Filters
Technology
Platform
GSE36669
Mus musculus
15 Downloadable Samples
Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Obesity-associated insulin resistance is characterized by a state of chronic, low-grade inflammation that is associated with the accumulation of M1 proinflammatory macrophages in adipose tissue. Although different evidence explains the mechanisms linking the expansion of adipose tissue and adipose tissue macrophage (ATM) polarization, in the current study we investigated the concept of lipid-induced toxicity as the pathogenic link that could explain the trigger of this response. We addressed this question using isolated ATMs and adipocytes from genetic and diet-induced murine models of obesity. Through transcriptomic and lipidomic analysis, we created a model integrating transcript and lipid species networks simultaneously occurring in adipocytes and ATMs and their reversibility by thiazolidinedione treatment. We show that polarization of ATMs is associated with lipid accumulation and the consequent formation of foam celllike cells in adipose tissue. Our study reveals that early stages of adipose tissue expansion are characterized by M2-polarized ATMs and that progressive lipid accumulation within ATMs heralds the M1 polarization, a macrophage phenotype associated with severe obesity and insulin resistance. Furthermore, rosiglitazone treatment, which promotes redistribution of lipids toward adipocytes and extends the M2 ATM polarization state, prevents the lipid alterations associated with M1 ATM polarization. Our data indicate that the M1 ATM polarization in obesity might be a macrophage-specific manifestation of a more general lipotoxic pathogenic mechanism. This indicates that strategies to optimize fat deposition and repartitioning toward adipocytes might improve insulin sensitivity by preventing ATM lipotoxicity and M1 polarization.
Publication Title
Differential lipid partitioning between adipocytes and tissue macrophages modulates macrophage lipotoxicity and M2/M1 polarization in obese mice.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 6 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Graft-versus-host disease (GvHD) is still one of the major complications following allogeneic stem cell transplantation (SCT) triggered by alloreactive donor T cells. Whereas murine data have clearly shown the beneficial effects of regulatory T cells (Tregs) on the development of GvHD, data from the human system are rare mainly due to low cell numbers of circulating or organ-infiltrating Tregs in lymphopenic patients. Here, we present a comparative analysis of Tregs from patients with and without acute/ chronic GvHD designed as a dynamical approach studying the whole genome profile over the first 6 months after SCT. For this purpose, blood samples were collected monthly for FACS-based isolation of CD4+CD25highCD127low/- Tregs. The Treg transcriptome showed a high stability in the first half year representing the most sensitive time window for tolerance induction. However, the comparison of the Treg transcriptome from patients with and without GvHD uncovered regulated gene transcripts that point to a reduced suppressive function of Tregs with diminished migration capacity to the target organs likely contributing to the development of GvHD. These findings highlight the critical role of human Tregs in the pathophysiology of GvHD and identify novel targets for the manipulation of Tregs to optimize cellular immune intervention strategies.
Publication Title
Human regulatory T cells in allogeneic stem cell transplantation.
Sample Metadata Fields
Specimen part, Disease, Disease stage, Time
View Samples- Zea mays
- 6 Downloadable Samples
- Affymetrix Maize Genome Array (maize)
Description
The maize inbred line A661 shows a characteristic phenotype when grown at suboptimal temperatures for three weeks and then is exposed to optimal temperatures for one extra week. After this period the third leaf showed two well defined sections: distal (chlorophyll-less; CL) and proximal (chlorophyll-containing; CC) sections. To further investigate the performance of the inbred line A661 under cold conditions a gene expression profiling analysis was conducted using large scale maize microarrays. A total of 1002 transcripts change their expression between both leaf sections and the majority of these codify for proteins located to the chloroplast.
Publication Title
Genetic regulation of cold-induced albinism in the maize inbred line A661.
Sample Metadata Fields
No sample metadata fields
View Samples- Rattus norvegicus
- 8 Downloadable Samples
- Affymetrix Rat Expression 230A Array (rae230a)
Description
Oligodendrocytes are cells from the central nervous system that can be grouped into precursors, myelin-forming, and non-myelinating perineuronal. The function of perineuronal oligodendrocytes is unknown; it was suggested that they can ensheath denuded axons. We tested this hypothesis. Using cell-specific tags, microarray technology and bioinformatics tools to identify gene expression differences between these subpopulations allowed us to capture the genetic signature of perineuronal oligodendrocytes. Here we report that perineuronal oligodendrocytes are configured for a dual role. As perineuronal, they integrate a repertoire of transcripts designed to create a cell with its own physiological agenda. But they maintain a reservoir of untranslated transcripts encoding the major myelin proteins for we speculate a pathological eventuality. We posit that the signature molecules PDGFR-, cytokine PDGF-CC, and the transcription factor Pea3 used among others - to define the non-myelinating phenotype, may be critical for mounting a myelinating programme during demyelination. Harnessing this capability is of therapeutic value for diseases such as multiple sclerosis. This is the first molecular characterization of perineuronal oligodendrocytes.
Publication Title
The genetic signature of perineuronal oligodendrocytes reveals their unique phenotype.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 24 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Expression of the PPM1F Gene Is Regulated by Stress and Associated With Anxiety and Depression.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 16 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
Ppm1f regulation in the amygdala after acute stress immobilization
Publication Title
Expression of the PPM1F Gene Is Regulated by Stress and Associated With Anxiety and Depression.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 10 Downloadable Samples
- Affymetrix Mouse Gene 2.0 ST Array (mogene20st)
Description
ZBTB4 is a mammalian transcription factor with Zinc fingers and a BTB/POZ domain, which can bind methylated CpGs, as well as certain unmethylated consensus sequences. ZBTB4 is frequently downregulated in human cancers, but it is unclear whether this is a cause or consequence of transformation. To investigate the role of ZBTB4 in normal and pathological conditions, we generated Zbtb4-/- mice
Publication Title
Loss of the Methyl-CpG-Binding Protein ZBTB4 Alters Mitotic Checkpoint, Increases Aneuploidy, and Promotes Tumorigenesis.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 8 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
Ppm1f regulation in the medial prefrontal cortex (mPFC) after acute stress immobilization
Publication Title
Expression of the PPM1F Gene Is Regulated by Stress and Associated With Anxiety and Depression.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Prion infection in animals results in neurodegeneration and eventually death. To examine the cellular impact of Prion disease, we profiled non-proliferative fully differentiated C2C12 cells, which can replicate prions to high levels. Results suggest that accumulation of high levels of PrPSc in C2C12 myotubes does not cause any overt cellular dysfunction or molecular pathology.
Publication Title
Infectious prions accumulate to high levels in non proliferative C2C12 myotubes.
Sample Metadata Fields
Specimen part, Cell line, Treatment, Time
View Samples- Rattus norvegicus
- 6 Downloadable Samples
- Affymetrix Rat Gene 1.0 ST Array (ragene10st)
Description
The weaning period consist of a critical postnatal window for structural and physiologic maturation of rat beta cells. To investigate transcriptome changes involved in the maturation of beta cells neighboring this period we performed microarray analysis in FACS beta cell enriched populations to detail the global programme of gene expression to identify its changes during this process.
Publication Title
Transcriptome landmarks of the functional maturity of rat beta-cells, from lactation to adulthood.
Sample Metadata Fields
Sex
View Samples