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SRP083014
Homo sapiens
12 Downloadable Samples
Illumina HiSeq 2500
Description
Tetraploidization, or genome doubling, is a prominent event in tumorigenesis, primarily because cell division in polyploid cells is error-prone and produces aneuploid cells. This study investigates changes in gene expression evoked in acute and adapted tetraploid cells and their impact on cell-cycle progression. Acute polyploidy was generated by knockdown of essential regulator of cytokinesis Anillin, which resulted in cytokinesis failure and formation of binucleate cells, or by chemical inhibition of Aurora kinases, causing abnormal mitotic exit with formation of single cells with aberrant nuclear morphology. Transcriptome analysis of these acute tetraploid cells revealed common signatures of activation of the tumor-suppressor protein p53. Suppression of proliferation in these cells was dependent on p53 and its transcriptional target - Cdk inhibitor p21. Rare proliferating tetraploid cells can emerge from acute polyploid populations. Gene expression analysis of single-cell derived, adapted tetraploid clones showed upregulation of several p53 target genes and cyclin D2, the activator of Cdk4/6/2. Overexpression of cyclin D2 in diploid cells strongly potentiated the ability to proliferate with increased DNA content despite the presence of functional p53. These results point out that p53-mediated suppression of proliferation of polyploid cells can be averted by increased levels of oncogenes such as Cyclin D2, elucidating a possible route for tetraploidy-mediated genomic instability in carcinogenesis. Overall design: Three biological replicates of cells treated with siRNA against Anillin or a non-targeting control are FACS sorted into 2N or 4N populations and assessed for gene expression differences via RNA Seq for a total of 12 samples.
Publication Title
Transcriptome analysis of tetraploid cells identifies cyclin D2 as a facilitator of adaptation to genome doubling in the presence of p53.
Sample Metadata Fields
Cell line, Subject
View Samples- Homo sapiens
- 5 Downloadable Samples
Affymetrix Human Genome U133A Array (hgu133a)
Description
The Fra-1 transcription factor promotes tumor cell growth, invasion and metastasis. While characterizing five breast cancer cell lines derived from primary human breast tumors, we identified BRC-31 as a novel basal-like cell model that expresses elevated Fra-1 levels. BRC-31 cells display elevated FAK, SRC and ERK2 phosphorylation relative to luminal breast cancer models. Inhibition of this signaling axis, through the use of pharmacological inhibitors, reduces the phosphorylation and stabilization of Fra-1. Elevated integrin V3 expression in these cells suggested that integrin receptors might activate this FAK-SRC-ERK2 signaling axis to enhance Fra-1 phosphorylation. These cells also express high levels of uPAR, a GPI-anchored receptor that has been shown to enhance integrin-mediated signaling initiated by Vitronectin engagement. Transient knockdown of uPAR in BRC31 cells grown on Vitronectin reduces Fra-1 phosphorylation and stabilization and uPAR and Fra-1 are required for Vitronectin-induced cell invasion. In clinical samples, a molecular component signature consisting of Vitronectin-uPAR-uPA-Fra-1 predicts poor overall survival in patients with breast cancer and correlates with a Fra-1 transcriptional signature. Taken together, we have identified a novel-signaling axis that leads to phosphorylation and stabilization of Fra-1, a transcription factor that is emerging as an important modulator of breast cancer progression and metastasis.
Publication Title
Integrin-uPAR signaling leads to FRA-1 phosphorylation and enhanced breast cancer invasion.
Sample Metadata Fields
Age, Disease, Disease stage
View Samples- Mus musculus
- 7 Downloadable Samples
- Affymetrix Mouse Gene 2.0 ST Array (mogene20st)
Description
Intranasal (IN) immunization induces different genotype expression in CD8 memory T cells compared to the CD8 memory T cells induced by intramuscular (IM) immunization. We used microarrays to detail the global program of gene expression underlying the differential induction after IN or IM immunization.
Publication Title
Induction of resident memory T cells enhances the efficacy of cancer vaccine.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Homo sapiens
- 123 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
One of the main problems in managing desmoids tumors is their locoregional aggressiveness and their high ability to recur after initial treatment. In our work, with the goal to identify molecular markers that can predict Progression-Free Survival, gene-expression screening was conducted on 128 available independent untreated primary desmoid tumors using cDNA microarray. By analyzing expression profiles, we have identified, for the first time, a gene expression signature that is able to predict Progression-Free Survival. This molecular signature identified two groups with clearly distinct Progression-Free Survival in the two sets of subjects. Patients in good prognostic group had achieved a progression-free 2-year survival rate of 86% while patients in poor prognostic group had a progression-free 2-year survival rate of 44%.
Publication Title
Gene Expression Profiling of Desmoid Tumors by cDNA Microarrays and Correlation with Progression-Free Survival.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Homo sapiens
- 12 Downloadable Samples
- Illumina HumanHT-12 V4.0 expression beadchip
Description
Compares shFOXO4 vs. Control in LNCaP grown in culture, or in nude mice as primary orthotopic tumors or lymph node metastases
Publication Title
A genome-wide RNAi screen identifies FOXO4 as a metastasis-suppressor through counteracting PI3K/AKT signal pathway in prostate cancer.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 7 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Baseline gene expression of adipose stem cell derived iPSCs generated by lentiviral Yamanaka 4 factors. We used microarrays to analyze the global gene expression of hACS derived iPSCs with KMOS and KMOS+miR-302.
Publication Title
MicroRNA-302 increases reprogramming efficiency via repression of NR2F2.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus, Homo sapiens
- 80 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Rhabdoid Tumors (RT) are highly aggressive tumors that are frequently localized in the central nervous system (CNS) where they are termed atypical teratoid and rhabdoid tumors (ATRT). We generated conditional Smarcb1-deficient mouse model leads to CNS Smarcb1-deficient tumors.
Publication Title
The occurrence of intracranial rhabdoid tumours in mice depends on temporal control of Smarcb1 inactivation.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 67 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We used microarrays to compare gene expression profilings in various SMARCB1-deficient tumors.
Publication Title
Embryonic signature distinguishes pediatric and adult rhabdoid tumors from other SMARCB1-deficient cancers.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 8 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
To elucidate the gene expression footprint of antigenically challenged T-cells which had been treated with anti-LFA-1, CTLA4Ig, anti-CD40-ligand antibodies, we performed microarray gene expression analysis comparing the expression profile of costimulatory blockade treated and untreated responder T-cells.
Publication Title
Short-term immunosuppression promotes engraftment of embryonic and induced pluripotent stem cells.
Sample Metadata Fields
Specimen part
View Samples- Gossypium hirsutum
- 89 Downloadable Samples
- Affymetrix Cotton Genome Array (cotton)
Description
Cotton fiber were used for the expression analysis at different developmental stages
Publication Title
Transcriptome dynamics during fibre development in contrasting genotypes of Gossypium hirsutum L.
Sample Metadata Fields
No sample metadata fields
View Samples