing in the lungs of infected hosts were quantified by gas chromatography after transesterification to their fatty acid methyl esters...
June 23, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28651937/postnatal-steroids-in-extreme-preterm-infants-intra-tracheal-instillation-using-surfactant-as-a-vehicle
#4
REVIEW
L Boel, S Banerjee, M Chakraborty
Chronic Lung Disease (CLD) is a common respiratory morbidity in survivors following extreme preterm birth, and is associated with adverse neurodevelopment in the long term. Besides demographics, multiple risk factors are implicated in the pathogenesis of CLD. However, early lung inflammation appears to be the common pathway that leads to the pathological and clinical changes observed in CLD. Postnatal use of systemic steroids has been successful in reducing the incidence of CLD but resulted in unacceptable adverse neurodevelopmental outcomes...
May 31, 2017: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28651332/surfactant-protein-d-is-not-so-friendly-outside-the-lung-aggravation-of-cardiovascular-disease
#5
Grith L Sorensen
No abstract text is available yet for this article.
June 23, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28651195/stereological-and-biophysical-characteristics-of-the-ovine-surfactant-system-and-its-changes-caused-by-ovine-pulmonary-adenocarcinoma
#6
Ariane Jörger, Christa Acevedo, Diana Busley, Martin Ganter, Andreas Schmiedl, Esther Humann-Ziehank
Surfactant covers the inner surface of lung alveoli and lowers the surface tension to prevent alveoli from collapsing. A lack of surfactant or its dysfunction causes dyspnea. The Jaagsiekte Sheep Retrovirus (JSRV) causes ovine pulmonary adenocarcinoma (OPA), whose typical clinical appearance is fluid running from nostrils. This fluid might contain surfactant as alveolar type II pneumocytes (AEII) are target cells for JSRV. Therefore, the progressive dyspnea during OPA might be caused partially by surfactant alterations...
June 15, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28647590/differences-in-the-coronal-proteome-acquired-by-particles-depositing-in-the-lungs-of-asthmatic-versus-healthy-humans
#7
Abhinav Kumar, Elif Melis Bicer, Paul Pfeffer, Marco P Monopoli, Kenneth A Dawson, Jonny Eriksson, Katarina Edwards, Steven Lynham, Matthew Arno, Annelie F Behndig, Anders Blomberg, Graham Somers, Dave Hassall, Lea Ann Dailey, Ben Forbes, Ian Mudway
Most inhaled nanomedicines in development are for the treatment of lung disease, yet little is known about their interaction with the respiratory tract lining fluids (RTLF). Here we combined the use of nano-silica, as a protein concentrator, with label-free snapshot proteomics (LC-MS/MS; key findings confirmed by ELISA) to generate a quantitative profile of the RTLF proteome and provided insight into the evolved corona; information that may be used in future to improve drug targeting to the lungs by inhaled medicines...
June 21, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28624607/obese-asthmatics-have-decreased-surfactant-protein-a-levels-mechanisms-and-implications
#8
Njira Lugogo, Dave Francisco, Kenneth J Addison, Akarsh Manne, William Pederson, Jennifer L Ingram, Cynthia L Green, Benjamin T Suratt, James J Lee, Mary E Sunday, Monica Kraft, Julie G Ledford
BACKGROUND: Eosinophils are prominent in some individuals with asthma and are elevated in the submucosa in a subgroup of obese asthmatics. Surfactant protein-A (SP-A) modulates host responses to infectious and environmental insults. OBJECTIVE: To determine if SP-A levels are altered in obese asthma patients compared to a control group and to determine the implications of these alterations in SP-A levels in asthma. METHODS: Bronchoalveolar lavage fluid from 23 lean, 12 overweight and 20 obese subjects were examined for SP-A...
June 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28621369/transport-of-nanoparticles-across-pulmonary-surfactant-monolayer-a-molecular-dynamics-study
#9
Yan Xu, Li Deng, Hao Ren, Xianren Zhang, Fang Huang, Tongtao Yue
Pulmonary nanodrug delivery is an emerging concept, especially for targeted lung cancer therapy. Once inhaled, the nanoparticles (NPs) acting as drug carriers need to efficiently cross the pulmonary surfactant monolayer (PSM) of lung alveoli, which act as the first barrier for external particles entering the lung. Herein, by performing molecular dynamics simulations, we study how inhaled NPs interact with the PSM, particularly focusing on the transport of NPs with different properties across the PSM. While hydrophilic NPs translocate directly across the PSM, transport of hydrophobic NPs is achieved as the PSM wraps them...
June 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28620154/influence-of-donor-lung-surfactant-a-and-b-protein-expression-on-the-development-of-primary-graft-dysfunction-after-lung-transplantation-a-pilot-study
#10
Asmae Belhaj, Carine Boven, Laurence Dewachter, Maria Ruiz Patino, Youri Sokolow, Benoît Rondelet
BACKGROUND Primary graft dysfunction (PGD) is responsible of high early mortality in lung transplanted patients. We measured the rate of surfactant proteins in the organ donor, and we observed the occurrence of lung PGD in the recipient. The co-relation between these two parameters was evaluated. MATERIAL AND METHODS In this pilot study, we prospectively collected blood samples and lung biopsies in thirteen donors at the time of recovery of organs before preservation. Gene expression of SP-A, SP-B, SP-D, and CC16 was evaluated by real-time quantitative PCR...
June 16, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28619132/co-infection-of-h9n2-subtype-avian-influenza-virus-and-infectious-bronchitis-virus-decreases-sp-a-expression-level-in-chickens
#11
Qi Huang, Kai Wang, Ling Pan, Kezong Qi, Hongmei Liu, Hongjun Chen
Chicken surfactant protein A (cSP-A) is a collectin believed to play an important role in antiviral immunity. However, cSP-A expression in the respiratory tract of chickens after viral co-infection remains unclear. The aim of this study was the detection and characterization of cSP-A in co-infected chickens. For this purpose, four-week-old specific pathogen-free (SPF) chickens were divided into five groups and inoculated intranasally with H9N2 subtype avian influenza virus (AIV), infectious bronchitis virus (IBV), or Newcastle disease virus (NDV)...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28613935/obstructive-sleep-apnea-and-subclinical-interstitial-lung-disease-in-mesa
#12
John S Kim, Anna J Podolanczuk, Priya Borker, Steven M Kawut, Ganesh Raghu, Joel D Kaufman, Karen D Hinckley Stukovsky, Eric A Hoffman, R Graham Barr, Daniel J Gottlieb, Susan S Redline, David J Lederer
RATIONALE: Obstructive sleep apnea (OSA) has been postulated to contribute to idiopathic pulmonary fibrosis by promoting alveolar epithelial injury via tractional forces and intermittent hypoxia. OBJECTIVE: To determine whether OSA is associated with subclinical interstitial lung disease (ILD) and with biomarkers of alveolar epithelial injury and remodeling. METHODS: We performed cross-sectional analyses of 1,690 community-dwelling adults who underwent 15-channel in-home polysomnography and thoracic computed tomography (CT) imaging in the Multi-Ethnic Study of Atherosclerosis...
June 14, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28599957/pulmonary-surfactant-dysfunction-in-pediatric-cystic-fibrosis-mechanisms-and-reversal-with-a-lipid-sequestering-drug
#13
Lasantha Gunasekara, Mustafa Al-Saiedy, Francis Green, Ryan Pratt, Candice Bjornson, Ailian Yang, W Michael Schoel, Ian Mitchell, Mary Brindle, Mark Montgomery, Elizabeth Keys, John Dennis, Grishma Shrestha, Matthias Amrein
BACKGROUND: Airway surfactant is impaired in cystic fibrosis (CF) and associated with declines in pulmonary function. We hypothesized that surfactant dysfunction in CF is due to an excess of cholesterol with an interaction with oxidation. METHODS: Surfactant was extracted from bronchial lavage fluid from children with CF and surface tension, and lipid content, inflammatory cells and microbial flora were determined. Dysfunctional surfactant samples were re-tested with a lipid-sequestering agent, methyl-β-cyclodextrin (MβCD)...
June 6, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28592015/-clinical-manifestations-of-three-cases-of-surfactant-protein-c-p-v39l-mutation
#14
J H Chen, D Y Zhao, S H An, Y J Zheng, H P Wang, H L Ma
Objective: To investigate the clinical manifestations of surfactant protein C gene (SFTPC) exon-2 c. 115G>G/T (p.V39L). Method: Patients were screened for the entire coding sequence of SFTPC. Three cases from three children's hospital with mutation in p. V39L were reported. Result: All the three cases were females. The age of onset ranged from 2 months to 7 years. Two cases had recurrent lower respiratory tract infection and failed to thrive. One had chronic anoxia and clubbing fingers. Chest computed tomography (CT) showed diffused ground glass pattern, localized emphysema and intralobular septal thickening...
June 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28591049/impact-of-serum-sp-a-and-sp-d-levels-on-comparison-and-prognosis-of-idiopathic-pulmonary-fibrosis-a-systematic-review-and-meta-analysis
#15
Kai Wang, Qing Ju, Jing Cao, Wenze Tang, Jian Zhang
BACKGROUND AND OBJECTIVE: Idiopathic pulmonary fibrosis (IPF) has a poor prognosis in general; however, it is heterogeneous to detect relative biomarkers for predicting the disease progression. Serum biomarkers can be conveniently collected to detect and help to differentially diagnose IPF and predict IPF prognosis. This meta-analysis aimed to evaluate the use of serum surfactant proteins A and D (SP-A and SP-D) for differential diagnosis and prognosis of IPF. METHODS: Relevant articles were searched in PubMed, Embase, and Chinese National Knowledge Infrastructure databases and reviewed by 2 independent readers...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28591009/surfactant-proteins-a-and-d-attenuate-lps-induced-apoptosis-in-primary-intestinal-epithelial-cells-iecs
#16
Linlin Zhang, Qinghe Meng, Natesh Yepuri, Guirong Wang, Xiuming Xi, Robert N Cooney
INTRODUCTION: SP-A/D KO mice with sepsis demonstrate more severe lung, kidney and gut injury/apoptosis than WT controls. We hypothesize SP-A and SP-D directly regulate LPS-induced P38 MAPK activation and gut apoptosis during sepsis. METHODS: Primary IECs were established from SP-A/D KO or C57BL/6 WT mice, stimulated with LPS and harvested at 24 h. IECs from WT mice were treated with SP-A, SP-D or vehicle for 20 h, then LPS for 24 h. Apoptosis, cleaved caspase-3 levels and the ratio of BAX/Bcl-2 were assayed...
June 6, 2017: Shock
https://www.readbyqxmd.com/read/28590930/eight-potential-biomarkers-for-distinguishing-between-lung-adenocarcinoma-and-squamous-cell-carcinoma
#17
Jian Xiao, Xiaoxiao Lu, Xi Chen, Yong Zou, Aibin Liu, Wei Li, Bixiu He, Shuya He, Qiong Chen
Lung adenocarcinoma (LADC) and squamous cell carcinoma (LSCC) are the most common non-small cell lung cancer histological phenotypes. Accurate diagnosis distinguishing between these two lung cancer types has clinical significance. For this study, we analyzed four Gene Expression Omnibus (GEO) datasets (GSE28571, GSE37745, GSE43580, and GSE50081). We then imported the datasets into the Gene-Cloud of Biotechnology Information online platform to identify genes differentially expressed in LADC and LSCC. We identified DSG3 (desmoglein 3), KRT5 (keratin 5), KRT6A (keratin 6A), KRT6B (keratin 6B), NKX2-1 (NK2 homeobox 1), SFTA2 (surfactant associated 2), SFTA3 (surfactant associated 3), and TMC5 (transmembrane channel-like 5) as potential biomarkers for distinguishing between LADC and LSCC...
May 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28588116/high-oxygen-concentrations-adversely-affect-the-performance-of-pulmonary-surfactant
#18
Craig D Smallwood, Parnian Boloori-Zadeh, Maricris R Silva, Andrew Gouldstone
BACKGROUND: Although effective in the neonatal population, exogenous pulmonary surfactant has not demonstrated a benefit in pediatric and adult subjects with hypoxic lung injury despite a sound physiologic rationale. Importantly, neonatal surfactant replacement therapy is administered in conjunction with low fractional FIO2 while pediatric/adult therapy is administered with high FIO2 . We suspected a connection between FIO2 and surfactant performance. Therefore, we sought to assess a possible mechanism by which the activity of pulmonary surfactant is adversely affected by direct oxygen exposure in in vitro experiments...
June 6, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28587394/mir-206-inhibits-fn1-expression-and-proliferation-and-promotes-apoptosis-of-rat-type-ii-alveolar-epithelial-cells
#19
Jun Duan, Xiaoying Zhang, Sheng Zhang, Shaodong Hua, Zhichun Feng
Bronchopulmonary dysplasia (BPD) is a syndrome of respiratory distress caused by chronic lung injury, primarily in preterm infants. miR-206 and fibronectin 1 (FN1) are associated with the development of BPD. The present study used rat type II alveolar epithelial cells (AECII) to investigate the underlying mechanisms of BPD. AECII were isolated using a primary cell culture prior to alkaline phosphatase staining and immunofluorescence of surfactant protein C (SP-C). These were used to verify the presence of AECII...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28587319/seawater-drowning-induced-acute-lung-injury-from-molecular-mechanisms-to-potential-treatments
#20
Faguang Jin, Congcong Li
Drowning is a crucial public safety problem and is the third leading cause of accidental fatality, claiming ~372,000 lives annually, worldwide. In near-drowning patients, acute lung injury (ALI) or acute respiratory distress syndrome (ARDS) is one of the most common complications. Approximately 1/3 of near-drowning patients fulfill the criteria for ALI or ARDS. In the present article, the current literature of near-drowning, pathophysiologic changes and the molecular mechanisms of seawater-drowning-induced ALI and ARDS was reviewed...
June 2017: Experimental and Therapeutic Medicine
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