Changes in B10F10 melanoma cells in response to stretch
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE168499 | GEO | 2022/02/14
REPOSITORIES: GEO
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Project description:AVICs were exposed to cyclic stretch to examine the role of mechanical stimuli on gene expression AVICs cultured on collagen 1 coated Bioflex were exposed to 14% stretch at 1 hz or static conditions using a Flexcell-5000 14% stretch was the experimental condition while the static condition was the control
2015-01-09 | E-GEOD-47687 | biostudies-arrayexpress
Project description:AVICs were exposed to cyclic stretch to examine the role of mechanical stimuli on gene expression AVICs cultured on collagen 1 coated Bioflex were exposed to 14% stretch at 1 hz or static conditions using a Flexcell-5000
2015-01-09 | GSE47687 | 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). 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: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
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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:miRNA-Sequencing was performed on human aortic valve interestitial cells (AVICs) exposed to 14% stretch at 1 hz or static conditions for 24h. Six static control and six samples exposed to cyclic stretch 14% for 24h
2015-01-09 | E-GEOD-49558 | biostudies-arrayexpress
Project description:The retina is often subjected to tractional forces in a variety of conditions, for instance, pathological myopia, proliferative vitreoretinopathy. As the predominant glial element in the sensory retina, Muller cells are responsible for the homeostatic and metabolic support of retinal neurons and active players in virtually all forms of retinal injury and disease. Besides, Muller cells span the entire retinal thickness, extending from the inner to the outer limiting membranes, with cell bodies located in the inner nuclear layer and lateral processes expanding into the plexiform layers of the tissue. Because of this unique morphology, Muller cells can sense even minute changes in the retinal structure because of the mechanical stretching of their long processes or side branches. Thus, itM-bM-^@M-^Ys reasonable to infer that Muller cells also participate in ocular diseases when the retina is overstretched. In this study, we aim to investigate the whole genome regulation of Muller cells under mechanical stretching, which may help in excluding possible molecular mechanisms that would account for many retinal diseases in which the retina is often subjected to mechanical forces. We used microarrays to identify patterns of gene expression changes induced by cyclic mechanical stretching in Muller cells. Rat Muller cells were seeded onto flexible bottom culture plates and subjected to a cyclic stretching regimen of 15% equibiaxial stretching for 1 and 24 h.Muller cells cultured under the same conditions but with no applied mechanical strain were considered as the unstretched control. At each time points (1 and 24 h), three totally independent experiments (3 stretched samples and 3 control samples) were conducted. Muller cells were selected for RNA extraction and hybridization on Affymetrix microarrays. Stretch (S); Control (C)
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Project description:Mechanical stimulation is an important factor for the development of complications after LASIK, but the molecular mechanism still remains unclear. In this study, we have employed whole genome microarray expression profiling as a discovery platform to identify genes responded to mechanical stretch in human corneal keratocytes. Furthermore, the specific signal transduction pathways were discussed. Mechanical stretch regulated gene expression was measured in human corneal keratocytes subjected to cyclic stretch (0-15% elongation, 0.5 Hz, sine waveform) for 0, 1 and 6 hours, respectively. Totally, 840 differentially expressed genes were identified in keratocytes under mechanical stretching, among which 493 genes were up-regulated and 388 genes were down-regulated. Theses differential genes were mainly involved in cytokine-cytokine receptor interaction, ECM-receptor interaction, Focal adhesion, TNF signaling pathway, and MAPK signaling pathway.
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Project description:The renewing human epidermis constantly senses and adapts to a wide range of mechanical cues that are ubiquitous throughout life. The mechanisms of how mechanical forces are responded by interfollicular epidermal stem cells (IFESCs) and are transmitted directly into nucleus to modify gene expression remain incompletely defined. In vitro, human IFESCs were cultured on the collagen I coated silicon rubber membrane and then subjected to the mechanical stretched. Cyclic mechanical tension at 0.5 Hz sinusoidal curve at 10% elongation was applied using an FX-5000T™ Flexercell® Tension Plus™ unit (Flexcell International Corporation). In mechanical unloading groups, cells were cultured on the same plates in the same incubator with the mechanical stretched groups but not subjected to stretch. Combining genome-wide microarray and functional analyses, we made transcriptome analysis of samples from the mechanical unstretched or stretched isolated human IFESCs.
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