Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Kinetic gene expression profiles of chicken macrophage HD11 cells in response to endotoxin from Salmonella typhimurium-798

ABSTRACT: HD11 cells were stimulated with 1 ug/ml endotoxin from ST-798 for 1, 2, 4 and 8 hours Cells were harvested at 1, 2, 4 and 8 hrs post stimulation and RNA was isolated from these cells and microarray was conducted for these RNA samples using affymetrix genechips The microarray experiment was conducted using three replications. The first two replications each used one experimental unit and one Affymetrix GeneChip for each of the eight combinations of endotoxin dose (treated vs. control) and time (1, 2, 4, or 8 hours after treatment). The third replication was analyzed with four GeneChips for four endotoxin-treated experimental units measured at 1, 2, 4, and 8 hours after treatment, respectively.

ORGANISM(S): Gallus gallus

SUBMITTER: Christopher Tuggle

PROVIDER: E-GEOD-23881 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Unique genome-wide transcriptome profiles of chicken macrophages exposed to Salmonella-derived endotoxin.

Ciraci Ceren C Tuggle Christopher K CK Wannemuehler Michael J MJ Nettleton Dan D Lamont Susan J SJ

BMC genomics 20101008

<h4>Background</h4>Macrophages play essential roles in both innate and adaptive immune responses. Bacteria require endotoxin, a complex lipopolysaccharide, for outer membrane permeability and the host interprets endotoxin as a signal to initiate an innate immune response. The focus of this study is kinetic and global transcriptional analysis of the chicken macrophage response to in vitro stimulation with endotoxin from Salmonella typhimurium-798.<h4>Results</h4>The 38535-probeset Affymetrix Gene ...[more]

PMID: 20929591

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Project description:Enhanced understanding of differential gene expression and biological pathways associated with distinct phases of intramembranous bone regeneration following femoral marrow ablation surgery will improve future advancements regarding osseointegration of joint replacement implants, biomaterials design, and bone tissue engineering. A rat femoral marrow ablation model was performed and genome-wide microarray data were obtained from samples at 1, 3, 5, 7, 10, 14, 28, and 56 days post-ablation, with intact bones serving as controls at Day 0. Bayesian model-based clustering produced eight distinct groups amongst 9,062 significant gene probe sets based on similar temporal expression profiles, which were further categorized into three major temporal classes of increased, variable, and decreased expression. Differential biological processes and pathways associated with each major temporal group were identified, and significantly expressed genes involved were visually represented by heat maps. It was determined that the increased expression group exclusively contains genes involved in pathways for matrix metalloproteinases (MMPs), Wnt signaling, TGF-Î² signaling, and inflammatory pathway. Only the variable expression group contains genes associated with glycolysis and gluconeogenesis, Notch Signaling Pathway, natural killer cell mediated cytotoxicity, and B cell receptor signaling pathway, among others. The decreased group exclusively consists of genes involved in heme biosynthesis, p53 signaling pathway, and hematopoietic cell lineage. Significant biological pathways and transcription factors expressed at each time point post-ablation were also identified. These data present the first temporal gene expression profiling analysis of the rat genome during intramembranous bone regeneration induced by femoral marrow ablation. In an Institutional Animal Care and Use Committee (IACUC) approved study, 27 adult male rats (Sprague Dawley, 400-425 g) were divided into nine groups: intact control (0 day), and 1, 3, 5, 7, 10, 14, 28, and 56 days post marrow ablation. Twenty-four animals received unilateral femoral ablation. At each time point, animals were killed in a carbon dioxide chamber, and whole femurs were harvested and denuded of soft tissue. For three samples per time point, both the distal and proximal ends of the femurs were cut off in order to exclude the epiphyses and growth plate regions. Diaphyseal marrow tissue and cells from the mid-shaft were flushed out using TrizolÂ®. Extracted RNA was homoginized and was prepared for hybridization. For each of the three samples per time point, gene expression was analyzed with GeneChipÂ® Rat Genome 230 2.0 Arrays (Affymetrix, Santa Clara, CA).

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Dataset Information

Kinetic gene expression profiles of chicken macrophage HD11 cells in response to endotoxin from Salmonella typhimurium-798

Publications

Unique genome-wide transcriptome profiles of chicken macrophages exposed to Salmonella-derived endotoxin.

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