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Rattus norvegicus
6 Downloadable Samples
Affymetrix Rat Genome 230 2.0 Array (rat2302)
Description
Microglia, the resident immune cells of the central nervous system (CNS), have two distinct phenotypes in the developing brain: amoeboid form, known to be amoeboid microglial cells (AMC) and ramified form, known to be ramified microglial cells (RMC) alongside several intermediate forms. The AMC are characterized by being proliferative, phagocytic and migratory whereas the RMC are quiescent and exhibit a slow turnover rate. The AMC transform into RMC with advancing age, and this transformation is indicative of the gradual shift in the microglial functions. Both AMC and RMC respond to CNS inflammation, and they become hypertrophic when they are activated by trauma, infection or neurodegenerative stimuli. The molecular mechanisms and functional significance of morphological transformation of microglia during normal development and in disease conditions is not clear. It is hypothesized that AMC and RMC are functionally regulated by a specific set of genes encoding various signaling molecules and transcription factors. To address this, we carried out cDNA microarray analysis using lectin-labeled AMC and RMC isolated from frozen tissue sections of the corpus callosum of 5-day and 4-week old rat brain respectively, by laser capture microdissection (LCM). The global gene expression profiles of both microglial phenotypes were compared and the differentially expressed genes in AMC and RMC were clustered based on their functional annotations. This genome wide comparative analysis helps in identifying genes that are specific to AMC and RMC. The novel and specific molecules identified in both microglial phenotypes can be targeted for therapeutic purposes in developing and adult brain diseases.
Publication Title
Transcriptome analysis of amoeboid and ramified microglia isolated from the corpus callosum of rat brain.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 13 Downloadable Samples
IlluminaHiSeq2500
Description
The goal of this study is to compare the transcriptome of the 2 MVT1 subpopulations in order to identify new genes and pathways that stands beyond the CD24+ aggressive phenotype Overall design: mRNA profiles of CD24- and CD24+ cells were generated by deep sequencing, in triplicate, using Illumina HiSeq 2500
Publication Title
Deep sequencing of mRNA in CD24(-) and CD24(+) mammary carcinoma Mvt1 cell line.
Sample Metadata Fields
No sample metadata fields
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SRP012695- Homo sapiens
- 3 Downloadable Samples
- Illumina HiSeq 2000
Description
Analysis of mRNA in THP1 (human monocytic leukemia) cell line in order to correlate miRNA activity with target abundance. Overall design: THP1 mRNA profiles were generated in triplicates by deep-sequencing in Illumina HiSeq2000.
Publication Title
High-throughput assessment of microRNA activity and function using microRNA sensor and decoy libraries.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Caenorhabditis elegans
- 3 Downloadable Samples
- Affymetrix C. elegans Genome Array (celegans)
Description
Bio-electrospray, the direct jet-based cell handling apporach, is able to handle a wide range of cells. Studies at the genomic, genetic, and the physiological level have shown that, post-treatment, cellular integrity is unperturbed and a high percentage (>70%, compared to control) of cells remain viable. Although, these results are impressive, it may be argued that cell based systems are oversimplistic. This study utilizing a well characterised multicellular model organism, the non-parasitic nematode Caenorhabditis elegans. Nematodes were subjected to bio-electrosprays to demonstrate that bio-electrosprays can be safely applied to nematodes.
Publication Title
Bio-electrospraying the nematode Caenorhabditis elegans: studying whole-genome transcriptional responses and key life cycle parameters.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 70 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Management of severe asthma remains a challenge despite treatment with glucocorticosteroid therapy. The majority of studies investigating disease mechanisms in treatment-resistant severe asthma have previously focused on the large central airways, with very few utilizing transcriptomic approaches. The small peripheral airways, which comprise the majority of the airway surface area, remain an unexplored area in severe asthma and were targeted for global epithelial gene expression profiling in this study.
Publication Title
Altered Epithelial Gene Expression in Peripheral Airways of Severe Asthma.
Sample Metadata Fields
Sex, Age, Specimen part, Disease, Subject
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430A 2.0 Array (mouse430a2)
Description
Diverse functions of the homeodomain transcription factor BARX1 include Wnt-dependent, non-cell autonomous specification of the stomach epithelium, tracheo-bronchial septation, and Wnt-independent expansion of the spleen primordium. Tight spatio-temporal regulation of Barx1 levels in the mesentery and stomach mesenchyme suggests additional roles. To determine these functions, we forced constitutive BARX1 expression in the Bapx1 expression domain, which includes the mesentery and intestinal mesenchyme, and also examined Barx1-/- embryos in further detail. Transgenic embryos invariably showed intestinal truncation and malrotation, in part reflecting abnormal left-right patterning. Ectopic BARX1 expression did not affect intestinal epithelium, but intestinal smooth muscle developed with features typical of the stomach wall. BARX1, which is normally restricted to the developing stomach, drives robust smooth muscle expansion in this organ by promoting proliferation of myogenic progenitors at the expense of other sub-epithelial cells. Undifferentiated embryonic stomach and intestinal mesenchyme showed modest differences in mRNA expression and BARX1 was sufficient to induce much of the stomach profile in intestinal cells. However, limited binding at cis-regulatory sites implies that BARX1 may act principally through other transcription factors. Genes expressed ectopically in BARX1+ intestinal mesenchyme and reduced in Barx1-/- stomach mesenchyme include Isl1, Pitx1, Six2 and Pitx2, transcription factors known to control left-right patterning and influence smooth muscle development. The sum of evidence suggests that potent BARX1 functions in intestinal rotation and stomach myogenesis occur through this small group of intermediary transcription factors.
Publication Title
Control of stomach smooth muscle development and intestinal rotation by transcription factor BARX1.
Sample Metadata Fields
Specimen part
View Samples- Escherichia coli
- 8 Downloadable Samples
- Affymetrix E. coli Genome 2.0 Array (ecoli2)
Description
VS94 gene expression at different time-points in SAPI medium in absence and presence of AI-2 was studied.
Publication Title
Temporal regulation of enterohemorrhagic Escherichia coli virulence mediated by autoinducer-2.
Sample Metadata Fields
No sample metadata fields
View Samples- Drosophila melanogaster
- 8 Downloadable Samples
- Illumina HiSeq 2000
Description
Transcriptional regulation by Store-operated Calcium Entry (SOCE) is well studied in non-excitable cells. However, the role of SOCE has been poorly documented in neuronal cells with more complicated calcium dynamics. Previous reports demonstrated a requirement of neuronal SOCE for Drosophila flight. We identified the early pupal stage to be critical and used RNA-sequencing to identify SOCE mediated gene expression changes in the developing Drosophila pupal nervous system. We down-regulated dStim, the endoplasmic reticular calcium sensor and a principal component of SOCE in the nervous system for a 24h period during pupal development, and compared wild type and knockdown transcriptional profiles, immediately after knockdown as well as after a 36h recovery period. We found that dStim knockdown altered the expression of a number of genes. We also characterized one of the down-regulated genes, Ral for its role in flight. Thus, we identify neuronal SOCE as a mechanism that regulates expression of a number of genes during the development of the pupal nervous system. These genes can be further studied in the context of pupal nervous system development. Overall design: mRNA sequencing from two biological replicates each of wild type and dStim knockdown pupal brains at two time points - 36h APF (post 24h knockdown) and at 72h APF (Post knockdown and recovery)
Publication Title
A pupal transcriptomic screen identifies Ral as a target of store-operated calcium entry in Drosophila neurons.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 4 Downloadable Samples
- IlluminaHiSeq2500
Description
Here we explored how the human macrophage response to tumor necrosis factor (TNF) is regulated by human synovial fibroblasts, the representative stromal cell type in the synovial lining of joints that become activated during inflammatory arthritis. Genome-wide transcriptome analysis (RNAseq) showed that co-cultured synovial fibroblasts modulate the expression of approximately one third of TNF-inducible genes in macrophages, including expression of target genes in pathways important for macrophage survival and polarization towards an alternatively activated phenotype. This work furthers our understanding of the interplay between innate immune and stromal cells during an inflammatory response, one that is particularly relevant to inflammatory arthritis. Our findings also identify modulation of macrophage phenotype as a new function for synovial fibroblasts that may prove to be a contributing factor in arthritis pathogenesis. Overall design: Human CD14+ MCSF-differentiated macrophages were cultured with or without synovial fibroblasts in transwell chambers. TNF was added at Day 0, macrophages were harvested at Day 2. Total of 4 samples: (1) macrophages alone (2) macrophages with fibroblasts (3) macrophages with TNF (4) macrophages with fibroblasts and TNF. Macrophage RNA was purified using RNeasy mini kit (Qiagen). Tru-seq sample preparation kits (Illumina) were used to purify poly-A transcripts and generate libraries with multiplexed barcode adaptors. All samples passed quality control on a Bioanalyzer 2100 (Agilent). Paired-end reads (50 x 2 cycles, ~75x106 reads per sample) were obtained on an Illumina HiSeq 2500. The TopHat program was used to align the reads to the UCSC Hg19 human reference genome, while the Cufflinks program allowed for measurements of transcript abundance (represented by Fragments Per Kilobase of exon model per Million mapped reads (FPKM)).
Publication Title
Modulation of TNF-induced macrophage polarization by synovial fibroblasts.
Sample Metadata Fields
No sample metadata fields
View Samples GSE6195- Escherichia coli
- 4 Downloadable Samples
- Affymetrix E. coli Genome 2.0 Array (ecoli2)
Description
For the microarray experiments, 10 g glass wool (Corning Glass Works, Corning, N.Y.) were used to form biofilms (30) in 250 mL in 1 L Erlenmeyer shake flasks which were inoculated with overnight cultures diluted that were 1:100. For EHEC with 7-hydroxyindole and isatin, 1000 mM 7-hydroxyindole in 250 mL DMF, 250 mM isatin in 250 mL DMF, or 250 mL DMF alone were added to cells grown in LB. The cells were shaken at 250 rpm and 30C for 7 hours to form biofilms on the glass wool, and RNA was isolated from the suspension cells and the biofilm.
Publication Title
Enterohemorrhagic Escherichia coli biofilms are inhibited by 7-hydroxyindole and stimulated by isatin.
Sample Metadata Fields
No sample metadata fields
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