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Tumorigenic-enriched (TE) and lung-metastatic (LM) derivatives and parental populations from the breast cancer MDA-MB-231 and CN34 cell lines

ABSTRACT: The LM2 derivative cell line is described in Minn et al. Nature 2005. The LM1a derivative cell line is described in Tavazoie et al. Nature 2008. Tumorigenic-enriched (TE) and lung-metastatic (LM) derivatives and their respective parental populations, from the breast cancer MDA-MB-231 and CN34 cell lines were transcriptomically compared in order to identify candidate regulators of breast cancer tumor re-initiation.

ORGANISM(S): Homo sapiens

SUBMITTER: Jason Ross

PROVIDER: E-GEOD-52629 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Tumorigenic-enriched (TE) and lung-metastatic (LM) derivatives and parental populations from the breast cancer MDA-MB-231 and CN34 cell lines

Project description:The LM2 derivative cell line is described in Minn et al. Nature 2005. The LM1a derivative cell line is described in Tavazoie et al. Nature 2008.

2015-04-02 | GSE52629 | GEO

Parental MeWo and highly metastatic LM2 human melanoma cell line derivatives with or without miR-199a or miR-1908

Project description:Human melanoma MeWo cells and their respective LM2 metastatic derivatives, generated through in vivo selection, were transcriptomically profiled in the context of miR-199a and miR-1908 gain- and loss-of-function in order to identify putative target genes for these miRNAs, MeWo cells and their respective LM2 metastatic derivatives in the context of miR-199a and miR-1908 gain- and loss-of-function

2013-02-10 | E-GEOD-35668 | biostudies-arrayexpress

Gene expression profilling of poorly metastatic MDA cells and highly metastatic LM2 cells.

Project description:Comparison of gene expression between the breast cancer cell line MDA-MB-231 and its highly metastatic deriviate LM2 cells (described in Minn et al., Nature 2005). Results hilghlights potential metastasis promoting and suppressing genes. 4 Samples

2011-12-16 | E-GEOD-23904 | biostudies-arrayexpress

miR-126 over-expression in highly metastatic LM2 breast cancer cells.

Project description:miR-126 were over-expressed using the miR-Vec system in highly metastatic LM2 cells. The LM2 cell line are described in detail in Minn et al. Nature 2005 This approach was used to conduct an unbiased search for specific miR-126 target genes in breast cancer cells. 4 Samples

2011-12-16 | E-GEOD-23905 | biostudies-arrayexpress

Gene expression profilling of poorly metastatic MDA cells and highly metastatic LM2 cells.

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LM resistance

Project description:The combination therapy of the Artemisinin-derivative Artemether (ART) with Lumefantrine (LM) (Coartem®) is an important malaria treatment regimen in many endemic countries. Resistance to Artemisinin has already been reported, and it is feared that LM resistance (LMR) could also evolve quickly. Therefore molecular markers which can be used to track Coartem®efficacy are urgently needed. Often, stable resistance arises from initial, unstable phenotypes that can be identified in vitro. Here we have used the Plasmodium falciparum multidrug resistant reference strain V1S to induce LMR in vitro by culturing the parasite under continuous drug pressure for 16 months. The initial IC50 (inhibitory concentration that kills 50% of the parasite population) was 24 nM. The resulting resistant strain V1SLM, obtained after culture for an estimated 166 cycles under LM pressure, grew steadily in 378 nM of LM; this corresponds to 15 times the IC50 of the parental strain. However, after two weeks of culturing V1SLM in drug-free medium, the IC50 returned to that of the initial, parental strain V1S. This transient drug tolerance was associated with major changes in gene expression profiles: when we explored V1SLM using the PFSANGER Affymetrix custom array, we identified 184 differentially expressed (DE) genes; amongst those 18 putative transporters including the multidrug resistance gene (pfmdr1), the multidrug resistance associated protein (pfmrp1) and the V-type H+ pumping pyrophosphatase 2 (pfvp2). Moreover, our results showed significant enrichment of genes associated with fatty acid metabolism and a clear selective advantage for two genomic loci in parasites grown under LM drug pressure, suggesting these genes may contribute to LM response in P. falciparum and could prove useful as molecular markers to monitor LM susceptibility.

2011-04-01 | E-TABM-1101 | biostudies-arrayexpress

Broad-Spectrum Therapeutic Suppression of Metastatic Melanoma Through Nuclear Hormone Receptor Activation

Project description:Melanoma metastasis is a devastating outcome in need of novel preventive therapies. We provide pharmacologic, nolecuar, and genetic evidence establishing the liver-X nuclear hormone receptor (LXR) as a therapeutic target in melanoma. Molecular and genetic experiments revealed these effects to be mediated by LXRb, which elicits these outcomes through transcriptional induction of tumoral and systemic apolipoprotein-E (ApoE). LXRb agonism robustly suppressed tumor growth and metastasis across a wide spectrum of melanoma lines of diverse mutational subtypes established in xenograft, immunocompetent, and genetically-initiated model. We propose a path for the clinical testing of LXRb targeting-a therapeutic approach that uniquely acts by transcriptionally acivating a metastasis suppressor gene. In this experiment we analyzed the effect of GW3965 treatment on gene expression in the MeWo human melanoma cell line. The cells were treated either with DMSO or GW3965 at 1 micromolar for 48 hours, after which the RNA was extracted and gene expression was analyzed by transcriptomic profiling

2014-06-01 | E-GEOD-48782 | biostudies-arrayexpress

Regulatory consequences of SOX4 knock-down in MDA-LM2 cell line

Project description:Transcriptomic profiling of SOX4 knock-down MDA-LM2 cell line resulted in down-regulation of its transcriptional target gene, TMEM2. Two independent siRNAs were used to knock down SOX4 in metastatic MDA-LM2 cells. The cells were then subjected to transcripome profiling in comparison to control siRNA-transfected cells.

2016-03-15 | E-GEOD-79202 | biostudies-arrayexpress

Aberrant silencing of imprinted genes on chromosome 12qF1 in mouse induced pluripotent stem cells

Project description:This SuperSeries is composed of the following subset Series: GSE20572: mRNA profiling of genetically matched ESCs and iPSCs GSE20575: mRNA profiling of iPSCs and derivative NT-ESCs Refer to individual Series

2010-04-27 | E-GEOD-20576 | biostudies-arrayexpress

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