We have carried out transcriptional profile analysis in macroH2A knockdown cells (Namalwa B cells and HeLa cells) and demonstrated that this histone variant plays positive and negative roles in transcription. We also demonstrated the role of macroH2A in regulating the response to Sendai Virus infection.
Composite macroH2A/NRF-1 Nucleosomes Suppress Noise and Generate Robustness in Gene Expression.
Cell line, Treatment
View SamplesMice have been treated with NOX-A12. Whole BM cells have been harvested, RNA isolated, and gene expression profiling was performed on cDNA using Mouse Genome 430 2.0 array. Untreated mice have been used as control.
SDF-1 inhibition targets the bone marrow niche for cancer therapy.
Treatment
View SamplesIschemic preconditioning represents the most powerful mechanism of cardioprotection. The mechanisms mediating the second window of preconditioning (SWOP) differ from those mediating first window preconditioning. We hypothesized that chronic ischemia induced by repetitive ischemic stimuli would be mediated by yet different molecular mechanisms. Accordingly, conscious, chronically instrumented pigs (n=5/group) were submitted to a protocol of classical SWOP (two 10-min episodes of coronary artery occlusion followed by 24 hr reperfusion) and compared to pigs submitted to repetitive occlusion/reperfusion (RCO) by repeating 6 episodes of SWOP 12 hrs apart, and to a model of repetitive coronary stenosis (RCS), in which 6 episodes of 90 min coronary stenosis were performed 12 hrs apart. Microarray analysis was performed on the three models. There was an 85% homology in gene response between both models of RCO and RCS, whereas SWOP was qualitatively different. Both models of RCO and RCS but not SWOP showed a down-regulation of genes encoding proteins involved in oxidative metabolism, and an up-regulation of genes involved in protein synthesis and unfolded protein response, autophagy, heat shock response, protein secretion, and a strong activation of the NF-B signaling pathway. Two thirds of the genes regulated in the three models showed a gradual pattern of up- or down-regulation, in which RCO was quantitatively intermediary between RCS and SWOP. Therefore, the regulated genes in response to chronic, repetitive episodes of ischemia differ radically from classical first or second window preconditioning.
Molecular mechanisms mediating preconditioning following chronic ischemia differ from those in classical second window.
Sex, Specimen part
View SamplesMucinous tubular and spindle cell carcinoma (MTSCC) is a relatively rare subtype of renal cell carcinoma with distinctive morphologic and cytogenetic features. Here we carry out whole exome and transcriptome sequencing of a multi-institutional cohort of MTSCC (n=22). We demonstrate the presence of either biallelic loss of Hippo pathway tumor suppressor genes (TSGs) and/or evidence of alteration of Hippo pathway genes in 85% of samples. PTPN14 (31%) and NF2 (22%) were the most commonly implicated Hippo pathway genes while other genes such as SAV1 and HIPK2 were also involved in a mutually exclusive fashion. Mutations in the context of recurrent chromosomal losses amounted to bi-allelic alterations in these TSGs. As a read-out of Hippo pathway inactivation, a majority of cases (90%) exhibited increased nuclear YAP1 protein expression. To identify transcriptional targets of the Hippo pathway in kidney we performed PTPN14 knockdown followed by RNA-seq in 2 kidney cancer cell lines (CAKI-1 and A-704) and a normal kidney epithelial cell line (HK-2). PTPN14 siRNAs were first functionally validated in a MCF-7 TEAD reporter luciferase stable cell line. Both siRNAs showed comparable knockdown efficiency and significantly increased luciferase reporter activity. In 2 of the kidney cell lines PTPN14 knockdown increased cell proliferation compared to non-target controls. While we observed excellent correlation between genes dysregulated by either PTPN14 or LATS1 knockdown within each cell line (HK2, CAKI-1 and A704), the overlap across the 3 cell lines was only 23 genes. Further, these 23 genes did not show concordant differential expression in MTSCC tumors. Overall, these results illustrate the marked tissue specificity of Hippo pathway targets.Finally, taken together, nearly all cases of MTSCC exhibit some evidence of Hippo pathway dysregulation. Overall design: Cell lines (CAKI-1, HK2 or A704) were either transfected with 2 independent siRNAs or non-target controls. Forty eight hours post transcription total RNA was isolated and subjected to RNA-seq analysis
Biallelic Alteration and Dysregulation of the Hippo Pathway in Mucinous Tubular and Spindle Cell Carcinoma of the Kidney.
Specimen part, Disease, Disease stage, Cell line, Subject
View SamplesThis study examines the sites of HIV integration in quiescent CD4 T cells and compares them to activated T cells. The expression patterns of the sites hosting integration events were determined using microarray analysis data from quiescent and activated CD4 T cells.
Human immunodeficiency virus integration efficiency and site selection in quiescent CD4+ T cells.
No sample metadata fields
View SamplesTo identify the potential ovarian cancer stem cell gene expression profile from isolated side population of fresh ascites obtained from women with high-grade advanced stage papillary serous ovarian adenocarcinoma
Identification of a potential ovarian cancer stem cell gene expression profile from advanced stage papillary serous ovarian cancer.
Specimen part
View SamplesMicroarray data allowed detection of genes that are highly expressed in the pineal gland.
A new cis-acting regulatory element driving gene expression in the zebrafish pineal gland.
Sex
View SamplesMicroarray data allowed detection of genes that are induced by light in the zebrafish pineal gland
The light-induced transcriptome of the zebrafish pineal gland reveals complex regulation of the circadian clockwork by light.
Sex, Specimen part, Treatment, Time
View SamplesWe harvested the heart from transgenic mice with cardiac specific overexpression of Sirt1 (Tg-Sirt1) and non-transgenic (NTg) control littermate at 3 months of age and then microarray analyses were conducted.
Sirt1 regulates aging and resistance to oxidative stress in the heart.
No sample metadata fields
View SamplesThe molecular events at the basis of prion diseases are characterized by the involvement of several genes which are differentially regulated during the onset and the progression of the infection. Gene expression profiling studies are a powerful tool for the development of preclinical diagnostic tests. Most of the studies performed up to date utilized tissues which are not suitable for a future perspective of a rapid analysis of the infected animals and patients.
Whole Blood Gene Expression Profiling in Preclinical and Clinical Cattle Infected with Atypical Bovine Spongiform Encephalopathy.
Sex, Specimen part
View Samples