Gene expression variation upon folate deficiency and repletion in human foreskin keratinocytes immortalized by HPV16E6E7 Overall design: Effects of folate modulation on several cellular events such as DNA stability
Folate Repletion after Deficiency Induces Irreversible Genomic and Transcriptional Changes in Human Papillomavirus Type 16 (HPV16)-Immortalized Human Keratinocytes.
Specimen part, Subject
View SamplesIn order to investigate what signalling pathways are turned on by tenascin-C, we generated Mouse Embryonic Fibroblasts (MEFs) deficient for tenascin-C and compared their gene expression profile to MEFs proficient for tenascin-C.
Tenascin-C triggers fibrin accumulation by downregulation of tissue plasminogen activator.
Specimen part
View SamplesWe used freshly established immortalized human keratinocytes with a well-defined HPV16 E6 E7 expression cassette to get a more complete and less biased overview about global changes induced by HPV16 using RNA-seq. We identified novel factors regulated by HPV oncogenes that could serve an essential role in cancer development. Overall design: mRNA profiles of human Keratinocytes transduced with HPV16-E6/E7 constructs and empty vectors in triplicates, sequenced with Illumina Hiseq 2000.
Combined Transcriptome and Proteome Analysis of Immortalized Human Keratinocytes Expressing Human Papillomavirus 16 (HPV16) Oncogenes Reveals Novel Key Factors and Networks in HPV-Induced Carcinogenesis.
Specimen part, Subject
View SamplesTo identify intrinsic mechanismis that mediating Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) resistance , gene expression analysis was performed on MDA-MB-231 cell lines exposed to TRAIL, in parental (Sensitive) or treat to resistance (TTR) conditions.
A Genome-Wide Loss-of-Function Screen Identifies SLC26A2 as a Novel Mediator of TRAIL Resistance.
Cell line
View SamplesCurrent methods to analyze gene expression measure steady-state levels of mRNA. In order to specifically analyze mRNA transcription, a technique has been developed that can be applied in-vivo. The technique is referred with the acronym NIAC-NTR (Non Invasive Application and Capture of Newly Transcribed RNA). This method makes use of the cellular pyrimidine salvage pathway and is based on affinity-chromatographic isolation of thiolated mRNA. When combined with data on mRNA steady-state levels, this method is able to assess the relative contributions of mRNA synthesis and degradation/stabilization. It overcomes limitations associated with currently available methods such as mechanistic intervention that disrupts cellular physiology, or the inability to apply the techniques in-vivo. The method has been applied to a model of serum response of cultured primary mouse embryonic fibroblasts.
Microarray analysis of newly synthesized RNA in cells and animals.
No sample metadata fields
View SamplesCurrent methods to analyze gene expression measure steady-state levels of mRNA. In order to specifically analyze mRNA transcription, a technique has been developed that can be applied in-vivo in intact cells and animals. The technique is referred with the acronym NIAC-NTR (Non Invasive Application and Capture of Newly Transcribed RNA). This method makes use of the cellular pyrimidine salvage pathway and is based on affinity-chromatographic isolation of thiolated mRNA. When combined with data on mRNA steady-state levels, this method is able to assess the relative contributions of mRNA synthesis and degradation/stabilization. It overcomes limitations associated with currently available methods such as mechanistic intervention that disrupts cellular physiology, or the inability to apply the techniques in-vivo. The method was applied to study renal ischemia reperfusion injury, demonstrating its applicability for whole organs in-vivo.
Microarray analysis of newly synthesized RNA in cells and animals.
Age
View SamplesThe transcriptional regulator Rbpj is involved in T-helper (TH) subset polarization, but its function in Treg cells remains unclear. Here we show that Treg-specific Rbpj deletion leads to splenomegaly and lymphadenopathy despite increased numbers of Treg cells with a polyclonal TCR repertoire. A specific defect of Rbpj-deficient Treg cells in controlling TH2 polarization and B cell responses is observed, leading to the spontaneous formation of germinal centers and a TH2-associated immunoglobulin class switch. The observed phenotype is environment-dependent and can be induced by infection with parasitic nematodes. Rbpj-deficient Treg cells adopt open chromatin landscapes and gene expression profiles reminiscent of tissue-derived TH2-polarized Treg cells, with a prevailing footprint of the transcription factor Gata-3. Taken together, our study suggest that Treg cells require Rbpj to specifically restrain TH2 responses, including their own excessive TH2-like differentiation potential. Overall design: We isolated Treg cells from spleens of affected Treg Rbpj-deficient animals and wildtype counterparts. Total RNA was isolated and subjected to gene expression analysis using RNA sequencing
Rbpj expression in regulatory T cells is critical for restraining T<sub>H</sub>2 responses.
Specimen part, Subject
View SamplesWe report here senescent changes in the structure and organization of the mucociliary pseudostratified epithelium of the mouse trachea and the main stem bronchi. We confirm previous reports of the graduate appearance of age-related, gland-like structures (ARGLS) in the submucosa, espeically in the intercartilage regions and carina. Immunohistochemistry shows these structures contain ciliated and secretory cells and Krt5+ basal cells, but not the myoepithelial cells or ciliated ducts typical of normal submucosal glands. Data suggests they arise de novo by budding from teh surface epithelium rather than by delayted growth of small or cryptic submucosal glands. In old mice the surface epithelium contains fewer cells per unit length than in young mice and the proportion of Krt5+, p63+ basal cells is reduced in both males and females. However, there appears to be no significant difference in the ability of basal stem cells isolated from individual young and old mice to form clonal tracheospheres in culture or in the ability of the pithelium to repair after damage by inhaled sulfur dioxide. Gene expression analysis by Affymetrix microarray and quantitative PCR, as well as immunohistochemistry and flow sorting studies, are consistent with low-grade chronic inflammation in the tracheas of old versus young mice. The significance of these changes for ARGL formation are not clear since several treatments that induce acute inflammation in young mice did not result in budding of the surface epithelium.
Age-related changes in the cellular composition and epithelial organization of the mouse trachea.
Sex, Age, Specimen part
View SamplesInterrogation and control of cellular fate and function using optogenetics is providing revolutionary insights into biology. Optogenetic control of cells is achieved by coupling genetically encoded photoreceptors to cellular effectors and enables unprecedented spatiotemporal control of signaling processes. Here, a fast and reversibly switchable photoreceptor is used to tune the mechanical properties of polymer materials in a fully reversible, wavelength-specific, and dose- and space-controlled manner. By integrating engineered cyanobacterial phytochrome 1 into a polyethylene glycol matrix, hydrogel materials responsive to light in the cell-compatible red/far-red spectrum are synthesized. These materials are applied to study in human mesenchymal stem cells how different mechano-signaling pathways respond to changing mechanical environments, and to control the migration of primary immune cells in 3D. This optogenetics-inspired matrix allows addressing fundamental questions of how cells react to dynamic mechanical environments. Further, remote control of such matrices could create new opportunities for tissue engineering or provide a basis for optically stimulated drug depots. Overall design: Analysis of global gene expression changes due to differences in the mechanical properties of the phytochrome-based hydrogels
Phytochrome-Based Extracellular Matrix with Reversibly Tunable Mechanical Properties.
Subject
View SamplesThis SuperSeries is composed of the SubSeries listed below.
BMP signaling and cellular dynamics during regeneration of airway epithelium from basal progenitors.
Sex, Specimen part, Treatment
View Samples