We examined the role of TREM2 on microglia responses to amyloid-beta deposition in a mouse model of Alzheimer's disease
TREM2 lipid sensing sustains the microglial response in an Alzheimer's disease model.
Age, Specimen part
View SamplesUsing microarray, we compared the transcriptome of the wild-type and Gbx2-KO thalamus at E12.5. We show that Gbx2 promotes thalamic but inhibits habenular molecular characters.
Gbx2 is essential for maintaining thalamic neuron identity and repressing habenular characters in the developing thalamus.
Specimen part
View SamplesPurpose: The goal of this study is to identify differentially expressed genes in pry-1/Axin mutant compare to N2 wild-type (WT). Our study represents the first analysis of Axin transcriptome in C. elegans and facilitates investigations of axin mediated processes. Overall design: Whole animal total RNA was extracted from L1 synchronized worms and mRNA profiles of WT and pry-1(mu38) animals were generated by paired end deep sequencing, using Illumina HISeq 2000. The sequence reads that passed quality filters were analyzed using ce6 with Burrows–Wheeler Aligner (BWA) followed by eXpress to estimate transcript abundances. Differentially-expressed genes were called at a false discovery rate (FDR) of 0.05% using the DESeq package in R.
PRY-1/Axin signaling regulates lipid metabolism in Caenorhabditis elegans.
Cell line, Subject
View SamplesBiological effects of overexpression of miR-146b microRNAs in the A549 human lung cancer cell-line was studied. A549 cells were engineered to express the precursor RNA (pre-miR-146b) that generates the miR-146b microRNAs. Control cells were engineered using the same gene expression plasmid (pLemiR, Open Biosystems) but without the pre-miR-146b insert. The Trans-Lentiviral GIPZ packaging system (Open Biosystems) was used to generate stable transfectant populations of the engineered cells.
Overexpression of the lung cancer-prognostic miR-146b microRNAs has a minimal and negative effect on the malignant phenotype of A549 lung cancer cells.
Disease, Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Human β-defensin 3 affects the activity of pro-inflammatory pathways associated with MyD88 and TRIF.
Specimen part, Treatment, Time
View SamplesWe examine the global effect of hBD3 on transcription in TLR4-stimulated macrophages and for the first time show that hBD3 inhibits the transcription of critical pro-inflammatory genes.
Human β-defensin 3 affects the activity of pro-inflammatory pathways associated with MyD88 and TRIF.
Specimen part, Treatment, Time
View SamplesWe carried out a global survey of age-related changes in mRNA levels in the C57BL/6NIA mouse hippocampus and found a difference in the hippocampal gene expression profile between 2-month-old young mice and 15-month-old middle-aged mice correlated with an age-related cognitive deficit in hippocampal-based explicit memory formation. Middle-aged mice displayed a mild but specific deficit in spatial memory in the Morris water maze.
Altered hippocampal transcript profile accompanies an age-related spatial memory deficit in mice.
Sex, Age, Specimen part
View SamplesThe Epidermal Growth Factor Receptor (EGFR) regulates a diverse set of biological processes including cell growth, proliferation, and differentiation. Deregulation of the EGFR pathway has been implicated in a variety of human diseases including cancer. Gefitinib and erlotinib are tyrosine kinase inhibitors (TKIs) that have demonstrated clinical benefit for patients with Non-small cell lung cancer (NSCLC) and EGFR activating mutations. However, patients invariably acquire resistance to TKI treatment through a number of mechanisms. We utilized in vitro models of NSCLC with EGFR activating mutations and derived three isogenic cell lines with acquired resistance to gefitinib. We next studied genomewide mRNA expression in resistance and wild type cells and their effect in the reprogramming of pathways in lung cancer cell line models.. Overall design: Differntial expresssion profile of transcripts of parental (HCC827) and EGFR-TKI (HCC827 ZDR3) resistance cells
JUN-Mediated Downregulation of EGFR Signaling Is Associated with Resistance to Gefitinib in EGFR-mutant NSCLC Cell Lines.
Cell line, Subject
View SamplesRNA transcriptome difference between WT and SFR KO iNKT cells To understand how SLAM family receptors (SFRs) contribute to iNKT cell development, a mouse lacking all SFRs in addition to the ligand of 2B4, CD48, was generated, and the transcriptional profiles of thymic iNKT cells from wild-type and SFR KO mice were compared, using RNA sequencing. Overall design: Examine RNA expression in WT and SFR KO iNKT cells Thymocytes were isolated from WT and SFR KO mice, and iNKT cells were enriched by negative selection. Unwanted cells (CD11b+ CD11c+ Gr-1+ Ter-119+ CD19+ CD8a+ cells) were targeted for removal with biotinylated antibodies (BioLegend), streptavidin-coated magnetic particles (RapidSpheres) and EasySep magnet (STEMCELL), and followed by staining with mCD1d/PBS-57 and anti-TCR. Then, iNKT cells were sorted with BD FACSAria III (BD Biosciences), and total RNA was isolated from sorted cells according to the manufacturer's instructions using the RNeasy plus micro kit (Qiagen). RNA-Seq library preparation was performed using the Illumina TruSeq Stranded mRNA Kit, according to manufacturer's instructions, and sequenced with Illumina HiSeq 2000 Sequencer. Read quality was confirmed using FastQC v0.10.1 before alignment using TopHat v2.0.10 on the mouse GRCm38/mm10 genome.
SLAM receptors foster iNKT cell development by reducing TCR signal strength after positive selection.
Specimen part, Subject
View SamplesWe investigated a drug-induced liver injury (DILI) model in rats induced by methapyrilene (MPy) administration. MPy, a former antihistamine and anticholinergic drug, was withdrawn in the 1970ties due to its ability to initiate hepatocarcinogenesis and is now used to induce hepatobiliary injury and biliary epithelial cell hyperplasia. Male Wistar rats (810 weeks old, weighing 170200 g) were randomly assigned to three dosing groups (n=6 per group and time-point) and dosed with MPy at 0, 30 and 80 mg/kg/day by oral gavage. After 4, 8 or 15 days, or after 14 days followed by a recovery period of 10 days (day 24) rats were sacrificed. Increased levels of ALAT, ASAT, AP and -GT as well as bili-t and total bile acids indicated liver damage (AP and GT indicating biliary effects). They were detectable on day 7 at the high dose of 80 mg/kg MPy and persisted until day 15 at end of treatment. Histopathologically, vacuolation and necrosis of the hepatocytes (predominantly in the periportal region) were seen starting on day 3 - especially in animals treated with 80 mg/kg MPy. These findings were accompanied by periportal mononuclear inflammatory cell filtration. Bile duct proliferation, bile duct hyperplasia and increased numbers of mitoses of hepatocytes were evident at all treatment time points. The frequency and severity of these findings increased with dose and duration of the treatment. Gene expression analysis in liver tissues revealed highly significant transcriptional changes in the high dose group, detectable on day 4 and intensifying over time. Besides genes associated with apoptosis (CASP4, CASP12), detoxification (CYB4B) and proliferation (p21, CCNG1) several were related to bile acid metabolism or transport. For example, bile acid exporters OATP1, NTCP, OATP4 and MOAT1/ OATPB as well as the putative bile acid metabolizing enzymes AMACR, BAAT and ACOX2 were found down regulated in response to MPy treatment. In contrast, mRNAs encoding putative bile acid importers MRP2 and ABCC4 / MRP4 were found up regulated. Most of the deregulated levels returned to control values during the recovery phase except OATP1, MOAT1/ OATPB, which remained slightly elevated. Interestingly, OATP4 followed an inverse trend of deregulation after 10 days of recovery, presumably due to overcompensation. Overall, the expression changes found associated with bile acid metabolism or transport could be linked to detected bile acid level alterations in liver and plasma.
Quantitative targeted bile acid profiling as new markers for DILI in a model of methapyrilene-induced liver injury in rats.
Sex, Specimen part
View Samples