ChIP-chip by array of human mesenchymal stem cells to identify Argonaute1 bound mRNAs and to identify mRNAs expressed by the human embryo stem cell line H1 before and after differentiation along the neural lineage.
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ABSTRACT: Gene expression profiles were generated with Illumina arrays for untreated human mesenchymal stem cells and also Argonaute1 bound mRNAs in the same cells. In addition gene expression profiles were generated for the human embryo cell line H1 before and after differentiation along the neural lineage. NOTE: assays for human embryonic stem cells before and after differentiation were added in July 2014 and data files for the mesenchymal stem cells were updated.
Project description:On going efforts are directed at understanding the mutualism between the gut microbiota and the host in breast-fed versus formula-fed infants. Due to the lack of tissue biopsies, no investigators have performed a global transcriptional (gene expression) analysis of the developing human intestine in healthy infants. As a result, the crosstalk between the microbiome and the host transcriptome in the developing mucosal-commensal environment has not been determined. In this study, we examined the host intestinal mRNA gene expression and microbial DNA profiles in full term 3 month-old infants exclusively formula fed (FF) (n=6) or breast fed (BF) (n=6) from birth to 3 months. Host mRNA microarray measurements were performed using isolated intact sloughed epithelial cells in stool samples collected at 3 months. Microbial composition from the same stool samples was assessed by metagenomic pyrosequencing. Both the host mRNA expression and bacterial microbiome phylogenetic profiles provided strong feature sets that clearly classified the two groups of babies (FF and BF). To determine the relationship between host epithelial cell gene expression and the bacterial colony profiles, the host transcriptome and functionally profiled microbiome data were analyzed in a multivariate manner. From a functional perspective, analysis of the gut microbiota's metagenome revealed that characteristics associated with virulence differed between the FF and BF babies. Using canonical correlation analysis, evidence of multivariate structure relating eleven host immunity / mucosal defense-related genes and microbiome virulence characteristics was observed. These results, for the first time, provide insight into the integrated responses of the host and microbiome to dietary substrates in the early neonatal period. Our data suggest that systems biology and computational modeling approaches that integrate “-omic” information from the host and the microbiome can identify important mechanistic pathways of intestinal development affecting the gut microbiome in the first few months of life. KEYWORDS: infant, breast-feeding, infant formula, exfoliated cells, transcriptome, metagenome, multivariate analysis, canonical correlation analysis 12 samples, 2 groups
Project description:We have demonstrated that fish oil/pectin (FO/P) diets protect against colon cancer compared to corn oil/cellulose (CO/C) by upregulating apoptosis and suppressing proliferation. To elucidate the mechanisms whereby FO/P diets induce apoptosis and suppress proliferation during the tumorigenic process, we analyzed the temporal gene expression profiles from exfoliated rat colonocytes. KEYWORDS: Fish oil/pectin, pectin, exfoliated colonocytes, gene expression, apoptosis, colon cancer, chemoprevention Rats consumed diets containing FO/P or CO/C and were injected with azoxymethane (AOM, 2x, 15 mg/kg BW, s.c.). Feces collected at the initiation, aberrant crypt foci (ACF), and tumor stages of colon cancer (24 h (n=20), 7 wk (n=37), and 28 wk (n=28) after AOM injection, respectively) was used for poly A(+) RNA extraction. Gene expression signatures were determined using Codelink arrays.
Project description:Transcriptional profiling of mouse induced pluripotent stem (iPS) cells with the low potency (strain 20D17) compared to control iPS cells with the normal potency (strain 38C2). Two-condition experiment: iPS cells strain 20D17 vs. control iPS cells strain 38C2. Biological replicates: 2 strain 20D17, 2 strain 38C2, independently grown and harvested. One replicate per array.
Project description:Gene expression profiling of normal tissues after curative radiotherapy was carried out to investigate the pathogenesis of late radiation injury in humans. Irradiated and control normal breast tissue was collected from patients undergoing bilateral mastectomy for ipsilateral tumour relapse or prophylaxis following radiotherapy for breast cancer. Using P.A.L.M. laser capture microdissection (LCM) of frozen sections, breast tissue was separated into an epithelial compartment (terminal duct lobular units and ducts) and a stromal compartment (remaining tissue). RNA was extracted, amplified and hybridised to a 20k cDNA array against a breast tissue reference RNA. Expression profiles of irradiated vs control breast were compared for each tissue compartment
Project description:We performed miRNA microarray profiling on samples prepared from two different cell lines by three widely-used total RNA sample prep methods. miRNA microarrays were manufactured by Agilent Technologies (Santa Clara, CA), and contain 20-40 features targeting each of 470 human miRNAs (Agilent design ID 016436). Sequences of the 470 miRNAs were obtained from the Sanger miRBase, release 9.1. Labeling and hybridization of total RNA samples were performed according to the manufacturer’s protocol. 100ng total RNA was used as input into the labeling reaction, and the entire reaction was hybridized to the array for 20 hours at 55°C. For total RNA preps, frozen cell pellets were resuspended in phosphate buffered saline and divided into equal aliquots of 5x106 (HeLa) or 1x107 (ZR-75-1) cells and refrozen. Individual aliquots were subsequently thawed just before use.
Project description:This SuperSeries is composed of the following subset Series: GSE11806: miRNA Microarray Profiling of Nine Different Normal Human Tissues GSE11840: miRNA Microarray Profiling with Three Different Total RNA Prep Methods Refer to individual Series
Project description:To gain insights into the genetic program activated within the distinct vascular and inflammatory transplant microenvironments in Id1/Id3 deficient and WT mice, we performed a series of gene screening experiments using RNA from total graft tissue as well as from myeloid and endothelial (i.e., CD31+ and ISB4+) cells isolated from the grafts at 1 week post-transplantation.
Project description:Four biological repeats of P.aeruginosa PA14 and four biological repeats of P.aeruginosa PA14 metR::phoA were grown in BM2 swarming media plates containing 62mM potassium phosphate buffer [pH7], 2 mM MgSO4, 10uM FeSO4, 0.4% (wt/vol) glucose, 0.1% (wt/vol) casamino acids and 0.5% agar. Microarray experiments were done using microarray slides and protocols from TIGR on samples harvested from the dendritic swarm colony growth, 2 to 3 mm of the swarm zone edge.
Project description:Five biological repeats of P.aeruginosa PAO1 and five biological repeats of P.aeruginosa PAO1 phoQ::xylE were grown in mineral medium BM2 using glucose as the carbon source and with 2mM MgSO4. Microarray experiments were done using microarray slides and protocols from TIGR on cells from mid-log phase.