To elucidate the effects of altered dietary carbohydrate and fat balance on liver and adipose tissue transcriptomes,
Transcriptomic responses of the liver and adipose tissues to altered carbohydrate-fat ratio in diet: an isoenergetic study in young rats.
No sample metadata fields
View SamplesBoth CLN1 and CLN5 deficiency leads to severe neurodegenerative diseases of childhood, known as neuronal ceroid lipofuscinoses (NCL). The broadly similar phenotypes of NCL mouse models, and the potential for interactions between NCL proteins, raise the possibility of shared or converging disease mechanisms. To begin addressing these issues we have developed a novel mouse model lacking both Cln1 and Cln5 genes. These Cln1/5 double knock-out (Cln1/5 dko) mice were fertile, showing a slight decrease in expected Mendelian breeding ratios, as well as impaired embryoid body formation of induced pluripotent stem cells derived from Cln1/5 dko fibroblasts. Typical manifestations of the NCL diseases, seizures and motor dysfunction, were detected at the age of 3 months, earlier than in either single knock-out mouse. Pathological analyses revealed a similar exacerbation and earlier onset of disease in Cln1/5 dko mice, which exhibit a pronounced accumulation of autofluorescent storage material. Cortical demyelination and more pronounced glial activation in cortical and thalamic regions was followed by cortical neuron loss. Alterations in lipid metabolism in Cln1/5 dko showed specifically an increase in serum phospholipid transfer protein (PLTP) activity. Finally, gene expression profiling of Cln1/5 dko cortex revealed defects in myelination and immune response pathways, with a prominent downregulation of alpha-synuclein in Cln1/5 dko mouse brains. The simultaneous loss of both Cln1 and Cln5 genes may enhance the typical pathological phenotypes of these mice by disrupting down shared or convergent pathogenic pathways, which may potentially include interactions of CLN1 and CLN5.
No associated publication
Sex, Age, Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Otitis media impacts hundreds of mouse middle and inner ear genes.
Age, Specimen part, Treatment
View SamplesObjective: Otitis media is known to alter expression of cytokine and other genes in the mouse middle ear and inner ear. However, whole mouse genome studies of gene expression in otitis media have not previously been undertaken. Ninety-nine percent of mouse genes are shared in the human, so these studies are relevant to the human condition.
Otitis media impacts hundreds of mouse middle and inner ear genes.
Age, Specimen part, Treatment
View SamplesNovel targeted agents used in therapy of lymphoid malignancies, such as inhibitors of B-cell receptor-associated kinases, are recognized to have complex immune-mediated effects. NEDD8-activating enzyme (NAE) has been identified as a tractable target in chronic lymphocytic leukemia (CLL) and non-Hodgkin lymphoma. We and others have shown that pevonedistat (TAK-924), a small molecule inhibitor of NAE, abrogates NF-κB signaling in malignant B cells. However, NF-κB pathway activity is indispensable in immune response, and T-cell function is altered in patients with CLL. Using T cells derived from patients with CLL, we demonstrate that while targeting NAE results in markedly differential expression of NF-κB-regulated genes and downregulation of IL-2 signaling during T-cell activation, T cells evade apoptosis. Meanwhile, NAE inhibition favorably modulates polarization of T cells in vitro, with decreased Treg differentiation and a shift towards TH1 phenotype, accompanied by increased interferon-γ production. These findings were recapitulated in vivo in immunocompetent mouse models. T cells exposed to pevonedistat in washout experiments, informed by its human pharmacokinetic profile, recover NAE activity and maintain their response to T-cell receptor stimulation and cytotoxic potential. Our data shed light on the potential immune implications of targeting neddylation in CLL and lymphoid malignancies.
No associated publication
Specimen part, Disease, Disease stage, Subject, Time
View SamplesObjective: Otitis media is known to alter expression of cytokine and other genes in the mouse middle ear and inner ear. However, whole mouse genome studies of gene expression in otitis media have not previously been undertaken. Ninety-nine percent of mouse genes are shared in the human, so these studies are relevant to the human condition.
Otitis media impacts hundreds of mouse middle and inner ear genes.
Age, Specimen part, Treatment
View SamplesA small block of the midbrain containing the dorsal raphe nucleus was obtained from ovariectomized monkeys treated with placebo, estrogen, progesterone or estrogen plus progesterone
No associated publication
Sex, Specimen part
View SamplesZaire ebolavirus (ZEBOV) infections are associated with high lethality in primates. ZEBOV primarily targets mononuclear phagocytes, which are activated upon infection and secrete mediators believed to trigger initial stages of pathogenesis. The characterization of the responses of target cells to ZEBOV infection may therefore not only further understanding of pathogenesis but also suggest possible points of therapeutic intervention. Gene expression profiles of primary human macrophages exposed to ZEBOV were determined using DNA microarrays and quantitative PCR to gain insight into the cellular response immediately after cell entry. Significant changes in mRNA concentrations encoding for 88 cellular proteins were observed. Most of these proteins have not yet been implicated in ZEBOV infection. Some, however, are inflammatory mediators known to be elevated during the acute phase of disease in the blood of ZEBOV-infected humans. Interestingly, the cellular response occurred within the first hour of Ebola virion exposure, i.e. prior to virus gene expression. This observation supports the hypothesis that virion binding or entry mediated by the spike glycoprotein (GP1,2) is the primary stimulus for an initial response. Indeed, ZEBOV virions, LPS, and virus-like particles consisting of only the ZEBOV matrix protein VP40 and GP1,2 (VLPVP40-GP) triggered comparable responses in macrophages, including pro-inflammatory and pro-apoptotic signals. In contrast, VLPVP40 (particles lacking GP1,2) caused an aberrant response. Notably, some cellular interferon-inducible genes were upregulated six hours after exposure to virions and LPS, but not after exposure to VLPVP40-GP. This suggests that GP1,2 binding to macrophages plays an important role in the immediate cellular response.
Ebola virion attachment and entry into human macrophages profoundly effects early cellular gene expression.
Disease, Disease stage, Subject
View SamplesSmall blocks of the midbrain containing the dorsal raphe nucleus was obtained from ovariectomized monkeys treated with placebo, estrogen, progesterone or estrogen plus progesterone for one month. The RNA was extracted and hybridized to the human U95A Affymetrix chip.
Preliminary array analysis reveals novel genes regulated by ovarian steroids in the monkey raphe region.
Sex, Specimen part
View SamplesWe treated intestinal enteroids continuously for 6 days with or without TgfbR1/2 inhibitor (LY2109761) or Tgfb1 ligand
Single cell lineage tracing reveals a role for TgfβR2 in intestinal stem cell dynamics and differentiation.
Specimen part
View Samples