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GSE58862
Pseudomonas aeruginosa
20 Downloadable Samples
Affymetrix Pseudomonas aeruginosa Array (paeg1a)
Description
DNA microarray analysis was employed to investigate the transcriptome response to nitric oxide in Pseudomonas aeruginosa. We focused on the role played by the nitric oxide-response regulators DNR and FhpR and an oxygen-response regulator ANR in the response.
Publication Title
Fine-tuned regulation of the dissimilatory nitrite reductase gene by oxygen and nitric oxide in Pseudomonas aeruginosa.
Sample Metadata Fields
No sample metadata fields
View Samples- Pseudomonas aeruginosa
- 4 Downloadable Samples
- Affymetrix Pseudomonas aeruginosa Array (paeg1a)
Description
To investigate the gene expression profile of pellicle cells of Pseudomonas aeruginosa, microarray analysis was performed. Transcriptome profiles of pellicle cells and planktonic cells grown in LB medium were determined by Affymetrix GeneChip. Gene expression pattern that is specific to pellicle cells was evaluated by comparing the data set with that of planktonic cells.
Publication Title
Trade-off between oxygen and iron acquisition in bacterial cells at the air-liquid interface.
Sample Metadata Fields
No sample metadata fields
View Samples- Danio rerio
- 27 Downloadable Samples
Illumina HiSeq 2500
Description
Acromegaly is a pathological condition due to excess growth hormone (GH) secretion. Acromegaly patients exhibit a deterioration of health and many associated complications, such as cardiovascular issues, arthritis, kidney diseases, muscular weakness, and colon cancer. Since these complications are generalized throughout the body, we investigated the effect of GH excess on cellular integrity. Here, we established stable acromegaly model zebrafish lines that overexpress tilapia GH and the red fluorescence protein (RFP) reporter gene for tracking GH gene expression throughout generations, and performed RNA-Seq data analysis from different organs. Intriguingly, heatmap and Expression2Kinases (X2K) analysis revealed the enrichment of DNA damage markers in various organs. Moreover, H2A.X immunostaining analysis in acromegaly zebrafish larvae and the adult acromegaly model brain and muscle showed a robust increase in the number of DNA-damaged cells. Using Gene Set Enrichment Analysis (GSEA), we found that the acromegaly zebrafish model had impaired DNA repair pathways in the liver, such as double-strand break (DSB), homologous recombination repair (HRR), non-homologous end joining (NHEJ), nucleotide excision repair (NER), and translesion synthesis (TLS). Interestingly, the impairment of DNA repair was even more prominent in acromegaly model than in aged zebrafish (three years old). Thus, our study demonstrates that affection of cellular integrity is characteristic of acromegaly Overall design: Total mRNA obtained from 1-years old acromegaly zebrafish model muscle, brain, kidney, liver and 3-day old larvae compared to wild-type (WT) zebrafish were generated by deep sequencing using Illumina.
Publication Title
An Acromegaly Disease Zebrafish Model Reveals Decline in Body Stem Cell Number along with Signs of Premature Aging.
Sample Metadata Fields
Age, Specimen part, Subject
View Samples- Pseudomonas aeruginosa
- 12 Downloadable Samples
- Affymetrix Pseudomonas aeruginosa Array (paeg1a)
Description
To assess the role of two redox-sensitive transcriptional regulators, RoxSR and ANR, in Pseudomonas aeruginosa under aerobic conditions, microarray analysis was performed. Transcriptome profiles of roxSR mutant and anr mutant aerobically grown in LB medium were determined by Affymetrix GeneChip at both the exponential phase and early stationary phase and compared to that of the wild type strain.
Publication Title
Differential expression of multiple terminal oxidases for aerobic respiration in Pseudomonas aeruginosa.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 29 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Ewings sarcoma is highly malignant bone tumor that involves childhood and adolescent, and its nature has not been well understood. To clarify its cellular origin and the mechanisms of tumorigenesis, we used ex vivo approach to create a murine model for Ewings sarcoma. The osteochondrogenic progenitors derived from the embryonic superficial zone (eSZ, designated as FZ in the data set) of murine long bones at late gestation were purified by microdissection, introduced with EWS-FLI1 or EWS-ERG retroviruses and transplanted into nude mice. Ewings sarcoma-like small round cell sarcoma developed at 100% penetrance, whereas tumor induction was less effective when growth place (GP)-derived cells were used. The different response of gene expression to EWS-FLI1 between eSZ and GP cells suggests importance of the specific cellular context for EWS-FLI1 to induce Ewings sarcoma. The Wnt/-catenin pathway was involved in close relationship to the cellular context, with Dkk2 and Wipf1 as important downstream modulators. Furthermore, gene expression profiling revealed similarity between our models and human Ewings sarcoma. These results indicate that Ewings sarcoma originates from the embryonic osteochondrogenic progenitor.
Publication Title
Ewing's sarcoma precursors are highly enriched in embryonic osteochondrogenic progenitors.
Sample Metadata Fields
Specimen part, Time
View Samples- Mus musculus
- 20 Downloadable Samples
- Illumina HiSeq 2000
Description
Alas2 gene encodes the rate-limiting enzyme in heme biosynthesis. CRISPR/Cas9-mediated ablation of two Alas2 intronic cis-elements strongly reduced GATA-1-induced Alas2 transcription, heme biosynthesis, and GATA-1 regulation of other vital constituents of the erythroid cell transcriptome. Bypassing Alas2 function in Alas2 cis-element-mutant (double mutant) cells by providing its catalytic product 5-aminolevulinic acid (5-ALA) rescued heme biosynthesis and the GATA-1-dependent genetic network. We discovered a GATA factor- and heme-dependent circuit that establishes the erythroid cell transcriptome. Overall design: G1E-ER-GATA-1 WT and double mutant cells were examined. Untreated WT, beta-estradiol-treated WT, beta-estradiol-treated double-mutant, and beta-estradiol/5-ALA-treated double-mutant cells were subjected to RNA-seq.
Publication Title
Mechanism governing heme synthesis reveals a GATA factor/heme circuit that controls differentiation.
Sample Metadata Fields
Treatment, Subject
View Samples- Mus musculus
- 10 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Ewings sarcoma is highly malignant bone tumor that involves childhood and adolescent, and its nature has not been well understood. To clarify its cellular origin and the mechanisms of tumorigenesis, we used ex vivo approach to create a murine model for Ewings sarcoma. The osteochondrogenic progenitors derived from the facial zone (FZ) of murine long bones at late gestation were purified by microdissection, introduced with EWS-FLI1 or EWS-ERG retroviruses and transplanted into nude mice. Ewings sarcoma-like small round cell sarcoma developed at 100% penetrance, whereas tumor induction was less effective when growth place (GP)-derived cells were used. The different response of gene expression to EWS-FLI1 between FZ and GP cells suggests importance of the specific cellular context for EWS-FLI1 to induce Ewings sarcoma. The Wnt/-catenin pathway was involved in close relationship to the cellular context, with Dkk2 and Wipf1 as important downstream modulators. Furthermore, gene expression profiling revealed similarity between our models and human Ewings sarcoma. These results indicate that Ewings sarcoma originates from the embryonic osteochondrogenic progenitor.
Publication Title
Ewing's sarcoma precursors are highly enriched in embryonic osteochondrogenic progenitors.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 9 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Rett syndrome (RTT) is a devastating neurodevelopmental disorder that occurs once in every 10,000-15,000 live female births. Despite intensive research, no effective cure is yet available. Valproic acid (VPA) has been used widely to treat mood disorder, epilepsy, and a growing number of other disorders. In limited clinical studies, VPA has also been used to control seizure in RTT patients with promising albeit somewhat unclear efficacy. In this study we tested the effect of VPA on the neurological symptoms of RTT and discovered that short-term VPA treatment during the symptomatic period could reduce neurological symptoms in RTT mice. We found that VPA restores the expression of a subset of genes in RTT mouse brains, and these genes clustered in neurological disease and developmental disorder networks. Our data suggest that VPA could be used as a drug to alleviate RTT symptoms.
Publication Title
VPA alleviates neurological deficits and restores gene expression in a mouse model of Rett syndrome.
Sample Metadata Fields
Specimen part
View Samples- Xenopus laevis
- 9 Downloadable Samples
- Affymetrix Xenopus laevis Genome Array (xenopuslaevis)
Description
Percellome analysis of whole Xenopus embryos at developmental stage 18
Publication Title
Active repression by RARγ signaling is required for vertebrate axial elongation.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 5 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Metabolism is tightly coupled with the process of aging, and tumorigenesis. However, the mechanisms regulating metabolic properties in different contexts remain unclear. Cellular senescence is widely recognized as an important tumor suppressor function and accompanies metabolic remodeling characterized by increased mitochondrial oxidative phosphorylation (OXPHOS). Here we showed retinoblastoma (RB) is required for the increased OXPHOS in oncogene-induced senescent (OIS) cells. Combined metabolic and gene expression profiling revealed that RB mediated activation of the glycolytic pathway in OIS cells, causing upregulation of several glycolytic genes and concomitant increases in the levels of associated metabolites in the glycolytic pathway. Knockdown of these genes by small interfering RNAs (siRNAs) resulted in decreased mitochondrial respiration, suggesting that RB-mediated glycolytic gene activation promotes metabolic flux into the OXPHOS pathway. These results suggest that coordinate transcriptional activation of metabolic genes by RB enables OIS cells to maintain metabolically bivalent states that both glycolysis and OXPHOS are highly active. Collectively, our findings demonstrated a previously unrecognized function of RB in OIS cells.
Publication Title
Retinoblastoma protein promotes oxidative phosphorylation through upregulation of glycolytic genes in oncogene-induced senescent cells.
Sample Metadata Fields
Cell line, Treatment
View Samples