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GSE14691
Mus musculus
58 Downloadable Samples
Description
Myotonic dystrophy type 1 (DM1) is an RNA dominant disease in which mutant transcripts containing an expanded CUG repeat (CUGexp) cause muscle dysfunction by interfering with biogenesis of other mRNAs. The toxic effects of mutant RNA are mediated partly through sequestration of splicing regulator Muscleblind-like 1 (Mbnl1), a protein that binds to CUGexp RNA. A gene that is prominently affected encodes chloride channel 1 (Clcn1), resulting in hyperexcitability of muscle (myotonia). To identify DM1-affected genes and study mechanisms for dysregulation, we performed global mRNA profiling in transgenic mice that express CUGexp RNA, as compared to Mbnl1 knockout and Clcn1 null mice. We found that the majority of changes induced by CUGexp RNA in skeletal muscle can be explained by reduced activity of Mbnl1, including many changes that are secondary to myotonia. The pathway most affected comprises genes involved in calcium signaling and homeostasis. Some effects of CUGexp RNA on gene expression are caused by abnormal alternative splicing or downregulation of Mbnl1-interacting mRNAs. However, several of the most highly dysregulated genes showed altered transcription, as indicated by parallel changes of the corresponding premRNAs. These results support the idea that trans-dominant effects of CUGexp RNA on gene expression in this transgenic model may occur at the level of transcription, RNA processing, and mRNA decay, and are mediated mainly but not entirely through sequestration of Mbnl1.
Publication Title
No associated publication
Sample Metadata Fields
Sex, Age
View Samples- Mus musculus
- 20 Downloadable Samples
Description
More than 2,000 genes appear to be upregulated or downregulated in skeletal muscle of mice with constitutive knockout of myostatin (Steelman et al., FASEB J 20:580-2, 2006). This study was done to determine whether inhibition of myostatin activity in mature mice has similar effects on the pattern of gene expression.
Publication Title
Stimulation of skeletal muscle myofibrillar protein synthesis, p70 S6 kinase phosphorylation, and ribosomal protein S6 phosphorylation by inhibition of myostatin in mature mice.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 10 Downloadable Samples
Description
RNA from 5 mice with postdevelopmental knockout of myostatin and 5 mice with normal myostatin expression was analyzed with comprehensive oligonucleotide microarrays. Myostatin depletion affected the expression of several hundred genes at nominal P < 0.01, but fewer than a hundred effects were statistically significant according to a more stringent criterion (false discovery rate < 5%). Most of the effects were less than 1.5-fold in magnitude. In contrast to previously-reported effects of constitutive myostatin knockout, postdevelopmental knockout did not downregulate expression of genes encoding slow isoforms of contractile proteins or genes encoding proteins involved in energy metabolism. Several collagen genes were expressed at lower levels in the myostatin-deficient muscles, and this led to reduced tissue collagen levels as reflected by hydroxyproline content. Myostatin knockout tended to down-regulate the expression of sets of genes with promoter motifs for Smad3, Smad4, myogenin, NF-B, serum response factor, and numerous other transcription factors. Main conclusions: in mature muscle, myostatin is a key transcriptional regulator of collagen genes, but not genes encoding contractile proteins or genes encoding proteins involved in energy metabolism.
Publication Title
Skeletal muscle gene expression after myostatin knockout in mature mice.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 10 Downloadable Samples
Description
This study compared gene expression in murine bcr-abl positive acute lymphoblastic leukemia cells in vivo in allogeneic BMT recipients compared to syngneneic BMT recipients.
Publication Title
Differential gene expression in acute lymphoblastic leukemia cells surviving allogeneic transplant.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
Description
Pulmonary alveoli contain two distinct populations of epithelial cells. Type II cells produce pulmonary surfactant lipids and surfactant-associated proteins (SP) required for maintaining alveolar surface tension at the air-liquid interface and host defense against respiratory pathogens. Type II cells are also progenitors for epithelial type I cells, a terminally differentiated elongated cell that covers microvascular endothelial cells and participates in gas exchange. Despite some indirect evidence, it is unknown whether subpopulations of type II cells exist. We created a line of transgenic mice expressing enhanced green fluorescent protein (EGFP) under control of the human SP-C promoter. Expression of EGFP may define a subpopulation of type II cells because it is 1) expressed in approximately 10% of type II cells, 2) appears much later in embryonic development than SP-C, and 3) selectively proliferates in mice infected with influenza A virus. To determine whether EGFP defines a unique subpopulation of type II cells, RNA was isolated from EGFP-positive and negative type II cells and hybridized to affymetrix arrays. Of the genes detected in EGFP-positive cells, most were equally detected in EGFP-negative cells. However, approximately 350 genes were selectively elevated 5-fold in EGFP-positive cells and 1500 genes selectively expressed by EGFP-negative cells. These findings suggest EGFP defines a subpopulation of type II epithelial cells in this line of transgenic mice.
Publication Title
No associated publication
Sample Metadata Fields
Age, Specimen part
View Samples- Mus musculus
- 26 Downloadable Samples
Description
Gene expression profiling of newborn lung tissue revealed few changes in compound FGFR3/FGFR4 deficient mice, consistent with their normal lung morphology at birth, suggesting the sequence of events leading to the phenotype initiates after birth in this model.
Publication Title
Fibroblast growth factor receptors control epithelial-mesenchymal interactions necessary for alveolar elastogenesis.
Sample Metadata Fields
Age, Specimen part
View Samples- Mus musculus
- 67 Downloadable Samples
Description
The Hippocampus Consortium data set provides estimates of mRNA expression in the adult hippocampus of 99 genetically diverse strains of mice including 67 BXD recombinant inbred strains, 13 CXB recombinant inbred strains, a diverse set of common inbred strains, and two reciprocal F1 hybrids.
Publication Title
Genetics of the hippocampal transcriptome in mouse: a systematic survey and online neurogenomics resource.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 10 Downloadable Samples
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Dynamic changes in 5-hydroxymethylation signatures underpin early and late events in drug exposed liver.
Sample Metadata Fields
Sex, Specimen part, Treatment, Time
View Samples- Mus musculus
- 93 Downloadable Samples
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Homer1a is a core brain molecular correlate of sleep loss.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus, Homo sapiens
- 2 Downloadable Samples
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
STAT6 transcription factor is a facilitator of the nuclear receptor PPARγ-regulated gene expression in macrophages and dendritic cells.
Sample Metadata Fields
Specimen part, Treatment, Subject, Time
View Samples