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GSE9447
Mus musculus
4 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Sialic acids on vertebrate cell surfaces mediate many biological roles. Altered expression of certain sialic acid types or their linkages can have prognostic significance in human cancer. A classic but unexplained example is enhanced 2-6-sialylation on N-glycans, resulting from over-expression of the Golgi enzyme -galactoside:2-6-sialyltransferase (ST6Gal-I). Previous data supporting a role for the resulting Sia2-3Gal1-4GlcNAc (Sia6LacNAc) structure in tumor biology were based on in vitro studies in transfected carcinoma cells, in which increased Sia6LacNAc on 1-integrins enhanced their binding to ligands, and stimulated cell motility. Here we examine for the first time the in vivo role of the ST6Gal-I enzyme in the growth and differentiation of spontaneous mammary cancers in mice transgenic for an MMTV-promoter-driven polyoma-middle-T antigen, a tumor in which beta1-integrin function is important for tumorigenesis, and in maintaining the proliferative state of tumor cells. Tumors induced in St6gal1 null animals were more differentiated in comparison to those in the wild-type background, both by histological analysis and by protein expression profiles. Furthermore, we show the St6gal1 null tumors have selectively altered expression of genes associated with focal adhesion signaling, and have decreased phosphorylation of FAK, a downstream target of 1-integrins. This first in vivo evidence for a role of ST6Gal-I in tumor progression was confirmed using a novel approach, which conditionally restored St6gal1 in cell lines derived from the null tumors. These findings indicate a role for ST6Gal-I as a mediator of tumor progression, with its expression causing a less differentiated phenotype, via enhanced 1-integrin function.
Publication Title
alpha 2-6-Linked sialic acids on N-glycans modulate carcinoma differentiation in vivo.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
Illumina HiSeq 2000
Description
Reprogramming resident glia into functional and subtype-specific neurons in vivo by delivering reprogramming genes directly to the brain provides a step forward towards the possibility of treating brain injuries or diseases. Here, we show that neurons reprogrammed using Ascl1, Lmx1a and Nurr1 functionally mature and integrate into existing brain circuitry, and that the majority of the reprogrammed neurons have properties of fast spiking, parvalbumin-containing interneurons. Overall design: A total of 6 samples were analyzed. Each sample is consists of approximately 33 laser-captured reprogrammed-neurons identified by nuclear GFP and expressing the transcription factors Ascl1, Lmx1a and Nurr1 (ALN).
Publication Title
Direct Reprogramming of Resident NG2 Glia into Neurons with Properties of Fast-Spiking Parvalbumin-Containing Interneurons.
Sample Metadata Fields
Sex, Specimen part, Subject
View Samples- Mus musculus
- 617 Downloadable Samples
- Illumina HiSeq 2000
Description
We sequenced the mRNAs of embryonic stem cells (ESCs) cultured in different conditions. The two lines M (male) and F (female) used in this study were derived from E4 blastocysts of the same cross between a C57BL/6J (Mus musculus domesticus) and CAST/EiJ (Mus castaneus) male. mESCs were cultured in 2i and LIF as the ground state condition or in serum and LIF as the conventional condition. Epistem cell lines were also generated from the two lines by culturing them with Activin A and FGF2. In order to study more advanced development, we differentiated the two mESC lines through embryonic body formation to postmitotic motor neurons using retinoic acid and the smoothened agonist SAG. This differentiation process also results in the derivation of several types of interneurons. We picked single cells from all different conditions and generated sequencing libraries using the Smart-seq2 and Tn5 protocol. For simplicity, we designate the different condition as ES2i, ES, Epi and Neuron from hereon. We also obtained preimplantation inner cell mass and epiblast cells from E3.5 ICM (inner cell mass) and E4.5 blastocysts of the crossbred mice (male CAST/EiJ × female C57BL/6J) as well as postimplantation epiblast cells from E5.5 embryos of C57BL/6J mice Overall design: Examination of gene expression profile in individual male and female embryonic stem cell lines along developmental progression
Publication Title
Single-cell analyses of X Chromosome inactivation dynamics and pluripotency during differentiation.
Sample Metadata Fields
Sex, Specimen part, Cell line, Subject
View Samples- Mus musculus
- 27 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The generation of specific types of neurons from stem cells offers important opportunities in regenerative medicine. However, future applications and proper verification of cell identities will require stringent ways to generate homogenous neuronal cultures. Here we show that under permissive culturing conditions individual transcription factors can induce a desired neuronal lineage from virtually all expressing cells by a mechanism resembling developmental binary cell fate switching. Such efficient selection of cell fate resulted in remarkable cellular enrichment that enabled global gene expression validation of generated neurons and identification of novel features in the studied cell lineages. Several sources of stem cells have a limited competence to differentiate into e.g. dopamine neurons. However, we show that the combination of factors that normally promote either regional or dedicated neuronal specification can overcome limitations in cellular competence and promote efficient reprogramming also in more remote neural contexts, including human neural progenitor cells.
Publication Title
Transcription factor-induced lineage selection of stem-cell-derived neural progenitor cells.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Mus musculus
- 8 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Histidine-rich glycoprotein (HRG) is a 75 kDa heparin-binding plasma protein which has been implicated in regulation of tumor angiogenesis and growth. To exert some of its biological functions, HRG acts on macrophages.This study was performed to assess changes in gene expression in peritoneal macrophages treated with HRG using oligonucleotide microarrays
Publication Title
Genetic deficiency in plasma protein HRG enhances tumor growth and metastasis by exacerbating immune escape and vessel abnormalization.
Sample Metadata Fields
Specimen part, Disease, Treatment, Time
View Samples- Homo sapiens
- 12 Downloadable Samples
- Illumina HiSeq 2000
Description
Early chemotherapy for advanced/metastatic non-castration resistant prostate cancer (PCa) may improve overall patient survival. We studied the safety, tolerability and early efficacy of up-front docetaxel chemotherapy and androgen deprivation therapy (ADT) versus ADT alone for patients with newly-diagnosed advanced/metastatic PCa. As proof of concept, we undertook in vivo gene expression profiling by next generation RNA sequencing (RNA-Seq). Overall design: Tumour biposies from 6 patients were taken before and after treatment with combined ADT and docetaxcel for 6 weeks
Publication Title
Identification of a candidate prognostic gene signature by transcriptome analysis of matched pre- and post-treatment prostatic biopsies from patients with advanced prostate cancer.
Sample Metadata Fields
Specimen part, Subject, Time
View Samples- Homo sapiens
- 36 Downloadable Samples
- NextSeq 500
Description
Autophagy is a membrane-trafficking process that directs degradation of cytoplasmic material in lysosomes. The process promotes cellular fidelity, and while the core machinery of autophagy is known, the mechanisms that promote and sustain autophagy are less well defined. Here we report that the epigenetic reader BRD4 and the methyltransferase G9a repress a TFEB/TFE3/MITF-independent transcriptional program that promotes autophagy and lysosome biogenesis. We show that BRD4 knockdown induces autophagy in vitro and in vivo in response to some, but not all, situations. In the case of starvation, a signaling cascade involving AMPK and histone deacetylase SIRT1 displaces chromatin-bound BRD4, instigating autophagy gene activation and cell survival. Importantly, this program is directed independently and also reciprocally to the growth-promoting properties of BRD4 and is potently repressed by BRD4-NUT, a driver of NUT midline carcinoma. These findings therefore identify a distinct and selective mechanism of autophagy regulation. Overall design: RNA-Seq of KP-4 pancreatic adenocarcinoma cells transfected with control, BRD4 #1 or BRD4 #2 siRNA for 72hrs (n=3 independent sample preparations)
Publication Title
Bromodomain Protein BRD4 Is a Transcriptional Repressor of Autophagy and Lysosomal Function.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Recent studies have suggested increased plasticity of differentiated cells within the intestine to act both as intestinal stem cells and tumour initiating cells. However, little is known of the processes that regulate this plasticity. Our previous work has shown that activating mutations of Kras or the NF-kB pathway can drive dedifferentiation of intestinal cells lacking Apc.
Publication Title
TGFβ pathway limits dedifferentiation following WNT and MAPK pathway activation to suppress intestinal tumourigenesis.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Recent studies have suggested increased plasticity of differentiated cells within the intestine to act both as intestinal stem cells and tumour initiating cells. However, little is known of the processes that regulate this plasticity. Our previous work has shown that activating mutations of Kras or the NF-kB pathway can drive dedifferentiation of intestinal cells lacking Apc.
Publication Title
TGFβ pathway limits dedifferentiation following WNT and MAPK pathway activation to suppress intestinal tumourigenesis.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 16 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Cerebral palsy is caused be an upper motor neuron lesion which casues spasticity as well as secondary effects on muscle . Muscle from cerebral palsy patients is has been shown to be smaller, with more ECM and longer sarcomere lengths
Publication Title
Novel transcriptional profile in wrist muscles from cerebral palsy patients.
Sample Metadata Fields
Sex, Age
View Samples