Changes in gene expression on MNV infection of RAW264.7 cells
Murine norovirus replication induces G0/G1 cell cycle arrest in asynchronously growing cells.
Cell line
View SamplesIn this study, we have utilized microarray analysis to directly compare a subset of structurally distinct, clinically relevant SERMs in the presence and absence of estradiol, using a high replicate number (10) to ensure detection of modestly regulated genes.
Research resource: Transcriptional profiling in a cellular model of breast cancer reveals functional and mechanistic differences between clinically relevant SERM and between SERM/estrogen complexes.
Cell line
View SamplesIn order to validate the utility of a novel pathway algorithm (BD-Func), we test if an LBH589 signature based data from 3 cell lines (GSE36509) in an independent experiment in vivo.
BD-Func: a streamlined algorithm for predicting activation and inhibition of pathways.
Specimen part, Treatment
View SamplesStaphylococcus aureus pneumonia causes significant morbidity and mortality. Alpha-hemolysin (Hla), a pore-forming cytotoxin of S. aureus, has been identified through animal models of pneumonia as a critical virulence factor that induces lung injury. In spite of considerable molecular knowledge of how this cytotoxin injures the host, the precise host response to Hla in the context of infection remains poorly understood. We employed whole-genome expression profiling of infected lung to define the host response to wild-type S. aureus compared with an Hla-deficient isogenic mutant in experimental pneumonia. These data provide a complete expression profile at four and at twenty-four hours post-infection, revealing a unique response to the toxin-expressing strain. Gene ontogeny analysis revealed significant differences in the extracellular matrix and cardiomyopathy pathways, both of which govern cellular interactions in the tissue microenvironment. Evaluation of individual transcript responses to Hla-secreting bacteria was notable for upregulation of host cytokine and chemokine genes, including the p19 subunit of interleukin-23. Consistent with this observation, the cellular immune response to infection was characterized by a prominent TH17 response to wild-type staphylococci. These findings define specific host mRNA responses to Hla-producing S. aureus, coupling the pulmonary TH17 response to the presence of this cytotoxin. Expression profiling to define the host response to a single virulence factor proved to be a valuable tool in identifying pathways for further investigation in S. aureus pneumonia. This approach may be broadly applicable to the study of bacterial toxins, defining host pathways that can be targeted to mitigate toxin-induced disease.
Host response signature to Staphylococcus aureus alpha-hemolysin implicates pulmonary Th17 response.
Sex, Specimen part
View SamplesCOHCAP (City of Hope CpG Island Analysis Pipeline) is an algorithm to analyze single-nucleotide resolution DNA methylation data. It provides QC metrics, differential methylation for CpG Sites, differential methylation for CpG Islands, integration with gene expression data, and visualization of methylation values. COHCAP is currently the only DNA methylation package that can handle integration with gene expression data, and the results of this study show that COHCAP can identify regions of differential methylation with ~50% concordance with gene expression. COHCAP is scalable for analysis of both cell line data and heterogeneous patient data, and it can identify known cancer biomarkers as well as intriguing new roles of epigenetic regulation in cancer (such as methylation of estrogen receptor in breast cancer patients). This study also uses cell line data to show that COHCAP is capable of analyzing Illumina methylation array and targeted bisulfite sequencing data, with either 1-group or 2-group study designs. The accuracy of COHCAP is accessed using qPCR, EpiTect, and comparison of COHCAP regions of differential methylation with MIRA peaks. This software is freely available at https://sourceforge.net/projects/cohcap/.
COHCAP: an integrative genomic pipeline for single-nucleotide resolution DNA methylation analysis.
Disease, Cell line
View SamplesGenome-wide expression and methylation differences are compared for a normal HCT116 cell line and a derived mutant with altered DNA methylation patterns.
COHCAP: an integrative genomic pipeline for single-nucleotide resolution DNA methylation analysis.
Cell line
View SamplesAffymetrix expression profiling was used to evaluate the association between IL13R2 expression, and mesenchymal, proneural, classical and neural signature genes expression for glioma subclasses defined by Verhaak et al (Cancer Cell; 2010).
Glioma IL13Rα2 is associated with mesenchymal signature gene expression and poor patient prognosis.
Cell line, Treatment
View SamplesTo obtain a comprehensive genomic profile of presenting multiple myeloma cases we performed high resolution single nucleotide polymorphism (SNP) mapping array analysis in 114 samples alongside 258 samples analysed by U133 Plus 2.0 expression array (Affymetrix). We examined DNA copy number alterations and loss of heterozygosity (LOH) in order to define the spectrum of minimally deleted regions in which relevant genes of interest can be found. The most frequent deletions are located at 1p (30%), 6q (33%), 8q (25%), 12 (22%), 13q (59%), 14q (39%), 16q (35%), 17p (7%), 20 (12%) and 22 (18%). In addition, copy number-neutral LOH, or uniparental disomy, was also prevalent on 1q (8%), 16q (9%), and X (20%), and was associated with regions of gain and loss. Based on fluorescent in situ hybridisation (FISH) and expression quartile analysis, genes of prognostic importance were found to be located at 1p (FAF1, CDKN2C), 1q (ANP32E), and 17p (TP53). In addition, we identified common homozygously deleted genes which have functions relevant to myeloma biology. Taken together, the dysregulated genes from the myeloma genome indicate that the crucial pathways in myeloma pathogenesis include the NF-?B pathway, apoptosis, cell-cycle regulation and Wnt signalling.
Aberrant global methylation patterns affect the molecular pathogenesis and prognosis of multiple myeloma.
Specimen part
View SamplesThe aim of this study is to identify the SPIN1 target genes in liposarcoma cells Overall design: Liposarcoma is one of the most common histological subtypes of soft tissue sarcoma and causes high incidence of morbidity and mortality. Since therapeutic options for liposarcoma treatment are insufficient, there is an urgent need to identify novel therapeutic targets. Here, we show that knockdown of SPIN1, a reader of H3K4me3 and H3R8me2a chromatin marks, strongly reduces proliferation and survival of liposarcoma cells in vitro and in xenograft mouse models. Combining genome-wide chromatin binding and transcriptome analyses, we found that SPIN1 in cooperation with the transcription factor MAZ directly enhances expression of GDNF, an activator of the RET signaling pathway. Accordingly, knockdown of SPIN1 results in reduced levels of GDNF and activated RET explaining diminished liposarcoma cell proliferation and survival. In line with these observations, levels of SPIN1, GDNF, and activated RET are highly increased in human liposarcoma compared to lipoma or normal adipose tissue. Importantly, SPIN1-mediated transcriptional control depends on binding to H3K4me3 suggesting that targeting of this interaction with small molecule inhibitors is a novel strategy to treat liposarcoma.
The histone code reader SPIN1 controls RET signaling in liposarcoma.
No sample metadata fields
View SamplesIn the present study, we investigated the importance of histone deacetylase 6 (HDAC6) for glucocorticoid receptor (GR) mediated effects on glucose metabolism, and its potential as a therapeutic target for the prevention of glucocorticoid (GC)-induced diabetes. Dexamethasone (dex)-induced hepatic glucose output and GR translocation were analysed in wildtype (wt) and HDAC6-deficient (HDAC6ko) mice. The effect of the specific HDAC6-inhibitor tubacin was analysed in-vitro. Wt and HDAC6ko mice were subjected to 3 weeks dex treatment before analysis of glucose and insulin tolerance. HDAC6ko mice showed impaired dex-induced hepatic GR translocation. Accordingly, dex induced expression of a large number of hepatic genes was significantly attenuated in mice lacking HDAC6 and by tubacin in-vitro. Glucose output of primary hepatocytes from HDAC6ko mice was diminished. A significant improvement of dex-induced whole-body glucose intolerance as well as insulin resistance in HDAC6ko mice compared to wt littermates was observed. The present study demonstrates that HDAC6 is an essential regulator of hepatic GC stimulated gluconeogenesis and impairment of whole body glucose metabolism through modification of GR nuclear translocation. Selective pharmacological inhibition of HDAC6 may provide a future therapeutic option against the pro-diabetogenic actions of GCs.
Histone deacetylase 6 (HDAC6) is an essential modifier of glucocorticoid-induced hepatic gluconeogenesis.
Sex, Specimen part, Treatment
View Samples