GEO DataSets

(Submitter supplied) The newly identified claudin-low subtype of cancer is believed to represent the most primitive breast malignancies, having arisen from transformation of an early epithelial precursor with inherent stemness properties and metaplastic features. Challenging this hypothesis, we show both in vitro and in vivo that transcription factors inducing epithelial-mesenchymal transition can drive the development of claudin-low tumors from differentiated mammary epithelial cells, by playing a dual role in cell transformation and dedifferentiation.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

12 Samples

Download data: CEL, CHP

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens; Mus musculus

Type:

Expression profiling by array

Platforms:

GPL570 GPL1261

17 Samples

Download data: CEL, CHP

(Submitter supplied) The newly identified claudin-low subtype of cancer is believed to represent the most primitive breast malignancies, having arisen from transformation of an early epithelial precursor with inherent stemness properties and metaplastic features. Challenging this hypothesis, we show both in vitro and in vivo that transcription factors inducing epithelial-mesenchymal transition can drive the development of claudin-low tumors from differentiated mammary epithelial cells, by playing a dual role in cell transformation and dedifferentiation.

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

5 Samples

Download data: CEL, CHP

(Submitter supplied) MEF cells were sequentially infected with H-RasV12 and Twist (Twist1 or Twist2) expression retroviral constructs. Gene expression profiles of the resulting transformed cell lines were compared to the gene expression profile of primary MEF cells

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL2897

6 Samples

Download data

(Submitter supplied) Microarrays were used to determine relative global gene expression changes upon introduction of EMT-inducing or control vectors.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL3921

21 Samples

Download data: CEL

(Submitter supplied) Loss of the epithelial adhesion molecule E-cadherin is thought to enable metastasis by disrupting intercellular contacts - an early step in metastatic dissemination. To further investigate the molecular basis of this notion, we use two methods to inhibit E-cadherin function that distinguish between E-cadherin's cell-cell adhesion and intracellular signaling functions. While the disruption of cell-cell contacts alone does not enable metastasis, the loss of E-cadherin protein does, through induction of an epithelial-to-mesenchymal transition, invasiveness and anoikis-resistance. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL3921

12 Samples

Download data: CEL

(Submitter supplied) RNA of control mouse mammary epithelial cells (EpH4 control) and corresponding fra1 overexpressing cells (EpH4fra1 cl1 and EpH4fra1 cl2) was hybridized onto an 53MM chip and differentially expressed targets were further analysed. For each sample hybridization was performed in technical triplicate

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL18447

3 Samples

Download data: GPR

(Submitter supplied) Claudin-low breast cancer represents an aggressive molecular subtype that is comprised of mostly triple-negative mammary tumor cells that possess stem cell-like and mesenchymal features. Little is known about the cellular origin and oncogenic drivers that promote claudin-low breast cancer. In this study, we show that persistent oncogenic RAS signaling causes highly metastatic triple-negative mammary tumors in mice. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL24247

16 Samples

Download data: BW, CSV

(Submitter supplied) To identify miRNAs participating in SNAI1-orchestrated regulatory pathways, we analysed time-resolved microarray data of SNAI1-induced EMT, obtained during conditional expression of SNAI1 in a “Tet-Off” MCF7-SNAI1 breast carcinoma cell model (Vetter et al, 2009).

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by array

Platform:

GPL8366

21 Samples

Download data: TXT

(Submitter supplied) The SNAI1 and SNAI2 embryonic genes are reactivated in numerous cancer types, including carcinomas. They promote cancer cell dissemination by inducing an epithelial-to-mesenchymal transition (EMT) and by protecting cells from anoikis. We now have demonstrated that the sequentially related SNAI3 gene is aberrantly reactivated in human breast carcinomas. To compare the functional properties of the three SNAIL family members, the transcription factors were ectopically expressed in immortalized mammary epithelial cells.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

20 Samples

Download data: TXT

(Submitter supplied) We have demonstrated that the oncogenic activation of B-RAF (using a truncated delta-BRAF-ER version inducible with tamoxifen) in the melan-a melanocyte cell line triggers the activation of Zeb1 and Twist1 at the expanse of Zeb2 and Snail2. Enforced maintenance of Zeb2 or Snail2 expression reduces the B-RAF oncogenic potential while ectopic expression of Zeb1 or Twist1 cooperates with B-RAF in melan-a cell transformation. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

6 Samples

Download data: CEL, CHP

(Submitter supplied) Introduction: Tumor initiating cells (TICs) are being extensively studied for their role in tumor etiology, maintenance and resistance to treatment. The isolation of TICs has been limited by the scarcity of this population in the tissue of origin and because the molecular signatures that characterize these cells are not well understood. Herein, we describe the generation of TIC-like cell lines by ectopic expression of the OCT4 transcription factor (TF) in primary breast cell preparations. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL7504

13 Samples

Download data

(Submitter supplied) Malignant progression in cancer has been associated with the emergence of populations of tumor-initiating cells (TIC) endowed with capabilities for unlimited self-renewal, survival under stress and establishment of distant metastases. Additionally, the acquisition of invasive properties driven by the genetic program known as epithelialmesenchymal transition (EMT) may be an essential step in the evolution of neoplastic cells into fully metastatic populations. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

6 Samples

Download data: CEL

(Submitter supplied) WAP-Cre:Ptenf/f:p53lox.stop.lox_R270H composite mice were generated by genetic crossing. In these mice, Pten is deleted and a R270H p53 mutation in the DNA binding domain is induced upon expression of Cre recombinase in pregnancy-identified alveolar progenitors. Tumors were characterized by histology, marker analysis, various bioinformatics methods, high-throughput (HTP) FDA-drug screen as well as orthotopic injection to quantify tumor initiating cells (TICs) and tail-vein injection to identify lung-metastasis. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6246

31 Samples

Download data: CEL

(Submitter supplied) Elf5 (or ESE-2) is an ETS transcription factor that is abundantly expressed in the mammary epithelium, where it plays a critical role in dictating cell fate and lineage choices. These changes are in part mediated by alterations in the expression and activity of critical components of the Jak/Stat pathway. While the biological function of Elf5 in mammary gland development has been well characterized, its role in breast cancer remains to be elucidated. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4133

10 Samples

Download data: TXT

(Submitter supplied) Elf5 induced transcriptional changes in MDA-MB-231 origin, control (mut Elf5) vs WT ELF5

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4133

6 Samples

Download data: TXT

(Submitter supplied) Elf5 induced transcriptional changes in high lung metastasis subline LM2 (MDA-MB-231 origin), control (GFP) vs ELF5

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4133

4 Samples

Download data: TXT

(Submitter supplied) We developed conditional knockout mice where the transcription factor Elf5 (also called ESE-2) is deleted in the mammary glands. Loss of Elf5 results in block in alveologenesis and epithelial differentiation defects. Mammary gland samples from Elf5 knockout and wild type animals were analyzed for global transcriptome changes.

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

6 Samples

Download data: CEL

(Submitter supplied) Using a TWIST1-inducible epithelial-to-mesenchymal transition (EMT) model in HMLE cells, miRNA changes were profiled at different time points during an active EMT.

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by array

Platform:

GPL18795

12 Samples

Download data: TXT

(Submitter supplied) Epithelial-to-mesenchymal transition (EMT) is a dynamic process that relies on cellular plasticity; an EMT/MET axis is critical for metastatic colonization of carcinomas. Unlike epithelial programming, regulation of mesenchymal programming is not well understood in EMT. Here we describe the first microRNA that enhances exclusively mesenchymal programming. We demonstrate that microRNA-424 is up-regulated early during a TWIST1/SNAI1-induced EMT, and that it causes cells to express mesenchymal genes without affecting epithelial genes, resulting in a mixed/intermediate EMT. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL11154

6 Samples

Download data: TXT