Filters
Technology
Platform
SRP087576
Homo sapiens
61 Downloadable Samples
Illumina HiSeq 2000
Description
Background: The KRAS gene is mutated in about 40% of colorectal cancer (CRC) cases, which has been clinically validated as a predictive mutational marker of intrinsic resistatnce to anti-EGFR inhibitor (EGFRi) therapy. Since nearly 60% of patients with a wild type KRAS fail to respond to EGFRi treatment, there is a need to develop more reliable molecular signatures to better predict response. Here we address the challenge of adapting a gene expression signature predictive of RAS pathway activation, created using fresh frozen (FF) tissues, for use with more widely available formalin fixed paraffin-embedded (FFPE) tissues. Methods: In this study, we evaluated the translation of an 18-gene RAS pathway signature score from FF to FFPE in 54 CRC cases, using a head-to-head comparison of five technology platforms. FFPE-based technologies included the Affymetrix GeneChip (Affy), NanoString nCounter(NanoS), Illumina whole genome RNASeq (RNA-Acc), Illumina targeted RNASeq(t-RNA), and Illumina stranded Total RNA-rRNA-depletion (rRNA). Results: Using Affy_FF as the "gold" standard, initial analysis of the 18-gene RAS scores on all 54 samples shows varying pairwise Spearman correlations, with (1) Affy_FFPE(r=0.233, p=0.090); (2) NanoS_FFPE(r=0.608, p<0.0001); (3) RNA-Acc_FFPE(r=0.175, p=0.21); (4) t-RNA_FFPE (r=-0.237, p=0.085); and (5) t-RNA (r=-0.012, p=0.93). These results suggest that only NanoString has successful FF to FFPE translation. The subsequent removal of identified "problematic" samples (n=15) and gene (n=2) further improves the correlations of Affy_FF with three of the five technologies: Affy_FFPE (r=0.672, p<0.0001); NanoS_FFPE (r=0.738, p<0.0001); and RNA-Acc_FFPE (r=0.483, p=0.002). Conclusions: Of the five technology platforms tested, NanoString technology provides a more faithful translation of the RAS pathway gene expression signature from FF to FFPE than the Affymetrix GeneChip and multiple RNASeq technologies. Moreover, NanoString was the most forgiving technology in the analysis of samples with presumably poor RNA quality. Using this approach, the RAS signature score may now be reasonably applied to FFPE clinical samples. Overall design: Fifty-four (54) FFPE evaluable tumor specimens were selected from a larger multi-center cohort of 468 well-characterized colorectal adenocarcinoma patients whose tissues were obtained between October 2006 and September 2010 at the University of South Florida. The sample cohort was composed of tumor samples that were available as matched fresh-frozen (FF) and formalin-fixed paraffin-embedded (FFPE) pairs.
Publication Title
Adaptation of a RAS pathway activation signature from FF to FFPE tissues in colorectal cancer.
Sample Metadata Fields
Specimen part, Subject
View Samples- Homo sapiens
- 18 Downloadable Samples
- Illumina Genome Analyzer IIx
Description
Small RNA-seq on MCF10A, HCT116 and HCT116p53-/- cell lines after induction of DNA damage (5 Gy Irradiation). Overall design: Small RNA-seq on MCF10A, HCT116 and HCT116p53-/- at 4 and 24 hours after induction of DNA damage (5 Gy Irradiation), done in duplicate with respective control (0 hour) using illumina Genome Analyzer IIx
Publication Title
p53 shapes genome-wide and cell type-specific changes in microRNA expression during the human DNA damage response.
Sample Metadata Fields
Cell line, Treatment, Subject, Time
View Samples- Homo sapiens
- 28 Downloadable Samples
- Illumina HiSeq 2500
Description
Pluripotent stem cells can switch their unique metabolic requirements to facilitate cellular changes but it is not clear if adult stem cells utilize metabolism in a similar manner. Here we studied the metabolism of a human adult stem cell: dental pulp stem cells (DPSCs). The dental pulp from third molars of a diverse patient group was surgically extracted, generating cells that had a high percentage of mesenchymal stem cell markers CD29, CD44, CD146 and Stro1 and had the ability to differentiate into osteogenic and adipogenic lineages. Through RNA seq analysis we identified homeobox protein, Barx1, as a marker for DPSCs. Furthermore, using high throughput proteomic analysis we identified markers for DPSC populations with accelerated replicative senescence. In particular, we show that the transforming growth factor-beta (TGF-ß) pathway and the proteins associated with muscle contraction are upregulated in rapid aging DPSCs, indicating a loss of stem cell characteristics and spontaneous initiation of terminal differentiation. Importantly, using metabolic flux analysis, we identified a metabolic signature for the rapid aging DPSCs. This metabolic signature can be used to predict the onset of replicative senescence phenotypes. Hence, the present study identifies Barx1 as a DPSCs marker and dissects the first predictive metabolic signature for DPSCs aging. Overall design: We did RNA-seq of dental pulp stem cells (DPSC) using our own approach (ID# 29, 43, 44, 45), as well as commercial DPSC and mesenchymal stem cells (MCS) from Lonza.
Publication Title
Metabolism as an early predictor of DPSCs aging.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 6 Downloadable Samples
Illumina MouseWG-6 v2.0 expression beadchip
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
LPS independent activation of the pro-inflammatory receptor Trem1 by C/EBPε in granulocytes.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
To identify target genes of C/EBPepsilon in differentiated granulocytes, total RNA were purified from sorted Gr-1intermediate/Mac-1+ and Gr-1hi/Mac-1+ cells of C/EBPepsilon knock out and C57BL/6 wild type mice using RNeasy Mini Kit (Qiagen). The differences of their expression pattern were compared with Illumina Mouse WG-6v2 Expression Chip platform. Raw Illumina BeadArray data in IDAT format were preprocessed using the open-source Bioconductor package illuminaio with the Illumina array design formation BGX file downloaded from NCBI, GEO accession: GPL6887. Following the preprocessing, the expression data were normalized by applying control background correction, log transformation and inter-quantile normalization using the neqc function from the limma bioconductor package. This allowed us to compare the transcriptomic consequences of C/EBPepsilon in two independent populations.
Publication Title
LPS independent activation of the pro-inflammatory receptor Trem1 by C/EBPε in granulocytes.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 8 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Cancer cell motility and invasiveness are fundamental characteristics of the malignant phenotype and are regulated through diverse signaling networks involving kinases and transcription factors. In this study, we identify a nuclear hormone receptor (ER)-protein kinase (ERK5)-cofilin (CFL1) network that specifies the degree of breast cancer cell aggressiveness through coupling of actin reorganization and hormone receptor-mediated transcription. Using dominant negative and constitutively active forms, as well as small molecule inhibitors of ERK5 and MEK5, we show that hormone activation of estrogen receptor- determines the nuclear versus cytoplasmic localization of the MAPK family member ERK5, which functions as a coregulator of ER-gene transcription.
Publication Title
Novel roles for ERK5 and cofilin as critical mediators linking ERα-driven transcription, actin reorganization, and invasiveness in breast cancer.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 6 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We analyzed the global gene expression pattern of Tregs between healthy donors and prostate cancer patients. We found that genes related to cell cycle, cellular proliferation, immune responses, hematological system development and function were differentially expressed in Tregs from prostate cancer patients.
Publication Title
Up-regulation of proliferative and migratory genes in regulatory T cells from patients with metastatic castration-resistant prostate cancer.
Sample Metadata Fields
Specimen part, Disease stage
View Samples- Homo sapiens
- 39 Downloadable Samples
- Illumina HiSeq 2500
Description
Microglia play important roles in developmental and homeostatic brain function, and influence the establishment and progression of many neurological disorders. Here, we demonstrate that renewable human iPSCs can be efficiently differentiated to microglial-like cells (iMGL) to study neurological diseases, such as Alzheimer''s disease (AD). We find that iMGLs develop in vitro similarly to microglia in vivo and whole transcriptome analysis demonstrates that they are highly similar to adult and fetal human microglia. Functional assessment of iMGLs reveal that they secrete cytokines in response to inflammatory stimuli, migrate and undergo calcium transients, and robustly phagocytose CNS substrates. We also show novel use of iMGLs to examine the effects of fibrillar Aß and brain-derived tau oligomers on AD-related gene expression and to interrogate mechanisms involved in synaptic pruning. Taken together, these findings demonstrate that iMGLs can be used in high-throughput studies of microglial function, providing important new insight into human neurological disease. Overall design: Human cells were collected and analyzed for gene expression using RNA-seq.
Publication Title
iPSC-Derived Human Microglia-like Cells to Study Neurological Diseases.
Sample Metadata Fields
Specimen part, Subject
View Samples- Homo sapiens
- 30 Downloadable Samples
- Affymetrix Human Genome U133A 2.0 Array (hgu133a2)
Description
The nuclear hormone receptor, estrogen receptor-alpha (ER), and MAP kinases both play key roles in hormone-dependent cancers, yet their interplay and the integration of their signaling inputs remain poorly understood. In these studies, we document that estrogen-occupied ER activates and interacts with ERK2, a downstream effector in the MAPK pathway, resulting in ERK2 and ER colocalization at chromatin binding sites across the genome of breast cancer cells.
Publication Title
Genomic collaboration of estrogen receptor alpha and extracellular signal-regulated kinase 2 in regulating gene and proliferation programs.
Sample Metadata Fields
Disease, Disease stage, Cell line, Time
View Samples- Mus musculus
- 23 Downloadable Samples
- Affymetrix Mouse Expression 430A Array (moe430a)
Description
Exposure to ultraviolet (UV) irradiation is the major cause of nonmelanoma skin cancer, the most common form of cancer in the United States. UV irradiation has a variety of effects on the skin associated with carcinogenesis, including DNA damage and effects on signal transduction. The alterations in signaling caused by UV regulate inflammation, cell proliferation, and apoptosis. UV also activates the orphan receptor tyrosine kinase and proto-oncogene Erbb2 (HER2/neu). In this study, we demonstrate that the UV-induced activation of Erbb2 regulates the response of the skin to UV. Inhibition or knockdown of Erbb2 before UV irradiation suppressed cell proliferation, cell survival, and inflammation after UV. In addition, Erbb2 was necessary for the UV-induced expression of numerous proinflammatory genes that are regulated by the transcription factors nuclear factor-kappaB and Comp1, including interleukin-1beta, prostaglandin-endoperoxidase synthase 2 (Cyclooxygenase-2), and multiple chemokines. These results reveal the influence of Erbb2 on the UV response and suggest a role for Erbb2 in UV-induced pathologies such as skin cancer.
Publication Title
Erbb2 regulates inflammation and proliferation in the skin after ultraviolet irradiation.
Sample Metadata Fields
No sample metadata fields
View Samples