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Early Response Genes in Osteoblasts Exposed to Dynamic Fluid Flow

ABSTRACT: Cyclic mechanical loads applied to the skeleton increase bone formation. Dynamic fluid flow is a potent anabolic stimulus for cultured osteoblasts. In this study, gene profiles involved in mediating the anabolic response of MC3T3 osteoblasts to dynamic fluid flow are investigated.

ORGANISM(S): Mus musculus

PROVIDER: GSE16211 | GEO | 2009/05/28

SECONDARY ACCESSION(S): PRJNA117151

REPOSITORIES: GEO

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Early Response Genes in Osteoblasts Exposed to Dynamic Fluid Flow

Project description:Cyclic mechanical loads applied to the skeleton increase bone formation. Dynamic fluid flow is a potent anabolic stimulus for cultured osteoblasts. In this study, gene profiles involved in mediating the anabolic response of MC3T3 osteoblasts to dynamic fluid flow are investigated. MC3T3 osteoblast RNA was harvested 30-minutes and 1-hour post-stimulation respectively as experimental samples for comparison to the control group without dynamic fluid flow.

2010-05-18 | E-GEOD-16211 | biostudies-arrayexpress

Expression Data from MC3T3-E1 cells subjected to laminar fluid flow (LFF)

Project description:Osteoblasts are responsive to shear stress. We investigated the effect of of laminar fluid flow (LFF) on osteoblast-like MC3T3-E1 cells at two timepoints. We used microarray analysis to detail the global gene expression of MC3T3-E1 cells in response to 1 hour of laminar fluid flow directly and 4 hours after treatment.

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Tumor-derived Jagged1- and Notch-dependent transcription changes in MC3T3-E1 osteoblasts

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Tumor-derived Jagged1- and Notch-dependent transcription changes in MC3T3-E1 osteoblasts

Project description:Transcriptional profiling of MC3T3-E1 osteoblasts that were flow cytometry-separated from cocultures with control or Jagged1-overexpressing tumor cells and treated with either DMSO control or 1μM MRK-003 (gamma-secretase inhibitor). One cell line (MC3T3-E1) cells: four different experimental conditions: cultured with (1) control tumor cells + DMSO; (2) Jagged1-overexpressing tumor cells + DMSO; (3) control tumor cells + MRK-003; (4) Jagged1-overexpressing tumor cells + MRK-003. Each experiment has two biological replicates. Total, 8 samples.

2010-08-15 | E-GEOD-20517 | biostudies-arrayexpress

Mus musculus

Project description:Early Response Genes in Osteoblasts Exposed to Dynamic Fluid Flow

| PRJNA117151 | ENA

Integrative transcriptomic and proteomic analysis of osteocytic cells exposed to fluid flow reveals novel mechano-sensitive signaling pathways

Project description:Osteocytes, positioned within boneâs interstitial space, are subject to fluid flow upon whole bone loading. Such fluid flow is widely theorized to be a mechanical signal transduced by osteocytes, initiating a poorly understood cascade of signaling events mediating bone metabolism. The objective of this study was to utilize high-throughput approaches to examine the time course of flow-induced changes in osteocyte gene transcript and protein levels. Microarray analysis demonstrated fluid flow regulation of genes consistent with known anabolic loading responses, including Ptgs2, NF-ÎºB inhibitors, MAP3 kinases, and Wnt/Î²-catenin pathway signaling molecules. However, two of the most highly up-regulated gene productsâCxcl1 and Cxcl2, confirmed by qPCRâhave not previously been reported to be responsive to fluid flow. Gene ontology analysis suggested a highly significant inflammatory and immune response, with cellular functions including trafficking, cell-to-cell signaling, and tissue development. Proteomic analysis of the same samples demonstrated greatest up-regulation of the ATP-producing enzyme NDK, calcium-binding Calcyclin, and G protein-coupled receptor kinase 6. An integrative pathway analysis merging fold changes in transcript and protein levels predicted signaling nodes not directly detected at the sampled time points, including STAT3 and c-Myc. These results extend our knowledge of the osteocytic response to fluid flow, most notably up-regulation of Cxcl1 and Cxcl2 as a possible paracrine agent for osteoblastic and osteoclastic recruitment. Osteocyte-like MLO-Y4 cells were subjected to 2 hours of 10 dyn/cm2 oscillating fluid flow in parallel-plate fluid flow chambers and harvested for analysis at 0, 2, 8, and 24 hours post-flow incubation. Parallel control samples from sham treated cells were also collected at each time point.

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Global gene expression changes in osteoblasts from fluoride-tolerant mice

Project description:In order to define the underlying mechanism of fluoride resistance in mammals and provide a theoretical basis for fluorosis treatment, high-throughput sequencing was applied to map the genetic changes of fluoride-resistant mouse osteoblasts. Fluoride-tolerant MC3T3-E1 cells were developed by gradient fluoride exposure. The differentially expressed genes of fluorine-resistant MC3T3-E1 cells were identified by high-throughput sequencing. High-throughput RNA sequencing identified 2702 differentially expressed genes (DEGs) showed more than 2-fold difference in 30ppm FR MC3T3-E1 cells, of which 17 DEGs were associated with ferroptosis.

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Expression Data from MC3T3-E1 cells subjected to laminar fluid flow (LFF)

Project description:Expression Data from MC3T3-E1 cells subjected to laminar fluid flow (LFF)

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Testing the effect of fluid flow in dermal fibroblasts

Project description:All living cells are constantly exposed to a number of physical forces. The study aims to investigate the response of fibroblasts to dynamic mechanical forces.This experiment captures the expression data obtained by performing microarray based analysis on dermal fibroblasts subjected to 75 and 150 Âµl/min fluid flow rate.

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Integrative transcriptomic and proteomic analysis of osteocytic cells exposed to fluid flow reveals novel mechano-sensitive signaling pathways

Project description:Osteocytes, positioned within bone’s interstitial space, are subject to fluid flow upon whole bone loading. Such fluid flow is widely theorized to be a mechanical signal transduced by osteocytes, initiating a poorly understood cascade of signaling events mediating bone metabolism. The objective of this study was to utilize high-throughput approaches to examine the time course of flow-induced changes in osteocyte gene transcript and protein levels. Microarray analysis demonstrated fluid flow regulation of genes consistent with known anabolic loading responses, including Ptgs2, NF-κB inhibitors, MAP3 kinases, and Wnt/β-catenin pathway signaling molecules. However, two of the most highly up-regulated gene products—Cxcl1 and Cxcl2, confirmed by qPCR—have not previously been reported to be responsive to fluid flow. Gene ontology analysis suggested a highly significant inflammatory and immune response, with cellular functions including trafficking, cell-to-cell signaling, and tissue development. Proteomic analysis of the same samples demonstrated greatest up-regulation of the ATP-producing enzyme NDK, calcium-binding Calcyclin, and G protein-coupled receptor kinase 6. An integrative pathway analysis merging fold changes in transcript and protein levels predicted signaling nodes not directly detected at the sampled time points, including STAT3 and c-Myc. These results extend our knowledge of the osteocytic response to fluid flow, most notably up-regulation of Cxcl1 and Cxcl2 as a possible paracrine agent for osteoblastic and osteoclastic recruitment.

2013-07-01 | GSE42874 | GEO

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