Vertebrates are colonized at birth by complex microbial communities (microbiota) that influence diverse aspects of host biology. We have used a functional genomics approach to identify zebrafish genes that are differentially expressed in response to the microbiota. We assessed RNA expression profiles from zebrafish larvae at 6 days post-fertilization (dpf) that were either raised continuously in the absence of any microorganism (germ-free or GF), or raised GF through 3dpf then colonized with a normal zebrafish microbiota (conventionalized or CONVD).
Microbial colonization induces dynamic temporal and spatial patterns of NF-κB activation in the zebrafish digestive tract.
Age, Specimen part
View SamplesRNA sequencing analysis of gene expression in serrated colon polyps, uninvolved colon and control colon Overall design: 86 colon RNA sequencing datasets (21 sessile serrated adenomas/polyps, 10 hyperplastic polyps, 10 adenomatous polyps, 21 uninvolved colon, 20 control colon and 4 colon cancer)
Gene Signature in Sessile Serrated Polyps Identifies Colon Cancer Subtype.
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View SamplesRNA-sequencing of SSP RNA from patients with serrated polyposis syndrome identifies VSIG1 and MUC17 as potential diagnostic markers for SSPs Overall design: 5'' capped RNA from seven ascending SSPs, six patient matched uninvolved right colon and two normal right colon samples was used for RNA sequencing (15 samples total)
RNA sequencing of sessile serrated colon polyps identifies differentially expressed genes and immunohistochemical markers.
Sex, Disease, Subject
View SamplesGenome-wide approach to identify the cell-autonomous role of Snf2h in lens fiber cell terminal differentiation. Differential gene expression was analyzed in Snf2h lens-conditional knockout and wildtype newborn mouse eyeballs, with subsequent comparison of this data with the Brg1 lens-conditional knockout mouse eyes expression data (GSE25168).
Chromatin remodeling enzyme Snf2h regulates embryonic lens differentiation and denucleation.
No sample metadata fields
View SamplesAbstract
Gene expression patterns define key transcriptional events in cell-cycle regulation by cAMP and protein kinase A.
No sample metadata fields
View SamplesRhoGDIbeta (ARHGDIB) is often expressed in tumor cells. It negatively regulates Rho-GTPases, but may have other functions as well. To analyze its effect on gene expression, RhoGDIbeta was suppressed by RNA interference in MDA-MB-231 breast cancer cells and changes in gene expression monitored by cDNA microarrays.
Cyclooxygenase-2 is a target gene of rho GDP dissociation inhibitor beta in breast cancer cells.
No sample metadata fields
View SamplesThis study addresses long-term effects of clinically relevant regimens of radiation in human glioma stem cells. Our investigations reveal a strikingly diverse spectrum of changes in cell behavior, gene expression patterns and tumor-propagating capacities evoked by radiation in different types of glioma stem cells. Evidence is provided that degree of cellular plasticity but not the propensity to self-renew is an important factor influencing radiation-induced changes in the tumor-propagating capacity of glioma stem cells. Gene expression analyses indicate that paralell transcriptomic responses to radiation underlie similarity of clinically relevant cellular outcomes such as the ability to promote tumor growth after radiation. Our findings underscore the importance of longitudinal characterizations of molecular and cellular responses evoked by cytotoxic treatrments in glioma stem cells.
Diversity of Clinically Relevant Outcomes Resulting from Hypofractionated Radiation in Human Glioma Stem Cells Mirrors Distinct Patterns of Transcriptomic Changes.
Treatment
View SamplesPhosphatidylcholine transfer protein (PC-TP, a.k.a StarD2) is abundantly expressed in liver and is regulated by PPAR. When fed the synthetic PPAR ligand fenofibrate, Pctp-/- mice exhibited altered lipid and glucose homeostasis. Microarray profiling of liver from fenofibrate fed wild type and Pctp-/- mice revealed differential expression of a broad array of metabolic genes, as well as their regulatory transcription factors. Because its expression controlled the transcriptional activities of both PPAR and HNF4 in cell culture, the broader impact of PC-TP on nutrient metabolism is most likely secondary to its role in fatty acid metabolism.
Regulatory role for phosphatidylcholine transfer protein/StarD2 in the metabolic response to peroxisome proliferator activated receptor alpha (PPARalpha).
Sex, Age, Specimen part
View SamplesRNA sequencing of duodenal polyps in FAP patients treated with plabebo or the drug combination, erlotinib + sulindac Overall design: 69 duodenal RNA sequencing datasets (17 baseline uninvolved from 17 FAP patients, 10 endpoint uninvolved and 16 polyp from 10 FAP patients on placebo, 10 endpont uninvolved and 16 polyp from 10 FAP patients on drug)
Chemoprevention with Cyclooxygenase and Epidermal Growth Factor Receptor Inhibitors in Familial Adenomatous Polyposis Patients: mRNA Signatures of Duodenal Neoplasia.
Specimen part, Treatment, Subject, Time
View SamplesThe androgen receptor (AR) is a ligand-inducible transcription factor that mediates androgen action in target tissues. Upon ligand binding, the AR binds to thousands of genomic loci and activates a cell-type specific gene program. Prostate cancer growth and progression depend on androgen-induced AR signalling. Treatment of advanced prostate cancer through medical or surgical castration leads to initial response and durable remission, but resistance inevitably develops. In castration-resistant prostate cancer (CRPC), AR activity remains critical for tumor growth despite androgen deprivation. While previous studies have focused on ligand-dependent AR signalling, in this study we explore AR function under the androgen-deprived conditions characteristic of CRPC. Our data demonstrate that the AR persistently occupies a distinct set of genomic loci after androgen deprivation in CRPC. These androgen-independent AR occupied regions have constitutively open chromatin structures that lack the canonical androgen response element and are independent of FoxA1, a transcription factor involved in ligand-dependent AR targeting. Many AR binding events occur at proximal promoters, which can act as enhancers to augment transcriptional activities of other promoters through DNA looping. We further show that androgen-independent AR binding directs a distinct gene expression program in CRPC, which is necessary for the growth of CRPC after androgen withdrawal. Overall design: LNCaP, C4-2B, or 22RV1 cells were cultured in hormone-free media for 3 days and then treated with ethanol vehicle or DHT (10nM) for 4h or 16h prior to ChIP-seq or RNA-seq assays. For siRNA transfection, cells were transfected with AR siRNA or control siRNA for 3 days prior to RNA-seq assays.
Androgen receptor-mediated downregulation of microRNA-221 and -222 in castration-resistant prostate cancer.
No sample metadata fields
View Samples