Filters
Technology
Platform
GSE41649
Homo sapiens
8 Downloadable Samples
Affymetrix Human Genome U133A Array (hgu133a)
Description
Allergic asthma is a complex trait. Several approaches have been used to identify biomarkers involved in this disease. This study aimed at demonstrating the relevance and validity of microarrays in the definition of allergic asthma expression pattern. The authors compared the transcript expressions of bronchial biopsy of 2 different microarray experiments done 2 years apart, both including nonallergic healthy and allergic asthmatic subjects (n = 4 in each experiment). U95Av2 and U133A GeneChips detected respectively 89 and 40 differentially expressed genes. Fifty-five percent of the U133A genes were previously identified with the U95Av2 arrays. The immune signaling molecules and the proteolytic enzymes were the most preserved categories between the 2 experiments, because 3/4 of the genes identified by the U133A were also significant in the U95Av2 study for both categories. These results demonstrate the relevance of microarray experiments using bronchial tissues in allergic asthma. The comparison of these GeneChip studies suggests that earlier microarray results are as relevant as actual ones to target new genes of interest, particularly in function categories linked to the studied disease. Moreover, it demonstrates that microarrays are a valuable technology to target novel allergic asthma pathways as well as biomarkers.
Publication Title
A comparison of two sets of microarray experiments to define allergic asthma expression pattern.
Sample Metadata Fields
Specimen part, Disease
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Genome U95 Version 2 Array (hgu95av2)
Description
Asthma pathogenesis and susceptibility involves a complex interplay between genetic and environmental factors.
Publication Title
Functional classes of bronchial mucosa genes that are differentially expressed in asthma.
Sample Metadata Fields
Sex, Specimen part
View Samples- Homo sapiens
- 9 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
The implication of alveolar macrophages (AM) in asthma, a Th2 disease, has not been well characterized. Thus, the goal of this study is to better characterize AM phenotype of allergic asthmatic compared with normal subjects using genomic expression analyses. Microarray analyses were performed with AM isolated from bronchoalveolar lavage. Robust multiarray analysis (RMA) normalization and Smyths moderated t test were used to select differentially expressed genes. Fifty differentially expressed genes were identified. Nineteen have been classified in categories linked to stress or immune responses and among them; nine are part of the heat shock protein (HSP) family. Difference of expression for three (HSPD1, PRNP, SERPINH1) of the five selected genes were validated using real-time reverse transcriptionpolymerase chain reaction. Enzyme linked immunosorbent assay was used to measure the protein level of heat shock protein 60 (HSP60), the protein encoded by HSPD1, and showed difference in AM protein level between allergic asthmatic and control subjects. In summary, this study suggests that HSP gene family, particularly HSP60, is involved in AM functions in a context of allergic asthma. These results also support the involvement of AM immune functions in the development of an allergic asthmatic response.
Publication Title
Alveolar macrophages in allergic asthma: an expression signature characterized by heat shock protein pathways.
Sample Metadata Fields
Specimen part, Disease, Disease stage
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Tha altered biological pathways in Epidermolysis bulloda simplex, a rare monogenetic skin disease, have not been well characterized. Thus, the goal of this study is to characterize the expression profile of EBS patients compared with normal subjects using genomic expression analyses. Microarray analyses were performed with RNA isolated from skin biopsies. Robust multiarray analysis (RMA) normalization and Smyths moderated t test were used to select differentially expressed genes. Expression profiling comparisons show that 28 genes are differentially expressed in EBS patients compared to control subjects and 41 genes in EBS-DM compared to their matched controls. Nine genes involved in fatty acid metabolism and 2 genes in epidermal keratinisation are common altered expressed genes between the two subgroups. These two biological pathways contribute both to the formation of the cell envelope barrier and seem to be defective in the severe EBS phenotype. This study demonstrates, for the first time, the relevance of metabolic cluster, specifically fatty acid metabolism in EBS biology. Difference of expression for three (AWAT2, ELOVL , and SPRR4 ) of the five selected genes were validated using real-time reverse transcriptionpolymerase chain reaction. To our knowledge, the distinctive pattern of gene expression that characterizes EBS versus healthy skin tissue has never been reported.
Publication Title
Expression signature of epidermolysis bullosa simplex.
Sample Metadata Fields
Specimen part, Disease, Disease stage
View Samples- Mus musculus
- 17 Downloadable Samples
NextSeq 500
Description
Purpose: Controlling the balance between immunity and immunopathology is crucial for host resistance to pathogens. Upon infection, activation of the hypothalamic-pituitary-adrenal (HPA) axis leads to the production of glucocorticoids (GCs). However, the pleiotropic effects of these steroid hormones make it difficult to decipher their precise role in vivo. Our purpose was to study how GCs regulate the function of group 1 ILCs in spleen and liver upon Murine Cytomegalovirus (MCMV) infection. Methods: We studied the in vivo effect of endogenous GCs released upon MCMV infection on NK cells in spleen and liver and ILC1s in the liver. We compared WT mice with GRNcr1-iCre mice, in which the gene encoding for GC receptor (GR) is selectively deleted in Ncr1+ cells. Results: We found that the regulation of NK function by the GR is required for host protection against MCMV. Mechanistically, endogenous GCs produced shortly after infection induce the selective and tissue-specific expression of the immune checkpoint PD1 on NK cells. This GC-PD1 pathway mediates its immunoregulatory functions by limiting interferon (IFN)-g production by splenic NK cells, preventing lethal immunopathology. Importantly, this regulation does not compromise viral clearance. Conclusions:The fine-tuning of a selective subset of ILCs by the HPA axis preserves tissue integrity without impairing pathogen elimination, revealing a novel aspect of neuro-immune regulation. Overall design: Splenocytes (after NK cell enrichment with the mouse NK Cell Isolation Kit II, Miltenyi Biotec) and liver lymphocytes were pooled from three mice for each genotype. A FACS Aria III (BD Biosciences) was used to sort approximately 5 x 10^5 NK cells from the spleen and liver and 5 x 10^4 liver-resident ILC1s 44h post MCMV infection. We compared gene expression between glucocorticoid receptor (GR)-sufficient and deficient ILCs to identify the genes whose expression is regulated by GCs. Three biological replicates were generated for all samples except for the GRNcr1-iCre liver ILC1s sample (two biological replicates).
Publication Title
Endogenous glucocorticoids control host resistance to viral infection through the tissue-specific regulation of PD-1 expression on NK cells.
Sample Metadata Fields
Sex, Specimen part, Subject
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Vanin1, a regulator of vitamin B5 metabolism, is expressed by sarcoma tumors. We evaluated its impact on sarcoma growth by using sarcoma cell lines derived from p16p19Vnn1-deficient mice and further transduced with an oncogenic RasV12 oncogene (R tumors) in the presence or not of a catalytically active (VR tumors) or mutated (VdR tumors) Vnn1 isoform.
Publication Title
Vnn1 pantetheinase limits the Warburg effect and sarcoma growth by rescuing mitochondrial activity.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
We found that the non-essential amino acid L-Proline (L-Pro) acts as a signaling molecule that promotes the conversion of embryonic stem cells (ESCs) into mesenchymal-like, spindle-shaped, highly motile, invasive pluripotent stem cells. This embryonic stem cell-to-mesenchymal-like transition (esMT) is accompanied by a genome-wide remodeling of the transcriptome
Publication Title
L-Proline induces a mesenchymal-like invasive program in embryonic stem cells by remodeling H3K9 and H3K36 methylation.
Sample Metadata Fields
Cell line
View Samples- Rattus norvegicus
- 20 Downloadable Samples
- Affymetrix Rat Genome 230 2.0 Array (rat2302)
Description
Physical exercise training is a known protective factor against cardiovascular morbidity and mortality. Nevertheless, the underlying specific molecular mechanisms still remain uncompletely explored. To identify molecular mechanisms by which exercise training induces this favorable phenotype a genomic approach was used in an animal model of mild exercise previously demonstrated by our group to induce cardioprotection.
Publication Title
Gene expression profile of rat left ventricles reveals persisting changes following chronic mild exercise protocol: implications for cardioprotection.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 16 Downloadable Samples
- Illumina HiSeq 2000
Description
Maintenance of vascular integrity in the adult animal is needed for survival and critically dependent on the endothelial lining, which controls barrier function, blood fluidity, and flow dynamics. However, nodal regulators that coordinate endothelial identity and function in the adult animal remain poorly characterized. Here we show that endothelial KLF2 and KLF4 control a large segment of the endothelial transcriptome thereby affecting virtually all key endothelial functions. Inducible endothelial-specific deletion of Klf2 and/or Klf4 reveals that a single allele of either gene is sufficient for survival, but absence of both (EC-DKO) results in acute death from myocardial infarction, heart failure, and stroke. EC-DKO animals exhibit profound compromise in vascular integrity and profound dysregulation of the coagulation system. Collectively, these studies establish an absolute requirement for KLF2/4 for maintenance of endothelial and vascular integrity in the adult animal. Overall design: Eight-to-ten-week old mice were intraperitoneally injected with tamoxifen to trigger endothelial-specific gene deletion of KLF2 and/or KLF4. At day 6 post-injection, endothelial cells were isolated from the heart and total RNA was purified.
Publication Title
KLF2 and KLF4 control endothelial identity and vascular integrity.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 12 Downloadable Samples
- Illumina HiSeq 2000
Description
Serotonin in the mammary gland is known to regulate processes such as calcium homeostasis, tight junction permeability, and milk protein gene expression. The objective of this study was to discover novel genes, pathways and functions which serotonin modulates during lactation. The rate-limiting enzyme in the synthesis of non-neuronal serotonin is tryptophan-hydroxylase (TPH1). Therefore, we used TPH1 knock-out mice dams (serotonin deficient) and compared them to wild-type dams and also Tph1 deficient dams injected daily with 5-HTP. Mammary gland tissues were collected on day 10 of lactation and then analyzed by RNA sequencing. Overall design: Genome-wide gene expression profiles of 12 mouse mammary gland samples were evaluated using RNA sequencing; these 12 samples belong to wild-type dams (WT; n = 4), Tryptophan hydroxylase (Tph1) knock-out dams (KO; Tph1 deficient; n = 4), and Tph1 deficient dams injected daily with 5-HTP (RC; n = 4). Mammary tissues were collected on day 10 of lactation and then underwent RNA extraction, library generation, and subsequent sequencing.
Publication Title
Transcriptomic Analysis of the Mouse Mammary Gland Reveals New Insights for the Role of Serotonin in Lactation.
Sample Metadata Fields
No sample metadata fields
View Samples