The study entails novel bio-marker discovery of Tumor Aggressive Grade signature (TAGs) genes and their role in recurrence free survival of breast cancer (BC) patients. Current BC dataset was used for co-expression analysis of TAGs genes and their role in BC progression. Additionally, recent findings have suggested an importance of structural organization of sense-antisense gene pairs (SAGPs) for transcription, post-transcriptional and post-translational events and their associations with cancer and disease. We studied SAGPs in which both gene partners are protein encoding genes (coding-coding SAGPs), their role in human BC development and demonstrated their potential for BC stratification and prognosis. Based on gene expression and correlation analyses we identified the robust set of breast cancer-relevant SAGPs (BCR-SAGPs). We isolated and characterized the sense-antisense gene signature (SAGS) and evaluated its prognostic potential in various gene expression datasets comprising 1161 BC patients. The methods used included the Cox proportional survival analysis, statistical analysis of clinicopathologic parameters and differential gene expression. The SAGS was effective in identification of BC patients with the most aggressive disease. Independently, we validated the SAGS using 58 RNA samples of breast cancer tumors purchased from OriGene Technologies (Rockville, MD).
Sense-antisense gene-pairs in breast cancer and associated pathological pathways.
Age, Disease, Disease stage
View SamplesOxidative stress is a harmful condition in a cell, tissue, or organ, caused by an imbalnace between reactive oxygen species and other oxidants and the capacity of antioxidant defense systems to remove them. The budding yeast S. cerevisiae has been the major eukaryotic model for studies of response to oxidative stress.
The genome-wide early temporal response of Saccharomyces cerevisiae to oxidative stress induced by cumene hydroperoxide.
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View SamplesRecent studies suggest vitamin D deficiency is associated with chronic lung diseases such as asthma and chronic obstructive pulmonary disease. Each of these are characterised by airway hyperresponsiveness (AHR) and airway remodeling, the latter characterized by increased airway smooth muscle (ASM) mass. In this study we investigated the biological mechanisms underlying increased ASM mass and AHR due to vitamin D deficiency via RNA-seq transcriptome analysis of female BALB/c mice at 8 weeks of age.
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View SamplesRNA expression in adipose and skin from women with polycystic ovary syndrome (PCOS) was examined using RNA sequencing (Illumina HiSeq 50 cycle single-read sequencing) as a function of the genotype at 16 PCOS genetic risk variants. We hypothesized that the tissue expression pattern in adipose and skin would help identify candidate genes and pathways that could provide insight into the underlying mechanism for risk at these loci.
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Sex, Age, Specimen part
View SamplesHigh-throughput sequencing of RNA (RNA-Seq) in human cancer shows remarkable potential to simultaneously identify expression levels of protein-coding genes and long non-coding RNAs (lncRNAs). We performed RNA-Seq to investigate expression level of lncRNAs and protein-coding genes in 30 esophageal samples, including 15 esophageal squamous cell carcinoma (ESCC) tissue samples and 15 paired non-tumor tissues. We further developed an integrative bioinformatics method, denoted URW-LPE (for unsupervised random walk with each dysregulated lncRNA/PCG), to identify key functional lncRNAs that regulate expression of downstream protein-coding genes in ESCC. By this method, multiple known cancer and novel potentially functional lncRNAs were effectively identified. Quantitative reverse-transcription PCR was performed to confirm the lncRNA expression level of eight novel functional lncRNAs in an additional 120 paired ESCC patient samples. Finally, we characterized lncRNA625 as a novel ESCC regulator of cell proliferation, invasion and migration. Moreover, we identified E1A-binding protein p300 (EP300) as playing a key role in executing lncRNA625-induced transcriptional responses. These findings establish the utility of integrative bioinformatics analyses of RNA-Seq to identify cancer-associated functional lncRNAs.
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View SamplesWe report a comprehensive large-scale expression profiling analysis of mammalian male germ cells undergoing mitotic growth, meiosis and gametogenesis using High Density Oligonucleotide Microarrays and highly enriched cell populations. Among 11955 rat loci investigated, 1268 were identified as differentially transcribed in germ cells at subsequent developmental stages as compared to total testis, somatic Sertoli cells as well as brain and skeletal muscle controls. The loci were organized into four expression clusters that correspond to somatic, mitotic, meiotic and post-meiotic cell types. This work provides information about expression patterns of approximately 200 genes known to be important during male germ cell development. Approximately 40 of those are included in a group of 121 transcripts for which we report germ cell expression and lack of transcription in three somatic control cell types. Moreover, we demonstrate the testicular expression and transcriptional induction in mitotic, meiotic and/or post-meiotic germ cells of 293 as yet uncharacterized transcripts some of which are likely to encode factors involved in spermatogenesis and fertility. This group also contains numerous potential germ cell specific targets for innovative contraceptives. A graphical display of the data is conveniently accessible through the GermOnline database at <a href="http://www.germonline.org" target="_blank">http://www.germonline.org</a>.
Expression profiling of mammalian male meiosis and gametogenesis identifies novel candidate genes for roles in the regulation of fertility.
Sex, Age, Specimen part
View SamplesCH causes perivascular inflammation, enhanced pulmonary arterial constriction and remodeling leading to the development of pulmonary hypertension. Pulmonary hypertension is a debilitating disease with a high mortality rate. CH develops in patients with chronic obstructive pulmonary disease (COPD), sleep apnea or people living at high altitude. Both COPD and sleep apnea are very prevalent and pulmonary hypertension develops in a large % of COPD and sleep apnea patients. The molecular mechanisms that underlie the development of CH-induced pulmonary hypertension are far from clear. We have previously demonstrated that CH activates the Ca2+/calcineurin-regulated transcription factor NFATc3 in PASMC and that NFATc3 is required for CH-induced pulmonary hypertension in mice. Although this work was the first to identify a role for this transcription factor in an experimental model of pulmonary hypertension, since a conventional whole animal KO was used it is unknown if PASMC NFATc3 contributes to CH-induced PH. Furthermore, the genes regulated by NFATc3 in PASMC under control and CH conditions are largely unknown.
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Sex, Age, Specimen part, Treatment
View SamplesThe transcriptome of the three atino80 allelic mutants was compared to that of wild-type and 50B Arabidopsis plants (see Fritsch et al. 2004). Since the transcriptomes of 50B and wild-type plants were found to be identical, we compared expression in the mutant with 50B and with wild-type without distinction. Therefore, we had four replicates of the wild type condition (50B line, wild-type) and two replicates for each of the mutant alleles (atino80-1, atino80-2 and atino80-3), all ecotype Columbia. All lines were profiled in duplicate (grown independently at 2-week-intervals).
The INO80 protein controls homologous recombination in Arabidopsis thaliana.
Age, Specimen part
View SamplesAnalysis of nuclear atrial gene expression in purified atrial cardiac myocyte nuclei isolated from right atrial appendages from adult patients undergoing open-heart surgery for coronary bypass or valve correction.
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Sex, Age, Specimen part
View SamplesNo description.
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