Wilson disease (WD) is a severe metabolic disorder caused by genetic inactivation of copper-transporting ATPase ATP7B. In WD, copper accumulates in several tissues, particularly in the liver, inducing marked time-dependent pathological changes. To identify initial events in the copper-dependent development of liver pathology we utilized the Atp7b-/- mice, an animal model for WD. Analysis of mRNA from livers of control and Atp7b-/- 6 weeks-old mice using oligonucleotide arrays revealed specific changes of the transcriptome at this stage of copper accumulation. Few messages (29 up-regulated and 46 down-regulated) change their abundance more than 2-fold pointing to the specific effect of copper on gene expression/mRNA stability. The gene ontology analysis revealed copper effects on distinct metabolic pathways.
High copper selectively alters lipid metabolism and cell cycle machinery in the mouse model of Wilson disease.
No sample metadata fields
View SamplesIn this study we investigated the effect of normal chow (0 % cholesterol) or a semisynthetic diet (high sugar, 0.02 % cholesterol) fed to mice lacking either Mc4r, Ldlr or both and wildtype animals (total of 4 genotypes) by generating an expression profile of their livers after 6 months by RNA sequencing. Overall design: We investigated mice lacking either Mc4r, Ldlr or both and wildtype animals fed with normal chow or a semisynthetic diet with 10 replicates for each of the 8 resulting groups (4 genotypes * 2 diets).
Severe Atherosclerosis and Hypercholesterolemia in Mice Lacking Both the Melanocortin Type 4 Receptor and Low Density Lipoprotein Receptor.
Age, Specimen part, Cell line, Subject
View SamplesThe liver is frequently challenged by surgery-induced metabolic overload, viruses, or toxins, which induce the formation of reactive oxygen species. To determine the effect of oxidative stress on liver regeneration and to identify the underlying signalling pathways, we studied liver repair in mice lacking the Nrf2 transcription factor. In these animals, expression of several cytoprotective enzymes was reduced in hepatocytes, resulting in oxidative stress. As a consequence, tissue damage was aggravated, and liver regeneration after partial hepatectomy was delayed.
Impaired liver regeneration in Nrf2 knockout mice: role of ROS-mediated insulin/IGF-1 resistance.
Specimen part
View SamplesAnalysis of differential gene expression for rutured vs stable abdominal aortic aneurysms (AAA) and for intermediate size (55mm) vs large (>70mm) AAA.
Molecular Fingerprint for Terminal Abdominal Aortic Aneurysm Disease.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Adam17 Deficiency Promotes Atherosclerosis by Enhanced TNFR2 Signaling in Mice.
Sex
View SamplesGene expression analysis in tissues of Adam17 hypomorphic and wildtype control C57BL/6 mice.
Adam17 Deficiency Promotes Atherosclerosis by Enhanced TNFR2 Signaling in Mice.
Sex
View SamplesGene expression analysis in tissues of Adam17 hypomorphic and wildtype control C57BL/6 mice.
Adam17 Deficiency Promotes Atherosclerosis by Enhanced TNFR2 Signaling in Mice.
Sex
View SamplesThousands of long non-coding RNAs (lncRNAs) have been identified in the human genome, many of which are not conserved in lower mammals. The majority of these lncRNAs remain functionally uncharacterized and may have important implications in human physiology and disease. Here, we identify a primate-specific lncRNA, CHROME, which is increased in the plasma and atherosclerotic plaques of individuals with coronary artery disease compared to healthy controls. Using a loss-of-function approach, we show that CHROME functions as a competing endogenous RNA of microRNAs and regulates the concentration and biological functions of target genes. Overall design: We used three replicate samples of HEPG2 cells that were treated with shRNA for CHROME compated to three replicate control samples.
The long noncoding RNA CHROME regulates cholesterol homeostasis in primate.
Specimen part, Cell line, Subject
View SamplesObjective: Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS), characterized by a global increasing incidence driven by relapsing-remitting disease in females. p38 MAP kinase (MAPK) has been described as a key regulator of inflammatory responses in autoimmunity, but its role in the sexual dimorphism in MS or MS models remains unexplored. Methods: Toward this end, we used experimental autoimmune encephalomyelitis (EAE), the principal animal model of MS, combined with pharmacologic and genetic inhibition of p38 MAPK activity and transcriptomic analyses. Results: Pharmacologic inhibition of p38 MAPK selectively ameliorated EAE in female mice. Conditional deletion studies demonstrated that p38 signaling in macrophages/myeloid cells, but not T cells or dendritic cells, recapitulated this sexual dimorphism. Analysis of CNS inflammatory infiltrates showed that female, but not male mice lacking p38 in myeloid cells exhibited reduced immune cell activation compared with controls, while peripheral T cell priming was unaffected in both sexes. Transcriptomic analyses of myeloid cells revealed differences in p38-controlled transcripts comprising female- and male-specific gene modules, with greater p38 dependence of pro-inflammatory gene expression in females. Interpretation: Our findings demonstrate a key role for p38 in myeloid cells in CNS autoimmunity and uncover important molecular mechanisms underlying sex differences in disease pathogenesis. Taken together, our results suggest that the p38 MAPK signaling pathway represents a novel target for much needed disease modifying therapies for MS
Sex-specific control of central nervous system autoimmunity by p38 mitogen-activated protein kinase signaling in myeloid cells.
Sex, Specimen part
View SamplesWe established gene expression profiles of diagnostic bone marrow samples of monozygotic twins with acute lymphoblastic leukemia. We established technical duplicates for each twin.
Prenatal origin of separate evolution of leukemia in identical twins.
Sex, Specimen part, Disease, Disease stage
View Samples