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Homo sapiens
128 Downloadable Samples
Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Colorectal cancer is one of the most common cancers in the world. Histological staging is efficient but combination with molecular markers may improve tumors classification. Gene expression profiles have been defined as prognosis predictors among stage II and III tumors but their implementation in medical practice remains controversial. Stage-II tumors have been recognized as a heterogeneous group and high-risk morphologic features have been retained as justifying adjuvant chemotherapy. We propose here the investigation of clinical features and expression profiles from stage II and stage III colon carcinomas without DNA mismatch repair defect. A series of 130 colon cancer samples was retained. Expression profiles were established on oligonucleotide microarrays and processed in the R/Bioconductor environment. Hierarchical then supervised analyses were successively performed applying the data-sampling approach. A molecular signature of seven genes was found to cluster stage III tumors with an adjusted p-values lower than 10^-10. A subgroup of stage-II tumors aggregated this cluster in both series. No correlation was found between with the disease severity but the function of the discriminating genes suggests that tumors have been classified according to their putative response to adjuvant targeted or classic therapies. Further pharmacogenetic studies might document this observation.
Publication Title
A seven-gene signature aggregates a subgroup of stage II colon cancers with stage III.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples
GSE26906- Homo sapiens
- 90 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Analysis of expression profiles in stage II colon cancer according to the APC gene status
Publication Title
Expression Profiles in Stage II Colon Cancer According to APC Gene Status.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Rattus norvegicus
- 40 Downloadable Samples
- Affymetrix Rat Genome 230 2.0 Array (rat2302)
Description
To evaluate gene expression changes in mixed tissue samples used as process controls in male Sprague Dawley rats over time.
Publication Title
Assessment of repeated microarray experiments using mixed tissue RNA reference samples.
Sample Metadata Fields
No sample metadata fields
View Samples- Drosophila melanogaster
- 6 Downloadable Samples
Illumina HiSeq 2500
Description
Methylation of mRNA at the N6 position of adenosin is known for a long time, but its function remains poorly understood. Here generated a null mutant in the catalytic subunit of the m6A mRNA methylosome, dIME4, in Drosophila to determine the impact of loss of m6A on gene expression using Illumina sequencing. Overall design: Since dIME4 is preferentially expressed in the nervous system and dIME4 null mutants are viable, we compared gene expression and alternative splicing in wild type (2 samples) and dIME4 mutants (3 samples) with genetic background matched w control females in neuron enriched head/thorax.
Publication Title
m<sup>6</sup>A potentiates Sxl alternative pre-mRNA splicing for robust Drosophila sex determination.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Drosophila melanogaster
- 5 Downloadable Samples
- Illumina HiSeq 2500
Description
Methylation of mRNA at the N6 position of adenosin is known for a long time, but its function remains poorly understood. Here generated a null mutant in the catalytic subunit of the m6A mRNA methylosome, dIME4, in Drosophila to determine the impact of loss of m6A on gene expression using Illumina sequencing. Overall design: Since dIME4 is preferentially expressed in the nervous system and dIME4 null mutants are viable, we compared gene expression and alternative splicing in wild type (2 samples) and dIME4 mutants (3 samples) with genetic background matched w control females in neuron enriched head/thorax.
Publication Title
m<sup>6</sup>A potentiates Sxl alternative pre-mRNA splicing for robust Drosophila sex determination.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Gallus gallus
- 6 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
The aim of this study was to assess the impact of oocyte competence on subsequent fertility. Based on knowledge already accessible in mammals and on bioinformatics tools including the chicken genome sequence, we focused on the expression of genes involved in the processes of fertilization and of early embryo development.
Publication Title
Search for the genes involved in oocyte maturation and early embryo development in the hen.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 5 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
SOX2 is an oncogene activated by recurrent 3q26.3 amplifications in human lung squamous cell carcinomas.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 16 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Hepatoblastoma (HB) is the most common pediatric liver tumor, and there are no targeted therapies available for children with HB. We have previously developed a murine model of HB which is driven by coactivation of the oncogenes YAP1 and -catenin (CTNNB1) [Tao J, Calvisi D, Ranganathan S, et al. Gastroenterology, 2014 Sep; 147(3): 690701]. We used the Sleeping Beauty transposase system combined with hydrodynamic tail vein injection to deliver plasmids containing mutant activated forms of YAP1 (YAP S127A) and -catenin (N90 -catenin) to a small number of pericentral hepatocytes. We have shown that these few transformed hepatocytes proliferate and dedifferentiate, eventually forming histologically heterogeneous tumors that resemble various subtypes of human HB (which is also highly heterogeneous), including areas of well-differentiated fetal, crowded fetal, embryonal, and blastemal HB. Our goal was to investigate how coactivation of YAP1 and -catenin drive the dedifferentiation of hepatocytes into hepatoblast-like tumor cells over time, leading to HB tumors. In order to measure changes in gene expression during tumorigenesis in our model, we used an Affymetrix microarray to analyze isolated RNA from wild type FVB mouse livers, mouse HB tumor tissue, and non-tumor liver tissue adjacent to HB tumors.
Publication Title
Hepatocyte-Derived Lipocalin 2 Is a Potential Serum Biomarker Reflecting Tumor Burden in Hepatoblastoma.
Sample Metadata Fields
Age, Specimen part
View Samples- Homo sapiens
- 2 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We have identified SOX2 as a new oncogene and a likely driver of recurrent 3q26.3 amplifications in lung Squamous Cell Carcinoma. SOX2 is a crucial transcription factor implicated in Embryonic and Neural Stem Cells, that we found widely activatd in human lung SCC. This part of the study aimed at analyzing the transcriptomic consequences of SOX2 overexpression in a simple in vitro model (human lung squamous immortalized cells).
Publication Title
SOX2 is an oncogene activated by recurrent 3q26.3 amplifications in human lung squamous cell carcinomas.
Sample Metadata Fields
Specimen part
View Samples- Caenorhabditis elegans
- 3 Downloadable Samples
- Affymetrix C. elegans Genome Array (celegans)
Description
Bio-electrospray, the direct jet-based cell handling apporach, is able to handle a wide range of cells. Studies at the genomic, genetic, and the physiological level have shown that, post-treatment, cellular integrity is unperturbed and a high percentage (>70%, compared to control) of cells remain viable. Although, these results are impressive, it may be argued that cell based systems are oversimplistic. This study utilizing a well characterised multicellular model organism, the non-parasitic nematode Caenorhabditis elegans. Nematodes were subjected to bio-electrosprays to demonstrate that bio-electrosprays can be safely applied to nematodes.
Publication Title
Bio-electrospraying the nematode Caenorhabditis elegans: studying whole-genome transcriptional responses and key life cycle parameters.
Sample Metadata Fields
Specimen part
View Samples