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Alveolar epithelial injury

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https://www.readbyqxmd.com/read/28218740/maresin1-stimulates-alveolar-fluid-clearance-through-the-alveolar-epithelial-sodium-channel-na-k-atpase-via-the-alx-pi3k-nedd4-2-pathway
#1
Jun-Li Zhang, Xiao-Jun Zhuo, Jing Lin, Ling-Chun Luo, Wei-Yang Ying, Xiang Xie, Hua-Wei Zhang, Jing-Xiang Yang, Dan Li, Fang Gao Smith, Sheng-Wei Jin
Maresin1 (MaR1) is a new docosahexaenoic acid-derived pro-resolving agent that promotes the resolution of inflammation. In this study, we sought to investigate the effect and underlining mechanisms of MaR1 in modulating alveolar fluid clearance (AFC) on LPS-induced acute lung injury. MaR1 was injected intravenously or administered by instillation (200 ng/kg) 8 h after LPS (14 mg/kg) administration and AFC was measured in live rats. In primary rat alveolar type II epithelial cells, MaR1 (100 nM) was added to the culture medium with lipopolysaccharide for 6 h...
February 20, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28213470/higher-mini-bal-total-protein-concentration-in-early-ards-predicts-faster-resolution-of-lung-injury-measured-by-more-ventilator-free-days
#2
Carolyn M Hendrickson, Jason Abbott, Hanjing Zhuo, Kathleen D Liu, Carolyn S Calfee, Michael A Matthay
The protein concentration of alveolar edema fluid in acute respiratory distress syndrome (ARDS) is dynamic. It reflects alveolar flooding during acute injury as well as fluid and protein clearance over time. We hypothesized that among ARDS patients treated with low tidal volume ventilation, higher concentrations of protein in mini-bronchoalveolar lavage (mBAL) samples would predict slower resolution of lung injury and worse clinical outcomes. Total protein and IgM concentrations in Day 0 mBAL samples from 79 subjects enrolled in the aerosolized albuterol (ALTA) ARDS Network Albuterol trial were measured by colorimetric assay and ELISA respectively...
February 17, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28212617/surfactant-protein-d-sp-d-gene-polymorphisms-and-serum-level-as-predictors-of-susceptibility-and-prognosis-of-acute-kidney-injury-in-the-chinese-population
#3
Jiao Liu, Guang Li, Lianghai Li, Zhiyong Liu, Qingshan Zhou, Guirong Wang, Dechang Chen
BACKGROUND: Injury to the kidney epithelial barrier is a characteristic feature of acute kidney injury (AKI). Serum surfactant protein-D (SP-D), a known biomarker of damaged alveolar epithelium, is also secreted by renal tubular epithelial cells. Therefore, the aim of this study was to examine the possible association of SP-D with AKI susceptibility and prognosis. METHODS: In this study, 159 AKI patients and 120 healthy individuals were included. SP-D polymorphisms Thr11Met and Thr160Ala, AKI patient serum SP-D levels at days 1, 3 and 7 and urine KIM-1 levels in both AKI patients and controls were examined...
February 17, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28196122/detrimental-elavl-1-hur-dependent-gsk3%C3%AE-mrna-stabilization-impairs-resolution-in-acute-respiratory-distress-syndrome
#4
Olivia Hoffman, Nana Burns, István Vadász, Holger K Eltzschig, Michael G Edwards, Christine U Vohwinkel
A hallmark of acute respiratory distress syndrome (ARDS) is accumulation of protein-rich edema in the distal airspaces and its removal is critical for patient survival. Previous studies have shown a detrimental role of Glycogen Synthase Kinase (GSK) 3β during ARDS via inhibition of alveolar epithelial protein transport. We hypothesized that post-transcriptional regulation of GSK3β could play a functional role in ARDS resolution. To address this hypothesis, we performed an in silico analysis to identify regulatory genes whose expression correlation to GSK3β messenger RNA utilizing two lung cancer cell line array datasets...
2017: PloS One
https://www.readbyqxmd.com/read/28195073/effects-of-budesonide-on-the-lung-functions-inflammation-and-apoptosis-in-a-saline-lavage-model-of-acute-lung-injury
#5
D Mokra, P Kosutova, S Balentova, M Adamkov, P Mikolka, J Mokry, M Antosova, A Calkovska
Diffuse alveolar injury, edema, and inflammation are fundamental signs of acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). Whereas the systemic administration of corticosteroids previously led to controversial results, this study evaluated if corticosteroids given intratracheally may improve lung functions and reduce edema formation, migration of cells into the lung and their activation in experimentally-induced ALI. In oxygen-ventilated rabbits, ALI was induced by repetitive saline lung lavage, until PaO2 decreased to < 26...
December 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28186665/dexmedetomidine-enhances-human-lung-fluid-clearance-through-improving-alveolar-sodium-transport
#6
Yong Cui, Yan Ding, Lei Chen, Yue Li, Yan Chun Li, Hongguang Nie
Accumulating evidence shows that dexmedetomidine can attenuate lung edema with acute lung injury in experimental mouse and rat models, but the mechanisms of dexmedetomidine on human alveolar fluid transport are still unknown. We measured the effects of dexmedetomidine on alveolar fluid clearance in human lung lobes ex vivo. Moreover, we measured the regulation of transepithelial Na(+) transport by dexmedetomidine in H441 cells by electrophysiological technique and western blot method. Our results showed that intratracheal instillation of dexmedetomidine markedly increased the re-absorption of 5% bovine serum albumin instillate (19...
February 10, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28161733/1%C3%AE-25-dihydroxyvitamin-d3-ameliorates-seawater-aspiration-induced-lung-injury-by-inhibiting-the-translocation-of-nf-%C3%AE%C2%BAb-and-rhoa
#7
Minlong Zhang, Faguang Jin
Our previous study have reported that 1α,25-Dihydroxyvitamin D3 (calcitriol) suppresses seawater aspiration-induced ALI in vitro and in vivo. We also have confirmed that treatment with calcitriol ameliorates seawater aspiration-induced inflammation and pulmonary edema via the inhibition of NF-κB and RhoA/Rho kinase pathway activation. In our further work, we investigated the effect of calcitriol on nuclear translocation of NF-κB and membrane translocation of RhoA in vitro. A549 cells and rat pulmonary microvascular endothelial cells (RPMVECs) were cultured with calcitriol or not for 48 h and then stimulated with 25% seawater for 40 min...
February 4, 2017: Inflammation
https://www.readbyqxmd.com/read/28151947/lung-protection-by-inhalation-of-exogenous-solubilized-extracellular-matrix
#8
Jinglei Wu, Priya Ravikumar, Kytai T Nguyen, Connie C W Hsia, Yi Hong
Decellularized extracellular matrix (ECM) contains complex tissue-specific components that work in concert to promote tissue repair and constructive remodeling and has been used experimentally and clinically to accelerate epithelial wound repair, leading us to hypothesize that lung-derived ECM could mitigate acute lung injury. To explore the therapeutic potential of ECM for noninvasive delivery to the lung, we decellularized and solubilized porcine lung ECM, then characterized the composition, concentration, particle size and stability of the preparation...
2017: PloS One
https://www.readbyqxmd.com/read/28137591/amphiregulin-suppresses-epithelial-cell-apoptosis-in-lipopolysaccharide-induced-lung-injury-in-mice
#9
Saiko Ogata-Suetsugu, Toyoshi Yanagihara, Naoki Hamada, Chika Ikeda-Harada, Tetsuya Yokoyama, Kunihiro Suzuki, Tomonobu Kawaguchi, Takashige Maeyama, Kazuyoshi Kuwano, Yoichi Nakanishi
BACKGROUND AND OBJECTIVE: As a member of the epidermal growth factor family, amphiregulin contributes to the regulation of cell proliferation. Amphiregulin was reported to be upregulated in damaged lung tissues in patients with chronic obstructive pulmonary disease and asthma and in lung epithelial cells in a ventilator-associated lung injury model. In this study, we investigated the effect of amphiregulin on lipopolysaccharide (LPS)-induced acute lung injury in mice. METHODS: Acute lung injury was induced by intranasal instillation of LPS in female C57BL/6 mice, and the mice were given intraperitoneal injections of recombinant amphiregulin or phosphate-buffered saline 6 and 0...
January 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28080141/low-concentration-of-oleic-acid-exacerbates-lps-induced-cell-death-and-inflammation-in-human-alveolar-epithelial-cells
#10
Altug Kucukgul, Suat Erdogan
PURPOSE: The current study aimed to investigate in vitro effects of oleic acid on lipopolysaccharide (LPS)-induced acute lung injury in the human lung epithelial cells (A549). MATERIALS AND METHODS: The cell viability was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) tests. Selected gene expression levels were analyzed by Real-Time Quantitative-Polymerase Chain Reaction (RT-qPCR). RESULTS: 24 hours of LPS (100 ng/mL) exposure decreased the cells viability by 44...
January 12, 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/28077319/role-of-insulin-like-growth-factor-axis-in-the-bleomycin-induced-lung-injury-in-rats
#11
Lakshmi Kanth Kotarkonda, Ritu Kulshrestha, Krishnan Ravi
BACKGROUND: Alveolar epithelial cell injury has been proposed as a causative factor for the onset and progression of pulmonary fibrosis. However, the role of type II alveolar epithelial cells (AECs) in the epithelial mesenchymal transition (EMT) is controversial. AIMS: The present study performed in rats instilled with bleomycin investigated a) the expressions of the insulin growth factor (IGF-1) and insulin growth factor binding protein 5 (IGFBP-5) and transforming growth factor (TGF-β1) in the type II AECs, b) the role of type II AECs in EMT and extracellular matrix (ECM) formation and, c) the effect of pioglitazone on all the above parameters...
January 7, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28077237/interplay-of-extracellular-matrix-and-leukocytes-in-lung-inflammation
#12
REVIEW
Thomas N Wight, Charles W Frevert, Jason S Debley, Stephen R Reeves, William C Parks, Steven F Ziegler
During inflammation, leukocytes influx into lung compartments and interact with extracellular matrix (ECM). Two ECM components, versican and hyaluronan, increase in a range of lung diseases. The interaction of leukocytes with these ECM components controls leukocyte retention and accumulation, proliferation, migration, differentiation, and activation as part of the inflammatory phase of lung disease. In addition, bronchial epithelial cells from asthmatic children co-cultured with human lung fibroblasts generate an ECM that is adherent for monocytes/macrophages...
February 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28076504/the-role-of-bradykinin-in-lung-ischemia-reperfusion-injury-in-a-rat-lung-transplantation-model
#13
Zheng Tang, Zhiwei Wang, Zhipeng Hu, Min Zhang, Luocheng Li, Bowen Li
PURPOSE: To investigate the role of bradykinin in a rat lung transplantation (LTx) model and preliminarily discuss the relationship between bradykinin and CD26/DPP-4. METHODS: Rats were randomly divided into four groups: Control (CON), Sham, low potassium dextranglucose (LPD), and AB192 (n=15/group). Orthotopic single LTx was performed in the LPD and AB192 groups. The donor lungs were flush-perfused and preserved with low potassium dextranglucose (LPD) or LPD+CD26/DPP-4 catalytic inhibitor (AB192)...
December 2016: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28062913/understanding-the-developmental-pathways-pulmonary-fibroblasts-may-follow-during-alveolar-regeneration
#14
REVIEW
Stephen McGowan
Although pulmonary alveolar interstitial fibroblasts are less specialized than their epithelial and endothelial neighbors, they play essential roles during development and in response to lung injury. At birth, they must adapt to the sudden mechanical changes imposed by the onset of respiration and to a higher ambient oxygen concentration. In diseases such as bronchopulmonary dysplasia and interstitial fibrosis, their adaptive responses are overwhelmed leading to compromised gas-exchange function. Thus, although fibroblasts do not directly participate in gas-exchange, they are essential for creating and maintaining an optimal environment at the alveolar epithelial-endothelial interface...
January 6, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28062213/anti-fibrotic-effects-of-bone-morphogenetic-protein-7-modified-bone-marrow-mesenchymal-stem-cells-on-silica-induced-pulmonary-fibrosis
#15
Xiaoli Li, Guoliang An, Yan Wang, Di Liang, Zhonghui Zhu, Ximeng Lian, Piye Niu, Caixia Guo, Lin Tian
Silicosis is an occupational lung disease caused by exposure to small particles of crystalline silica, which ultimately results in diffuse pulmonary fibrosis. Evidence indicates an anti-fibrotic role of bone morphogenetic protein-7 (BMP-7) and bone marrow mesenchymal stem cells (BMSCs) in lung diseases. Therefore, strategies incorporating genetic engineering and stem cell biology might have a tremendous potential to treat critical injuries and diseases. Therefore, we modified BMSCs to overexpress the BMP-7 gene (BMP-7-BMSCs) by lentivirus transduction, and then evaluated whether fibrotic processes were inhibited by these cells in vivo...
January 4, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28052715/c2-ceramide-influences-alveolar-epithelial-barrier-function-by-down-regulating-zo-1-occludin-and-claudin-4-expression
#16
Jin Yang, Ying Wan, Hui Liu, Jirui Bi, Youjin Lu
Noncardiogenic lung edema is a key factor affecting the prognosis of acute lung injury (ALI). Previous studies have been focused on regulatory roles of ceramide on lung vascular endothelial barrier functions and had already identified ceramide as mediator involved in the formation of lung edema. However, the effects of ceramide on lung epithelial barrier were still unknown. This study aimed to investigate the effects of ceramide on the barrier function of alveolar epithelial cells. Primary mouse alveolar type II epithelial cells (AECII) were grown on Transwell polyester membranes to construct monolayer, and stimulated with different concentrations of ceramide...
January 4, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28049950/anticytotoxin-effects-of-amentoflavone-to-pneumolysin
#17
Xiaoran Zhao, Bowen Liu, Shui Liu, Lin Wang, Jianfeng Wang
Pneumolysin (PLY) is a devastating bacterial protein toxin of Streptococcus pneumoniae that punctures the cytomembrane, leading to pathological reactions, such as cell disruption and inflammation. Drugs capable of closely impacting the toxin are considered advantageous in the treatment of bacterial infections. Amentoflavone (AMF) is a chemical substance extracted from traditional Chinese herbs. Previous studies have demonstrated that AMF has multiple pharmacological effects and mentioned without attenuating pneumolysin-mediated cytotoxicity...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28031106/-protective-effect-of-human-amnion-epithelial-cells-through-endotracheal-instillation-against-lipopolysaccharide-induced-acute-lung-injury-in-mice
#18
Yanmin Xia, Wenchen Wang, Hong Zhang, Jiakuan Chen, Ming Wang, Zhonghu Ge, Jian Wang, Tao Jiang
Objective To investigate the therapeutic effect of human amnion epithelial cells (hAECs) through endotracheal instillation on acute lung injury (ALI) induced by lipopolysaccharide (LPS) in mice and its underlying mechanism. Methods Male C57BL/6 mice were randomly divided into normal control group, hAECs control group, LPS-induced ALI group and hAECs treatment group (n=10 each group). In the latter two groups, mice were subjected to LPS (5 mg/kg) by oral insertion, and 1 hour later, PBS (50 μL) and hAECs (1×10(7)/mL, 50 μL) were administered by oral insertion in the two groups, respectively...
January 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28012489/pathognomonic-remodeling-of-blood-and-lymphatic-capillaries-in-idiopathic-pulmonary-fibrosis
#19
REVIEW
Masahito Ebina
Numerous studies have been published investigating the pathologic alterations in various interstitial pneumonias, particularly in idiopathic pulmonary fibrosis (IPF). However, the few existing studies on capillary remodeling, which does not seem to have priority for pathologic diagnosis, are contradictory, with some reporting increased and others reduced vascularization. We hypothesized that these discrepancies were due to the temporal heterogeneity of the lesions in IPF. We subsequently developed original techniques for evaluating vascular density within the alveolar septa and discovered, for the first time, a heterogeneous increase in alveolar capillaries in the lungs of IPF patients...
January 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/28005404/anti-histone-properties-of-c1-esterase-inhibitor-protect-against-lung-injury
#20
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
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