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Effect of high or low chronic shear stress on microvascular endothelial cells cultured on native- versus AGE-fibronectin

ABSTRACT: Pulmonary microvascular endothelial cells were cultured on the inner surface of fibers (each 700 µm inner diameter) coated with either with native- or advanced glycation endproduct (AGE) modified fibronectin in hollow-fiber cartridges (FiberCell Systems, Inc.). Duration of shear stress application was 10 days. Shear stress was gradually increased to 17 dyne/cm2 in 2 samples (GSM32266: native fibronectin high shear stress or GSM45608: AGE-fibronectin) or was kept at constant low level of 1 dyne/cm2 in 1 sample (GSM41248: native fibronectin low shear stress). Keywords: parallel sample

ORGANISM(S): Homo sapiens

PROVIDER: GSE2424 | GEO | 2006/01/01

SECONDARY ACCESSION(S): PRJNA91139

REPOSITORIES: GEO

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Effect of high or low chronic shear stress on microvascular endothelial cells cultured on native- versus AGE-fibronectin

Project description:Pulmonary microvascular endothelial cells were cultured on the inner surface of fibers (each 700 µm inner diameter) coated with either with native- or advanced glycation endproduct (AGE) modified fibronectin in hollow-fiber cartridges (FiberCell Systems, Inc.). Duration of shear stress application was 10 days. Shear stress was gradually increased to 17 dyne/cm2 in 2 samples (GSM32266: native fibronectin high shear stress or GSM45608: AGE-fibronectin) or was kept at constant low level of 1 dyne/cm2 in 1 sample (GSM41248: native fibronectin low shear stress). Keywords: parallel sample

2005-12-31 | E-GEOD-2424 | biostudies-arrayexpress

Protein expression in primary murine dermal fibroblasts grown on fibronectin vs. plastic

Project description:We were interested in identifying proteins that are regulated in response to the extracellular matrix molecule, fibronectin, in dermal fibroblasts. To determine proteins regulated by exposure to fibronectin, primary murine dermal fibroblasts were cultured on tissue culture plastic or on tissue culture plates coated with a thin layer of fibronectin (2 μg/cm2). Fibroblasts were seeded at 35,000 cells/10 cm2 and were harvested 48 hours later. Cell pellets from these fibroblasts were shipped to Kinexus Bioinformatics Corp. (Vancouver, B.C.) where they were lysed and analyzed using the Kinex TM Antibody Microarray (KAM 1.2), which contains 800 (500 pan-specific and 300 phosphorylation site-specific) antibodies. This enabled us to identify candidate proteins regulated by exposure to fibronectin.

2011-06-22 | GSE30135 | GEO

Endothelial Responses to Atheroprone Flow

Project description:In order to simulate the effects of shear stress in regions of the vasculature prone to developing atherosclerosis, we subjected human umbilical vein endothelial cells to reversing shear stress, in order to mimic hemodynamic conditions at the wall of the carotid sinus, a site of complex, reversing blood flow and commonly observed atherosclerosis. We compared the effects of reversing shear stress (time-average 1 dyne/cm2, maximum +11 dynes/cm2, minimum -11 dynes/cm2, 1 Hz), arterial steady shear stress (15 dynes/cm2), and low steady shear stress (1 dyne/cm2) in terms of gene expression, cell proliferation, and monocyte adhesiveness. Microarray analysis revealed most differentially expressed genes were similarly regulated by all three shear stress regimens when compared to static culture. Comparisons of the three shear stress regimens to each other allowed identification of 138 genes regulated by low average shear stress and 22 by fluid reversal. Functional assays indicated that low average shear stress induces increased cell proliferation as compared to high shear stress. Reversing shear stress was the only condition that induced monocyte adhesion. Monocyte adhesion was partially inhibited by incubation of the endothelial cells with ICAM-1 blocking antibody. Increased surface heparin sulfate proteoglycan expression was observed in cells exposed to reversing shear stress. When these cells were treated with heparinase III monocyte adhesion was significantly reduced. Our results suggest that low steady shear stress is the major impetus for differential gene expression and cell proliferation, while reversing flow regulates monocyte adhesion.

2009-11-16 | GSE16706 | GEO

Shear Stress and NOTCH1 Regulate Calcification Related Genes in Human Aortic Valve Endothelium (RNA-Seq)

Project description:We are interested in the role of NOTCH1 and Shear Stress in Aortic Valve Endothelium. Primary human aortic valve endothelium was subjected to 4 conditions in vitro. 1) Control siRNA, No shear stress. 2) NOTCH1 siRNA, No shear stress. 3) Control siRNA, 15 dynes/cm2 shear stress. 4) NOTCH1 siRNA, 15 dynes/cm2 shear stress. Triplicates of each condition were pooled for library perp and sequencing

2015-05-16 | E-GEOD-47157 | biostudies-arrayexpress

The Adaptive Response of Endothelial Cells to Increased Shear Stress

Project description:In this study, we characterized the adaptive response of arterial endothelial cells to acute increases in shear stress magnitude in well-defined in vitro settings. Porcine endothelial cells were preconditioned by a basal level shear stress of 15 ± 15 dynes/cm2 at 1 Hz for 24 hours, and an acute increase in shear stress magnitude (30 ± 15 dynes/cm2) was then applied. The transcriptomics studies using microarray identified genes that were sensitive to the elevated shear magnitude. A significant number of the identified genes in our study are previously unknown as sensitive to shear stress. Porcine endothelial cells were preconditioned by a basal level shear stress of 15 ± 15 dynes/cm2 at 1 Hz for 24 hours, and an acute increase in shear stress magnitude (30 ± 15 dynes/cm2) was then applied. Gene expression at multiple time points was measured using microarray.

2011-12-01 | E-GEOD-26505 | biostudies-arrayexpress

Time series RNA profiling of endotheilal cells in response to atheroprone and atheroprotective flows

Project description:To profile shear stress-regulated endothelial transcriptomes, we performed RNA-seq with HUVECs subjected to different shear flow conditions, including atheroprotective pulsatile shear (PS, 12±4 dyn/cm2) and atheroprone oscillatory shear (OS, 0.5±4 dyn/cm2), or kept as static control (ST) for four time periods (1, 4, 12 and 24 hours)

2017-05-22 | GSE92506 | GEO

The Adaptive Response of Endothelial Cells to Increased Shear Stress

2011-12-01 | GSE26505 | GEO

Endothelial Response to Increased Shear Stress Frequency

Project description:Porcine endothelial cells were preconditioned by a basal level shear stress of 15 ± 15 dynes/cm2 at 1 Hz for 24 hours, and an acute increase in shear stress frequency (2 Hz) was then applied. The transcriptomics studies using microarray identified genes that were sensitive to the elevated shear frequency. keywords: adaptation, shear stress, frequency, microarray, gene expression Porcine endothelial cells were preconditioned by a basal level shear stress of 15 ± 15 dynes/cm2 at 1 Hz for 24 hours, and an acute increase in shear stress magnitude (2 Hz) was then applied. Gene expression at multiple time points was measured using microarray.

2011-12-01 | E-GEOD-26513 | biostudies-arrayexpress

HUVECs cultured under normal or high laminar shear stress

Project description:Many studies have characterised the effect of normal laminar shear stress (LSS) on endothelial responses, however elevated shear stress, as would be experienced overlying a stenotic plaque, has not been studied in depth. Therefore we used transcriptomics and related functional analyses to compare cells exposed to laminar shear stress at 15 or 75 dynes/cm2 for 24 hours (LSS15-normal or LSS75-high shear stress). Human umbilical vein endothelial cells (HUVEC n=4 per flow condition from different batches of pooled donor HUVEC p2) were cultured for 24 hours on gelatin coated slides under laminar shear stress of either 15 dynes/cm2 or 75 dynes/cm2 (LSS15 or LSS75) to assess the effect of high shear stress on endothelial cells. Total RNA was obtained using Qiagen kit and array analysis performed by Service XS (Leiden, Netherlands).

2011-02-01 | E-GEOD-23289 | biostudies-arrayexpress

Endothelial Response to Increased Shear Stress Frequency

2011-12-01 | GSE26513 | GEO

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