A549 parenchymal cell activation
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE1541 | GEO | 2004/10/03
SECONDARY ACCESSION(S): PRJNA90865
REPOSITORIES: GEO
Similar Datasets
Project description:Alveolar epithalial cells (A549) were used as a model of pulmonary parenchymal cell activation to quiery gene expression profile of activation with either cyclic stretch (20% elongation), TNF (20 ng/ml), LPS (1 mcg/ml) or TNF+STRETCH at both 1 and 4 hrs.
2007-08-04 | E-GEOD-1541 | biostudies-arrayexpress
Project description:Acute respiratory distress syndrome (ARDS) is a catastrophic form of acute lung injury (ALI). The necessity for mechanical ventilation (MV) renders patients at risk for ventilator induced lung injury (VILI). Exposure to repetitive cyclic stretch (CS) and/or over-inflation exacerbates injury. Reducing tidal volume (VT) is the only therapeutic strategy shown to mitigate morbidity and mortality. Cyclic stretch has been shown to differentially regulate gene expression in part through the activation of mammalian mitogen-activated protein kinase (MAPK). Although these studies have shown both molecular and cellular alterations, no unifying hypothesis to explain MV-induced lung injury has emerged. In the current study, we hypothesized that coordinated expression of cyclic stretch (CS)-responsive genes relies on the presence of common CS-sensitive regulatory elements. To identify CS-responsive genes, we undertook a comparative examination of the gene expression profile of human bronchial epithelial airway (Beas-2B) cells in response to various injurious stimuli involved in the pathogenesis of acute lung injury (ALI)/Ventilator induced lung injury (VILI): cyclic stretch, tumor necrosis factor alpha (TNF-a), and lipopolysaccharide (LPS). Experiment Overall Design: Human Bronchial Epithelial Cells (Beas-B2) cells grown on silicon elastic plates coated with Type I collagen (Flexercell International, McKeesport, PA) were exposed to six regiments for 4 h: 1) control (static, [control]); 2) mechanical stretch (25 PKa, 30 cycles per min, [stretch]); 3) LPS (1 mcg/ml [LPS]); 4) TNF-α (20 ng/ml; [TNF]); 5) mechanical stretch plus LPS [LPS+S], and 6) mechanical stretch plus TNF-α [TNF+S]. Total RNA (duplicate experiments) was extracted using TRIZOL reagent (as per manufactures specifications) and purified using Qiagen mRNA purification Kit (as per manufacturers specifications). mRNA was hybridized to Affymetrix Human U133plus2.0 chips. Probe based analysis, background reduction, and quantile data normalization was performed in MeV 4.0 of TM4 using Robust Multi-array Average (RMA).
2009-09-15 | E-GEOD-16650 | biostudies-arrayexpress
Project description:HDFs were cultured for 24 hrs for adhesion and to reach 50-70% confluence before mechanical tension was applied. Cyclic mechanical stretch (CMS) with a 0.5-Hz sinusoidal curve at 10-20% elongation was applied using a Flexcell○RFX-5000TM Tension System during the stretching. Cells were harvested immediately after the application of CMS stimulation was completed. Control cells were cultured on the same plates in the same incubator with no stretching.
2019-08-27 | GSE119433 | GEO
Project description:Acute respiratory distress syndrome (ARDS) is a catastrophic form of acute lung injury (ALI). The necessity for mechanical ventilation (MV) renders patients at risk for ventilator induced lung injury (VILI). Exposure to repetitive cyclic stretch (CS) and/or over-inflation exacerbates injury. Reducing tidal volume (VT) is the only therapeutic strategy shown to mitigate morbidity and mortality. Cyclic stretch has been shown to differentially regulate gene expression in part through the activation of mammalian mitogen-activated protein kinase (MAPK). Although these studies have shown both molecular and cellular alterations, no unifying hypothesis to explain MV-induced lung injury has emerged. In the current study, we hypothesized that coordinated expression of cyclic stretch (CS)-responsive genes relies on the presence of common CS-sensitive regulatory elements. To identify CS-responsive genes, we undertook a comparative examination of the gene expression profile of human bronchial epithelial airway (Beas-2B) cells in response to various injurious stimuli involved in the pathogenesis of acute lung injury (ALI)/Ventilator induced lung injury (VILI): cyclic stretch, tumor necrosis factor alpha (TNF-a), and lipopolysaccharide (LPS).
2009-08-31 | GSE16650 | GEO
Project description:The aim of the experiment was to determine the effect of cyclic stretch-relaxation ("stretch") on gene expression patterns in normal diploid human bladder smooth muscle cells. Cells plated on silicone elastomer bottomed 6-well culture dishes were grown to ~80% confluence, serum-depleted for 48h and subjected to cyclic stretch-relaxation at 20% elongation for 4h. Cells seeded in stretch plates but not subjected to stretch served as controls. Total RNA was extracted from both groups of cells, reverse-transcribed, biotin-labeled, fragmented and hybridized to HG-U133A. Four biological replicates were generated for each treatment group (non-stretched or stretched). Keywords = bladder Keywords = smooth muscle cells Keywords = cyclic stretch-relaxation Keywords: other
2004-11-04 | GSE1595 | GEO
Project description:The aim of the experiment was to determine the effect of cyclic stretch-relaxation ("stretch") on gene expression patterns in normal diploid human bladder smooth muscle cells. Cells plated on silicone elastomer bottomed 6-well culture dishes were grown to ~80% confluence, serum-depleted for 48h and subjected to cyclic stretch-relaxation at 20% elongation for 4h. Cells seeded in stretch plates but not subjected to stretch served as controls. Total RNA was extracted from both groups of cells, reverse-transcribed, biotin-labeled, fragmented and hybridized to HG-U133A. Four biological replicates were generated for each treatment group (non-stretched or stretched).
2007-08-04 | E-GEOD-1595 | biostudies-arrayexpress
Project description:Time-course of gene profiles indicate that gene expression changing in cyclic stretch are related to cell adhesion and MAPK signaling. Gene expression changing by uniaxiali stretch was studied in a time course assay within 1.5 hour. Six time points (0, 10, 20, 30, 60, 90 min) were triplicated
2012-02-10 | E-GEOD-16004 | biostudies-arrayexpress
Project description:Exposure to air particulate matter is associated with increased cardiovascular morbidity and mortality. One of the possible mechanisms is by promotion of atherosclerosis mediated by synergy of particulate matter chemicals and oxidized phospholipids on vascular endothelial cells. We treated human microvascular endothelial cells (HMEC) in triplicate wells with diesel exhaust particles (DEP) extract at a concentration of 5 and 25 mcg/ml, oxidized 1-palmitoyl-2-arachidonyl-sn-glycero-3-phosphorylcholine (ox-PAPC) at concentrations of 10, 20 and 40 mcg/ml or combination of DEP at 5 mcg/ml plus ox-PAPC at 10, 20 and 40 mcg/ml. The 3600 most variably expressed genes were employed to construct a weighted gene co-expression network to assess the degree of connectivity. Module enrichment analysis showed that three modules (Brown, Green and Yellow) were highly significant (p< 0.0001) in enriched genes regulated by the treatments. These three modules exhibited patterns of synergistic/additive interaction and were enriched in pathway genes relevant to vascular inflammation. The in-vivo relevance of this gene clustering analysis was established by demonstrating that liver gene expression of hypercholesterolemic mice exposed to ultrafine particles exhibited significant upregulation of similar gene pathways, as predicted by the in-vitro synergy. Keywords: Expression profiling comparison, effect of DEP vs. ox-PAPC vs. DEP plus ox-PAPC
2007-07-30 | GSE6584 | GEO
Project description:Cyclic stretch of alveoli is characteristic of mechanical ventilation, and is postulated to be partly responsible for the lung injury and inflammation in ventilator induced lung injury. We propose that miRNAs may regulate some of the stretch response and, therefore, hypothesized that miRNAs would be differentially expressed between stretched and unstretched rat alveolar epithelial cells (RAECs). RAECs were isolated and cultured to express type I epithelial characteristics, after which they were equibiaxially stretched to 25% change in surface area at 15 cycles/minute for 1 or 6 hrs, or served as unstretched controls, and miRNA were extracted (n = 4 for all groups).
2012-03-06 | E-GEOD-36256 | biostudies-arrayexpress
Project description:Mechanical overload in the heart induces pathological remodeling that typcially leads to heart failure. We sought to build an in vitro model of heart failure by applying cyclic stretch to engineered isotropic (iso) and anisotropic (aniso) NRVM tissues. We used micoarrays to determine the effects of longitudinal and transvserse cyclic stretch on gene expression in engineered NRVM cardiac tissues. We found that cyclic stretch induced up-regulation of several known indicators of heart faliure, independent of the direction of stretch.
2013-01-30 | GSE43846 | GEO