Few studies have investigated heterogeneity of selection response in replicate lines subjected to equivalent selection. We developed 4 replicate lines of mice based on high levels of voluntary wheel running (high runner or HR lines) while also maintaining 4 non-selected control lines. This led to the unexpected discovery of the HR mini-muscle (HRmini) phenotype, recognized by a 50% reduction in hindlimb muscle mass, which became fixed in 1 of the 4 HR selected lines.
Gene expression profiling of gastrocnemius of "minimuscle" mice.
Sex, Specimen part
View SamplesExposure to ultraviolet (UV) irradiation is the major cause of nonmelanoma skin cancer, the most common form of cancer in the United States. UV irradiation has a variety of effects on the skin associated with carcinogenesis, including DNA damage and effects on signal transduction. The alterations in signaling caused by UV regulate inflammation, cell proliferation, and apoptosis. UV also activates the orphan receptor tyrosine kinase and proto-oncogene Erbb2 (HER2/neu). In this study, we demonstrate that the UV-induced activation of Erbb2 regulates the response of the skin to UV. Inhibition or knockdown of Erbb2 before UV irradiation suppressed cell proliferation, cell survival, and inflammation after UV. In addition, Erbb2 was necessary for the UV-induced expression of numerous proinflammatory genes that are regulated by the transcription factors nuclear factor-kappaB and Comp1, including interleukin-1beta, prostaglandin-endoperoxidase synthase 2 (Cyclooxygenase-2), and multiple chemokines. These results reveal the influence of Erbb2 on the UV response and suggest a role for Erbb2 in UV-induced pathologies such as skin cancer.
Erbb2 regulates inflammation and proliferation in the skin after ultraviolet irradiation.
No sample metadata fields
View SamplesHuman subjects were randomized for treatment with a GnRH-analogue, Goserelin, which suppresses endogenous testosterone or placebo for 12 weeks. Strength training was performed during the last 8 weeks. The suppression of testosterone resulted in an attenuation of the normal muscle adaptation to strength training (increased muscle mass and strength). To identify molecular signals involved in the response to testosterone levels, biopsies were obtained 4 hours after the last training session and gene expression compared with Affymetrix 3' microarrays. This timepoint should capture goserelin effect on both constitutive expression, training induced changes as well as acute exercise induced (4 hours) differences in mRNA levels.
The activity of satellite cells and myonuclei following 8 weeks of strength training in young men with suppressed testosterone levels.
Sex, Age, Specimen part, Treatment
View SamplesWe applied RNA sequencing (RNA-seq) to map the global changes in gene expression of interscapular brown adipose tissue (iBAT) of mice subjected to acute cold exposure for 3 days. Here we find extensive changes in the iBAT transcriptome in response to cold with a prominent induction of genes associated to lipid-related metabolic processes. Overall design: RNA-seq of poly-A enriched RNA isolated from brown adipose tissue of 5 mice housed at room temperature (22°C) and 5 mice exposed to cold (4°C) for 3 days.
RNA-Seq and Mass-Spectrometry-Based Lipidomics Reveal Extensive Changes of Glycerolipid Pathways in Brown Adipose Tissue in Response to Cold.
No sample metadata fields
View SamplesDespite over 3,000 articles published on dystrophin in the last 15 years, the reasons underlying the progression of the human disease, differential muscle involvement, and disparate phenotypes in different species are not understood. The present experiment employed a screen of 12,488 mRNAs in 16-wk-old mouse mdx muscle at a time when the skeletal muscle is avoiding severe dystrophic pathophysiology, despite the absence of a functional dystrophin protein. A number of transcripts whose levels differed between the mdx and human Duchenne muscular dystrophy were noted. A fourfold decrease in myostatin mRNA in the mdx muscle was noted. Differential upregulation of actin-related protein 2/3 (subunit 4), beta-thymosin, calponin, mast cell chymase, and guanidinoacetate methyltransferase mRNA in the more benign mdx was also observed. Transcripts for oxidative and glycolytic enzymes in mdx muscle were not downregulated. These discrepancies could provide candidates for salvage pathways that maintain skeletal muscle integrity in the absence of a functional dystrophin protein in mdx skeletal muscle.
Regenerated mdx mouse skeletal muscle shows differential mRNA expression.
No sample metadata fields
View SamplesGene expression profiles of Immortalized KDM5A-/- MEFs with re-introduction of wild-type KDM5A or KDM5A-H483A mutant.
The KDM5 family is required for activation of pro-proliferative cell cycle genes during adipocyte differentiation.
Specimen part
View SamplesWe report pregnacy-induced changes at the RNA level using RNAseq Overall design: Comparison of RNA transcript of islets isolated from 5 control and 5 pregnant animals at gestational day 14.5
Research Resource: A Dual Proteomic Approach Identifies Regulated Islet Proteins During β-Cell Mass Expansion In Vivo.
Specimen part, Cell line, Subject
View SamplesThe goal of this study was to identify ion channels, specifically transient receptor potential cation channel A (trpA1) channels, that were highly expressed and enriched in nociceptive sensory neurons of Drosophila larvae. In class IV da sensory neurons, we find that TrpA1 is the most highly expressed trpA1 channel of the 14 trpA1 channels in Drosophila, and that its expression is highly enriched when compared to the whole animal transcriptome. Overall design: Four biological replicates of 100 Drosophila melanogaster larval class IV dendritic arborization sensory neurons and five biological replicates of whole Drosophila melanogaster larvae were profiled by mRNA-Seq
TrpA1 activation in peripheral sensory neurons underlies the ionic basis of pain hypersensitivity in response to vinca alkaloids.
Subject
View SamplesWe applied a deep-sequencing based method – digital gene expression profiling (DGEP), to investigate gene expression in interscapular brown adipose tissue (iBAT), inguinal white adipose tissue (iWAT) and epididymal white adipose tissue (eWAT) in acute cold exposure Overall design: Examination of gene expression level in 3 different adipose tissues in 3 time points, day0, day2 and day4 in cold exposure.
Transcriptome profiling of brown adipose tissue during cold exposure reveals extensive regulation of glucose metabolism.
No sample metadata fields
View SamplesThis study was conducted to determine heterogeneity of cancer-associated fibroblasts (CAFs) in mammary tumors, by unsupervised analysis of single cell transcriptomes. Overall design: 768 single EpCAM-, CD45-, CD31- NG2- fibroblasts were isolated from mammary tumors of two 14 week old MMTV-PyMT mice. The cells were sequenced following the Smart-Seq2 protocol (Picelli et al. Nature Methods 2013).
Spatially and functionally distinct subclasses of breast cancer-associated fibroblasts revealed by single cell RNA sequencing.
Age, Specimen part, Cell line, Subject
View Samples